Is Borewell Water Safe to Drink in India? What You Need to Know

Borewell water keeps a huge part of India supplied, from independent houses and apartment complexes to entire neighbourhoods where municipal supply does not reach or is not enough. It is convenient and often free at the point of use. But the question every household on a borewell eventually asks is a fair one: is borewell water actually safe to drink?

The short answer is that it usually is not, at least not without treatment. This guide explains why, what borewell water typically contains, how to find out what is in yours, and how to make it genuinely safe for your family.

What Is Borewell Water and Why So Many Rely on It

A borewell draws water from deep underground, from an aquifer below the surface. India depends on groundwater for roughly two-thirds of its drinking water, and borewells are how most of that is reached. In cities with patchy municipal supply, in new sectors and high-rises, and across rural India, the borewell is the everyday source.

The trouble is that groundwater is also where dissolved contamination is highest. Surface water picks up less on its way to you; groundwater sits in contact with rock and soil and dissolves whatever is there, which varies enormously by location.

Is Borewell Water Safe to Drink?

In most of India, borewell water is not safe to drink directly. The honest, complete answer has a few parts.

It almost always looks clear and often tastes normal, which is exactly the problem: the contaminants that matter most in groundwater are invisible and tasteless. Borewell water is typically high in TDS and hardness, and depending on the region it can carry fluoride, arsenic, nitrate, iron and bacteria. Some of these, like nitrate and arsenic, are serious health risks even though you cannot see or taste them.

Quality also varies sharply, from one street to the next and from season to season as the water table rises and falls. So borewell water that is fine in one home may be unsafe a kilometre away, and water that is acceptable after the monsoon may worsen in the dry months. This is why a blanket “it is fine” or “it is dangerous” is wrong: the only correct answer is to test your specific borewell and treat accordingly.

The takeaway: borewell water should be treated as untreated raw water. It is usually high in TDS and hardness and can carry fluoride, arsenic, nitrate, iron and bacteria. Test it, then treat it with reverse osmosis before drinking.

What Is Actually in Borewell Water

Here is what borewell water commonly carries in India, and why each matters.

What’s in it	BIS Acceptable Limit	Why It Matters
TDS (total dissolved solids)	500 mg/L	Borewell water often runs 800 to 2,000+ mg/L; affects taste and signals heavy dissolved load
Total hardness	200 mg/L	Causes scaling and a flat taste; very common in borewell belts
Fluoride	1.0 mg/L	Excess causes dental and skeletal fluorosis; high across Rajasthan, AP, Telangana and more
Arsenic	0.01 mg/L	Long-term toxin; concentrated in the Ganga and Brahmaputra plains
Nitrate	45 mg/L	Causes blue baby syndrome in infants; seeps in from fertiliser and sewage
Iron	0.3 mg/L	Causes a metallic taste, staining and turbidity; common in coastal and eastern belts
Bacteria	Should be absent	Can enter from shallow wells, leaks and contamination near the bore

Hardness and TDS are nearly universal in borewell water. The chemical contaminants are regional: fluoride dominates the western and southern groundwater belts, while arsenic is concentrated in the eastern river plains. Nitrate appears anywhere groundwater sits near farmland, which makes it especially relevant for homes with young children, as our guide to safe drinking water for children explains.

The India Picture

Government groundwater surveys repeatedly flag elevated hardness, fluoride, arsenic, nitrate and iron across India’s borewell-dependent districts. Because the contamination is so local, your district’s profile and your own tap can differ, which is why testing your specific borewell matters.

Source: CGWB Annual Ground Water Quality Report and India-WRIS, Govt. of India; BIS IS 10500

How to Test Your Borewell Water

You cannot judge borewell water by sight or taste, so testing is essential. Work through it in order of effort:

Check a TDS reading. Most purifier brands measure your tap TDS free during a pre-installation visit. It is a quick first signal of how heavy the dissolved load is.
Look up government data for your area. Use it as a guide to which contaminants are likely in your district. See the live, government-sourced reading for your city on our water quality checker.
Send a sample to a NABL-accredited lab. For a complete picture, get hardness, fluoride, arsenic, nitrate, iron and bacteriological tests done. This is worth doing once when you move in or install a purifier.

Because borewell quality shifts with the seasons, a one-time reading is a snapshot, not a guarantee. Ongoing monitoring is the way to stay matched to the real supply.

Can You Make Borewell Water Safe to Drink?

Yes, and the reliable way to do it is reverse osmosis. An RO purifier pushes water through a semi-permeable membrane whose pores block dissolved solids, hardness minerals, fluoride, arsenic and nitrate, while letting water through. Paired with a UV stage, it also inactivates bacteria and viruses. A good unit then balances minerals back so the water is pleasant and healthy.

This combination is what borewell water needs, because no single simpler method covers the full range of what borewell water carries. For the underlying technology comparison, see our RO vs UV vs UF guide, and to understand the TDS number itself, read our guide to TDS and BIS limits.

Why RO, Not Boiling or UV Alone

It is worth being clear about why the simpler options fall short for borewell water:

Boiling kills bacteria and reduces temporary hardness, but does nothing for TDS, fluoride, arsenic or nitrate, and slightly concentrates them as water evaporates.
UV inactivates microorganisms but leaves every dissolved contaminant untouched, so high-TDS borewell water stays high in TDS.
UF blocks particles and bacteria through a physical filter, but its pores are too large to stop dissolved hardness, fluoride, arsenic or nitrate.
RO is the only home technology that removes the dissolved contaminants borewell water carries, which is why it is the right choice for groundwater. If your water is also very hard, our hard water guide goes deeper.

On a borewell? Check the live, government-sourced reading for your pincode, then match a purifier rated for it.

Check Your Water Quality →

Why Boon Tall Is Built for Borewell Water

Boon Tall is designed for exactly the high-TDS, high-hardness water that borewells deliver. It comes from Boon, the water-technology company founded by ex-IIT Kanpur engineers and backed by the Technology Development Board (Government of India), NITI Aayog and Roca, whose systems serve more than 4,000 organisations worldwide.

8-Stage UltraOsmosis Rated to 2,000 ppm

Boon Tall handles input up to 2,000 ppm TDS, so even very heavy borewell supply is brought within a safe, palatable range, with fluoride, arsenic, nitrate and hardness removed and minerals balanced back.

60 LPH So Volume Is Never a Problem

Borewell households often run high volumes. At 60 litres per hour, Boon Tall refills quickly, so peak demand never leaves you waiting at the tap.

WaterAI Monitoring for Water That Changes

Because borewell quality shifts with the seasons, a fixed filter schedule is guesswork. Boon’s WaterAI app tracks input and output water quality and filter health in real time and alerts you when a filter genuinely needs changing. WaterAI won the iF Design Award 2026.

Free Professional Installation

Boon’s technicians measure your borewell input, install the unit, verify output quality and check every connection at no extra cost, so the purifier is matched to your real water from day one.

Why Boon Tall works for borewell water: a membrane rated to 2,000 ppm for the heaviest supply, 60 LPH so volume is never a problem, WaterAI to manage water that changes through the year, and free expert installation that confirms the fit to your exact tap.

Make your borewell water safe to drink: Boon Tall, 8-stage UltraOsmosis rated to 2,000 ppm, 60 LPH, WaterAI monitoring, and free professional installation.

Explore Boon Tall →

Frequently Asked Questions

Is borewell water safe to drink in India?

In most parts of India, borewell water is not safe to drink directly without treatment. Because it is drawn from underground, it is usually high in dissolved solids and hardness and can carry fluoride, arsenic, nitrate, iron and bacteria. It often looks clear and tastes normal even when contaminated, so it should be tested and then treated with a reverse osmosis purifier before drinking.

Why is borewell water high in TDS and hardness?

As rainwater filters down through soil and rock, it dissolves minerals such as calcium, magnesium, fluoride and salts. By the time it reaches the aquifer a borewell taps, it can carry several hundred to a few thousand milligrams of dissolved solids per litre. That is why borewell water is typically far higher in TDS and hardness than surface or municipal supply, and why it usually needs reverse osmosis.

Can I drink borewell water after boiling it?

Boiling only kills bacteria and reduces temporary hardness. It does not remove TDS, fluoride, arsenic, nitrate or most dissolved contaminants, and it slightly concentrates them as water evaporates. So boiling alone does not make borewell water safe to drink. For dissolved contaminants you need a reverse osmosis purifier, ideally with a UV stage.

Which water purifier is best for borewell water?

Choose a reverse osmosis purifier with a membrane rated for high TDS, ideally up to 2,000 ppm, paired with a UV stage and mineral balancing. RO removes the dissolved solids, hardness, fluoride, arsenic and nitrate; UV handles bacteria; mineral balancing keeps the water pleasant. Boon Tall is built for this, with 8-stage UltraOsmosis rated to 2,000 ppm, 60 litres per hour and WaterAI monitoring.

How do I test my borewell water quality?

Start with a TDS reading, which most purifier brands measure free during a pre-installation visit, and check government groundwater data for your area as a guide. For a full picture, send a sample to a NABL-accredited laboratory for hardness, fluoride, arsenic, nitrate, iron and bacteriological tests. Because borewell quality varies by location and season, testing your own borewell is the only reliable way to know what you are drinking.

Does borewell water quality change with the seasons?

Yes. Borewell water quality can change through the year as the water table rises and falls. TDS, hardness, nitrate and other contaminants often shift between the dry season and after the monsoon. This is why real-time monitoring is useful: it tracks your actual input water rather than assuming a fixed value, so your purifier and filter schedule stay matched to the real supply.

Boon Tall: 8-stage UltraOsmosis rated to 2,000 ppm, 60 LPH, WaterAI monitoring, and free professional installation. Built for India’s borewell and high-TDS water.

Shop Boon Tall →

June 26, 2026

Safe Drinking Water for Babies and Children in India: A Parent’s Guide

Every parent worries about what their child eats. Water deserves the same attention. A young child drinks more water relative to their body weight than an adult, and a baby’s developing system is far less able to cope with contaminants. In India, where most drinking water comes from groundwater that can carry nitrate, fluoride, arsenic and bacteria, getting the water right is one of the most important and most overlooked parts of keeping a child healthy.

This guide explains, in plain terms, why children are more vulnerable, what is actually in Indian drinking water, and how to give your family water you can trust. It is general information, not medical advice; for anything specific to your child, follow your paediatrician.

Why Children Are More Vulnerable to Unsafe Water

Children are not small adults when it comes to water safety. Three things make them more sensitive to contaminants:

They drink more for their size. Relative to body weight, an infant can consume far more water than an adult, so any contaminant is delivered in a higher effective dose.
Their organs are still developing. A baby’s kidneys, gut and blood system are immature, which makes them especially sensitive to substances like nitrate and lead.
The effects can be long term. Exposure to fluoride, arsenic or lead during the growing years can affect teeth, bones and development in ways that are hard to reverse.

This is why water that an adult might tolerate is not automatically fine for a child, and why infant formula in particular needs water that is genuinely clean.

The Real Risks in Indian Drinking Water for Kids

Most of India depends on groundwater, and groundwater is where the contaminants that matter most for children show up. None of these can be seen, smelled or tasted, which is exactly why they are dangerous: the water looks perfectly clear.

Nitrate and Blue Baby Syndrome

Nitrate is the single biggest water risk specific to infants. High nitrate causes methemoglobinemia, known as blue baby syndrome, where the blood cannot carry oxygen properly in babies under six months. Nitrate seeps into borewell and groundwater from fertilisers and sewage, so it is common in areas near farmland. The BIS limit is 45 mg/L with no relaxation, and the only way to know your level is to test.

Bacteria and Viruses

Microbial contamination causes the diarrhoeal illness that remains a leading threat to young children in India. Leaky pipes, mixed sewage and stored water all introduce bacteria and viruses. A UV stage in a purifier inactivates these organisms.

Fluoride

Excess fluoride causes dental fluorosis, the mottling and pitting of children’s teeth, and in severe long-term cases skeletal fluorosis. The BIS acceptable limit is 1.0 mg/L. Fluoride is naturally high in groundwater across Rajasthan, Gujarat, Andhra Pradesh, Telangana and parts of Karnataka and several other states. Our guide to fluoride in drinking water covers this in detail.

Arsenic and Lead

Arsenic in groundwater, concentrated in the Ganga and Brahmaputra plains, is a long-term toxin with no safe casual level; the BIS limit is just 0.01 mg/L. Lead can enter from old plumbing and fittings and is especially harmful to children’s development. Both are removed effectively by reverse osmosis. See our guide to arsenic and heavy metals in water.

Why Testing Matters

Nitrate, fluoride and arsenic are invisible and tasteless. Two homes in the same neighbourhood can have very different readings depending on whether they draw municipal supply, borewell or tanker water. The only way to know what your child is drinking is to check your actual tap.

Reference: BIS IS 10500 drinking-water standard; CGWB groundwater quality data, Govt. of India

Is RO Water Safe for Babies and Children?

Yes, and for groundwater-fed Indian homes it is usually the safest practical option. Reverse osmosis pushes water through a fine membrane that removes the dissolved contaminants that matter most for children: nitrate, fluoride, arsenic, lead and excess dissolved solids. Paired with a UV stage, it also inactivates bacteria and viruses. No home boiling or basic filter does all of this.

The common worry is that RO strips out healthy minerals too. Good RO purifiers solve this by balancing minerals back after purification, so the water your child drinks is clean and still contains calcium and magnesium at sensible levels. We cover this fully in is RO water safe to drink. The practical position is simple: for Indian groundwater, the risks RO removes far outweigh the small mineral adjustment it makes, and mineral balancing closes that gap.

The takeaway: for most Indian homes on groundwater, RO with a UV stage and mineral balancing is the safest everyday water for babies and children, because it removes nitrate, fluoride, arsenic and lead while keeping the water pleasant and mineral-balanced.

Water for Infant Formula: What to Do

Formula deserves special care because infants under six months are the most vulnerable group of all.

Start with purified water. Use water from an RO and UV purifier so nitrate, arsenic and dissolved contaminants are already removed.
Boil and cool, if advised. Many paediatricians recommend boiling the purified water and cooling it to a safe temperature before mixing formula, as an added safeguard against any contamination introduced after purification. Follow your doctor’s guidance for your baby’s age.
Use clean, sterilised bottles. Even the best water is undone by an unclean bottle.
Make it fresh. Prepare feeds as needed rather than storing mixed formula for long periods.

The order matters: purify first to remove what boiling cannot, then boil for the microbial safeguard. Boiling alone does not remove nitrate, fluoride or arsenic; in fact it slightly concentrates them as water evaporates.

Boiled vs Bottled vs RO Water for Children

Parents usually weigh three options. Here is how they compare for daily use.

Method	Removes Bacteria	Removes Nitrate / Fluoride / Arsenic	Everyday Practicality
Boiling only	Yes	No (slightly concentrates them)	Time-consuming; no chemical safety
Bottled water	Usually	Varies by brand	Expensive, plastic-heavy, inconsistent
RO + UV purifier	Yes (UV)	Yes (RO)	Consistent, low cost per litre, no plastic

Boiling handles germs but not chemistry. Bottled water is fine for travel but costly and wasteful as a daily habit, and quality varies. An RO and UV purifier is the only option that covers both the microbial and the chemical risks consistently, at a low cost per litre. For the full cost picture, see our true cost of ownership guide.

Not sure what is in your family’s water? Check the live, government-sourced reading for your pincode before you decide.

Check Your Water Quality →

How to Choose a Purifier for a Family with Young Children

For a household with babies or young children, prioritise these features:

Reverse osmosis with a UV stage, so both dissolved contaminants and microorganisms are handled.
Mineral balancing, so purified water is healthy and pleasant rather than flat.
A membrane rated for your water. If you are on borewell or high-TDS supply, the unit must be specified for it. Check your borewell water level first.
Real-time monitoring, so you replace filters based on actual water quality, not guesswork, and never unknowingly serve under-filtered water.
Professional installation, so the purifier is matched and verified against your real tap from day one.

Why Boon Is Built for Family Drinking Water

Boon is a water-technology company founded by ex-IIT Kanpur engineers and backed by the Technology Development Board (Government of India), NITI Aayog and Roca. Its systems serve more than 4,000 organisations worldwide, and the same engineering goes into its home purifiers, Boon Tap (under-sink) and Boon Tall (freestanding).

8-Stage UltraOsmosis

Both home models use an 8-stage UltraOsmosis process that removes nitrate, fluoride, arsenic, lead and dissolved solids, then balances minerals back to a healthy level, so the water is safe for the whole family and genuinely pleasant to drink.

WaterAI Monitoring

The WaterAI app tracks input and output water quality and filter health in real time, and alerts you when a filter actually needs changing. For a home with young children, that means never unknowingly serving under-filtered water. WaterAI won the iF Design Award 2026.

Free Professional Installation

Boon’s own technicians measure your input water, install the unit and verify output quality, so the purifier is matched to your exact supply from the start. If your water is hard or from a borewell, our hard water guide explains why a properly rated unit such as Boon Tall matters.

Give your family water you can trust: 8-stage UltraOsmosis with RO and UV, mineral balancing, WaterAI monitoring, and free professional installation.

Explore Boon Tap →

Frequently Asked Questions

What is the safest drinking water for babies in India?

For babies, the safest water is free of bacteria, nitrate, lead and dissolved contaminants. In most Indian homes that means water from an RO purifier with a UV stage. For infants under six months, water for formula should be purified and then boiled and cooled, following your paediatrician’s guidance. Plain tap or untreated borewell water is not recommended for infants because of nitrate and bacterial risk.

Is RO water safe for babies and young children?

Yes. RO water is safe when the purifier removes contaminants and then balances minerals back, which good systems do. RO removes nitrate, arsenic, lead and excess fluoride that are especially harmful to infants, and a UV stage inactivates bacteria and viruses. Mineral balancing addresses the concern about RO removing minerals.

Why is nitrate in water dangerous for infants?

High nitrate causes methemoglobinemia, or blue baby syndrome, in infants under six months by reducing the blood’s ability to carry oxygen. The BIS limit is 45 mg/L with no relaxation. Nitrate is common in borewell and groundwater near farmland and has no taste or smell, so it must be tested for. Reverse osmosis removes it effectively.

Should I boil water for my baby if I have an RO purifier?

For infants under six months, many paediatricians still recommend boiling and cooling purified water before preparing formula, as an extra safeguard against contamination introduced after purification. RO with UV already removes chemical and microbial risks from the supply, so for older children purified water is generally sufficient. Always follow your paediatrician’s advice and use sterilised bottles.

Is bottled water safe for children?

Packaged water is generally safe but is an expensive and plastic-heavy way to give children daily water, and quality varies. Bottles stored in heat can leach plastic compounds. For daily home use, a maintained RO and UV purifier gives consistent quality at a fraction of the cost and without the plastic waste. Keep bottled water for travel.

How do I choose a water purifier for a home with young children?

Choose an RO purifier with a UV stage and mineral balancing, sized for your water quality. Check your tap TDS and contaminants first, since borewell and high-TDS supply needs a membrane rated for it. Look for real-time monitoring and professional installation. Boon Tap and Boon Tall both use 8-stage UltraOsmosis with WaterAI monitoring and free professional installation.

Boon home purifiers: 8-stage UltraOsmosis with RO and UV, mineral balancing, WaterAI monitoring, and free professional installation. Safe water for every member of the family.

Shop Boon Purifiers →

June 26, 2026

Fluoride in Drinking Water in India: Safe Limits, Health Effects and How to Remove It

Fluoride is one of the most misunderstood things in drinking water. A little of it protects teeth, which is why it is added to toothpaste. But too much of it, which is exactly the situation across large parts of India, quietly damages teeth and bones over years. The difference between helpful and harmful is a very small number, and that is what makes fluoride worth understanding properly.

This guide explains what fluoride is, how much is safe under Indian standards, what excess does to health, where in India it is a problem, and how to remove it from the water you drink.

What Is Fluoride and Why It Is in Water

Fluoride is a natural compound found in rocks and soil. As groundwater sits in contact with fluoride-bearing rock, the fluoride dissolves into it. This is why fluoride is overwhelmingly a groundwater problem: borewells and deep wells in certain geological belts draw water that has picked up high fluoride naturally, with no industrial source involved.

Because it is geological, fluoride is intensely local and tends to be persistent. A region sitting on fluoride-rich rock will show high fluoride year after year, which is why it has become a long-term public-health issue in the affected belts.

How Much Fluoride Is Safe?

Under the Bureau of Indian Standards (BIS IS 10500), the limits for fluoride in drinking water are:

Acceptable limit: 1.0 mg/L
Permissible maximum: 1.5 mg/L (in the absence of an alternate source)

What makes fluoride unusual is the narrow safe window. Unlike most contaminants, where less is simply better, a small amount of fluoride is beneficial for teeth. But the margin is slim: cross roughly 1.5 mg/L and the balance tips towards harm. Much of India’s affected groundwater sits not just over the limit but several times above it, which is where serious health damage begins.

The takeaway: the safe range for fluoride is small, between roughly 1.0 and 1.5 mg/L. Below that it helps teeth; above it, the risk of fluorosis rises steadily. With fluoride, the precise level in your water is what counts.

The Health Effects of Excess Fluoride

Excess fluoride causes a condition called fluorosis, which appears in two main forms.

Dental Fluorosis

The earliest and most common sign is dental fluorosis: white flecks, then yellow-brown staining, and in worse cases pitting and roughening of the tooth enamel. It is most damaging while children’s permanent teeth are still forming, which is why fluoride matters so much for families with young children, as covered in our guide to safe drinking water for children.

Skeletal Fluorosis

Prolonged exposure to higher fluoride levels causes skeletal fluorosis, where fluoride accumulates in bones, making them stiff, painful and brittle. In severe, long-term cases it damages joints and the spine and can be disabling. This is the most serious consequence of the high-fluoride belts in India, and it is the reason a national programme exists to prevent and control fluorosis.

A National Concern

Fluorosis from drinking water is recognised as a significant public-health problem across many Indian states, which is why the Government of India runs a dedicated National Programme for Prevention and Control of Fluorosis. The contamination is natural and geological, not industrial, and it persists year after year in affected belts.

Reference: BIS IS 10500; CGWB groundwater quality data; Govt. of India fluorosis programme

Where Fluoride Is High in India

High fluoride in groundwater has been recorded across a large number of states. The most affected belts include:

Region	Status	Notes
Rajasthan	Severely affected	One of India’s worst fluoride belts; widespread across districts
Gujarat	Widely affected	High fluoride paired with high hardness and TDS in groundwater
Andhra Pradesh and Telangana	Severely affected	Long-recognised endemic fluorosis areas
Karnataka and Tamil Nadu	Affected pockets	Concentrated in groundwater-dependent districts
Madhya Pradesh, UP, Bihar	Affected pockets	Localised high-fluoride zones in groundwater belts
Punjab and Haryana	Affected pockets	Often alongside high salinity and nitrate

The pattern is regional but patchy: within an affected state, some areas are perfectly fine and others are several times over the limit. To see the live, government-sourced reading for your city, open your water quality report, for example Hyderabad water quality or Ahmedabad water quality. Fluoride also frequently travels with hardness in borewell water, so our borewell water guide is a useful companion read.

How to Know If Your Water Has Fluoride

You cannot taste, see or smell fluoride, so the only way to know is to find out:

Check government groundwater data for your district as a first guide to whether fluoride is likely in your area.
Get a laboratory test. Send a sample to a NABL-accredited lab for a fluoride test, especially if you are on borewell or groundwater in an affected state.
Watch for community signs. Visible fluorosis staining on teeth in the local population is a strong warning that fluoride in the area is high.

Because fluoride is invisible, families in affected belts often only discover the problem once dental fluorosis appears in children, by which point exposure has been going on for years. Testing early is the sensible course.

How to Remove Fluoride from Drinking Water

This is where many common assumptions are wrong, so it is worth being precise:

Boiling does not remove fluoride. It concentrates it slightly, because only water evaporates.
Carbon filters and UV do not remove fluoride. Carbon improves taste and removes chlorine; UV inactivates microbes. Neither touches dissolved fluoride.
Activated alumina and bone char can reduce fluoride but need careful, regular maintenance and are not practical for most homes.
Reverse osmosis is the reliable home method. The RO membrane physically removes dissolved fluoride along with other dissolved solids, and a good unit then balances minerals back for taste and health.

For fluoride-affected groundwater, an RO purifier rated for your local TDS is the practical, lasting answer. To understand how the technologies differ, see our RO vs UV vs UF guide, and for the dissolved-solids number itself, our guide to TDS and BIS limits.

Live in a fluoride-affected area? Check the live, government-sourced reading for your pincode, then match an RO purifier rated for it.

Check Your Water Quality →

Why Boon Removes Fluoride Safely

Boon is a water-technology company founded by ex-IIT Kanpur engineers and backed by the Technology Development Board (Government of India), NITI Aayog and Roca, with systems serving more than 4,000 organisations worldwide. Its home purifiers, Boon Tap and Boon Tall, are built for exactly the high-fluoride, high-TDS groundwater that affects much of India.

8-Stage UltraOsmosis Rated for High Groundwater Load

Boon’s 8-stage UltraOsmosis process removes dissolved fluoride along with arsenic, nitrate, hardness and other dissolved solids, then balances minerals back so the water is safe and pleasant. Boon Tall is rated for input up to 2,000 ppm TDS, which suits the heavy groundwater of fluoride belts such as Rajasthan, Gujarat and the Telugu states.

WaterAI Monitoring

Boon’s WaterAI app tracks input and output water quality and filter health in real time, so you can see that fluoride and other contaminants are being handled rather than trusting a fixed schedule. WaterAI won the iF Design Award 2026.

Free Professional Installation

Boon’s technicians measure your input water, install the unit and verify output quality at no extra cost, so the purifier is matched to your real fluoride and TDS levels from day one.

Remove fluoride the reliable way: Boon’s 8-stage UltraOsmosis, rated to 2,000 ppm, with mineral balancing, WaterAI monitoring, and free professional installation.

Explore Boon Tall →

Frequently Asked Questions

How much fluoride in drinking water is safe in India?

Under BIS IS 10500, the acceptable limit for fluoride is 1.0 mg/L and the permissible maximum is 1.5 mg/L. A small amount helps dental health, but the safe window is narrow: above about 1.5 mg/L the risk of dental fluorosis rises, and prolonged exposure to higher levels causes skeletal fluorosis. Because the gap between beneficial and harmful is so small, the exact number in your water matters.

What are the health effects of too much fluoride in water?

Excess fluoride causes fluorosis. Dental fluorosis shows up as white patches, yellow-brown staining and pitting of teeth, and is most damaging while children’s teeth are forming. Long-term exposure to higher levels causes skeletal fluorosis, which stiffens and damages bones and joints and can be disabling. India runs a national programme to prevent and control fluorosis because it is so widespread in groundwater.

Which states in India have high fluoride in groundwater?

High fluoride has been recorded across many states, including Rajasthan, Gujarat, Andhra Pradesh, Telangana, Karnataka, Madhya Pradesh, Uttar Pradesh, Bihar, Punjab, Haryana and Tamil Nadu. It is concentrated in areas dependent on deep groundwater, where fluoride leaches naturally from rock. Levels vary sharply by location, so even within an affected state some areas are fine and others are well above the limit.

Does boiling water remove fluoride?

No. Boiling does not remove fluoride. Because fluoride is dissolved and boiling only evaporates water, boiling actually concentrates fluoride slightly. Ordinary carbon filters and UV purifiers do not remove it either. The reliable home method for removing fluoride is reverse osmosis, whose membrane physically separates fluoride from the water.

How do I remove fluoride from drinking water at home?

The most reliable home method is a reverse osmosis purifier. The RO membrane removes dissolved fluoride along with other dissolved solids, and a good unit then balances minerals back for taste and health. Activated alumina and bone-char filters can also reduce fluoride but need careful maintenance and are less practical for homes. For most Indian households in fluoride-affected areas, an RO purifier rated for the local TDS is the right solution.

Can I tell if my water has fluoride by taste?

No. Fluoride has no taste, colour or smell at drinking-water levels, so you cannot detect it without testing. If you live in a fluoride-affected region, especially one dependent on borewell or groundwater, get a laboratory test and check government groundwater data for your area. Visible fluorosis staining on teeth in the community is a warning sign that local fluoride may be high.

Boon Tall: 8-stage UltraOsmosis rated to 2,000 ppm, with mineral balancing, WaterAI monitoring, and free professional installation. Built to remove fluoride from India’s hardest groundwater.

Shop Boon Tall →

June 26, 2026

Chlorine in Tap Water in India: Is It Safe and Should You Remove It?

If your tap water sometimes smells faintly of a swimming pool, that is chlorine, and its presence is not an accident. Municipal water bodies add chlorine on purpose to keep water safe. Yet most people do not enjoy drinking it, and there are good reasons to remove the residual chlorine before it reaches your glass. This guide explains why chlorine is there, whether it is safe, and how to deal with it.

Why There Is Chlorine in Your Tap Water

Chlorine is the workhorse of municipal water treatment. It is added to kill bacteria and viruses at the treatment plant, and crucially it leaves a small residual amount in the water so that it stays disinfected on its long journey through pipes and tanks to your home. Without that residual, water could pick up contamination anywhere along the network.

This is why the Bureau of Indian Standards recommends a minimum free residual chlorine of about 0.2 mg/L at the consumer end when water is chlorinated. In other words, a little chlorine in your tap water is a sign the system is doing its job.

The takeaway: chlorine in tap water is intentional and protective. The small residual keeps water disinfected through the pipes. The reasons to remove it are taste, smell and disinfection byproducts, not acute danger from the chlorine itself.

Is Chlorine in Tap Water Safe?

At the controlled levels used in municipal supply, the chlorine residual is considered safe to drink, and the protection it provides against waterborne disease is significant. So the honest framing is that chlorine is a net positive in the supply network: the disease it prevents far outweighs the risk of the residual itself.

That said, “safe to drink” is not the same as “pleasant to drink” or “ideal.” The taste and smell are off-putting, and there is a secondary concern about what chlorine can form when it reacts with organic matter, which is where most people decide to filter it out at the point of use.

The Downsides: Taste, Smell and Byproducts

There are two practical reasons to remove residual chlorine before drinking:

Taste and smell. The chlorine residual gives water a distinct pool-like odour and a flat, chemical taste that puts many people off drinking enough water at all.
Disinfection byproducts. When chlorine reacts with natural organic matter in water, it can form byproducts such as trihalomethanes. At the low levels of a well-managed supply these are generally considered low risk, but long-term exposure to higher levels is something water guidelines aim to limit, so reducing them is sensible.

Both are addressed by the same simple technology: activated carbon, which adsorbs chlorine and its byproducts and restores a clean taste.

Chlorine vs Groundwater Contaminants

It is worth putting chlorine in context. Chlorine is mainly a municipal-supply issue: it appears in treated piped water. The contaminants that dominate India’s borewell and groundwater are different, things like fluoride, arsenic, nitrate and hardness, which chlorination does not address and which need reverse osmosis.

Many Indian homes receive a mix of municipal and borewell water depending on the season and supply, so the ideal purifier handles both: carbon for chlorine and taste, and RO for the dissolved groundwater contaminants. To see what is actually in your supply, check the live, government-sourced reading for your area.

Two Different Problems

Chlorine is something the water authority adds to keep piped water safe. Fluoride, arsenic and nitrate are things nature or pollution put into groundwater. A good purifier removes the chlorine residual for taste and the dissolved contaminants for safety, in one system.

Reference: BIS IS 10500 (free residual chlorine guidance); CGWB groundwater quality data

How to Remove Chlorine from Drinking Water

Removing chlorine is one of the easier water tasks:

Activated carbon filtration is the standard, effective method. Carbon adsorbs chlorine and byproducts and removes the taste and smell. It is a core stage in modern purifiers.
Letting water stand allows some chlorine to dissipate over time, but it is slow, inconsistent, and does nothing for byproducts or for groundwater contaminants.
Reverse osmosis purifiers include carbon stages before the membrane, partly to protect the membrane from chlorine, so they remove chlorine and taste while also removing dissolved contaminants. This is the most complete option.

For most homes, a purifier that combines carbon stages with RO is the practical answer, because it solves the chlorine taste and the groundwater chemistry together. Our RO vs UV vs UF guide explains how the stages fit together.

Want to know what is in your supply beyond chlorine? Check the live, government-sourced reading for your pincode.

Check Your Water Quality →

How Boon Handles Chlorine and More

Boon is a water-technology company founded by ex-IIT Kanpur engineers and backed by the Technology Development Board (Government of India), NITI Aayog and Roca, with systems serving more than 4,000 organisations worldwide.

8-Stage UltraOsmosis with Carbon Stages

Boon’s 8-stage UltraOsmosis includes activated carbon stages that remove chlorine, its byproducts and the chemical taste, ahead of the RO membrane that removes dissolved groundwater contaminants. So whether your supply is chlorinated municipal water, borewell water or a mix, one system handles it and balances minerals back for a clean taste.

WaterAI Monitoring

The WaterAI app tracks input and output water quality and filter health in real time, so you know the carbon and membrane stages are working. WaterAI won the iF Design Award 2026.

Free Professional Installation

Boon’s technicians install the unit, measure your input water and verify output quality at no extra cost, so the purifier is matched to your real supply from day one.

Clean-tasting, fully treated water: Boon’s 8-stage UltraOsmosis with carbon stages and RO, mineral balancing, WaterAI monitoring, and free professional installation.

Explore Boon Tall →

Frequently Asked Questions

Is chlorine in tap water safe to drink in India?

A small, controlled amount of chlorine is intentional and safe; municipal bodies add it to kill bacteria and viruses and to keep water disinfected through the pipes. The BIS standard recommends a minimum free residual chlorine of about 0.2 mg/L for this reason. The downsides are mainly taste and smell, and the disinfection byproducts that can form when chlorine reacts with organic matter. So chlorine itself is a safety feature, but most people prefer to remove the residual and its byproducts before drinking.

Why does my tap water smell like chlorine?

That swimming-pool smell is residual chlorine left in the water after municipal disinfection. It is a sign the water has been treated, which is good, but the taste and odour are unpleasant and put many people off tap water. The smell is usually harmless at normal municipal levels and is easily removed by an activated carbon filter, a standard stage in modern purifiers.

What are disinfection byproducts and are they harmful?

Disinfection byproducts, such as trihalomethanes, form when chlorine reacts with natural organic matter in water. At the low levels found in well-managed supplies they are generally considered low risk, but long-term exposure to higher levels is something water guidelines aim to limit. Activated carbon reduces chlorine and these byproducts, and reverse osmosis provides a further barrier, which is why a purifier with both is sensible for chlorinated water.

How do I remove chlorine from drinking water?

The simplest and most effective home method is an activated carbon filter, which adsorbs chlorine and improves taste and smell. Letting water stand allows some chlorine to dissipate but is slow, inconsistent and does nothing for byproducts. Modern purifiers include carbon stages, and an RO purifier adds a further barrier while removing dissolved contaminants, so a single purifier handles chlorine, its byproducts and the rest of your water quality.

Does an RO purifier remove chlorine?

Yes. RO purifiers include activated carbon stages that remove chlorine and improve taste before the water reaches the membrane, partly to protect the membrane itself. The combination of carbon filtration and the RO membrane removes residual chlorine and disinfection byproducts along with dissolved contaminants such as fluoride, arsenic, nitrate and hardness. Boon’s 8-stage UltraOsmosis includes carbon stages for exactly this purpose.

Boon home purifiers: 8-stage UltraOsmosis with carbon stages and RO, mineral balancing, WaterAI monitoring, and free professional installation. Clean taste, fully treated water.

Shop Boon Purifiers →

June 26, 2026

Arsenic and Heavy Metals in Drinking Water in India: Risks, Hotspots and How to Remove Them

Of all the things that can be in drinking water, arsenic is among the most feared, and for good reason. It is invisible, tasteless and odourless, it accumulates in the body over years, and in parts of India it sits in the groundwater that millions of people drink every day. Lead and other heavy metals carry similar risks. This guide explains what these contaminants are, why they are so serious, where in India they are concentrated, and how to remove them from the water you drink.

This is general information, not medical advice. If you live in an affected area and have health concerns, consult a doctor and have your water tested.

What Are Arsenic and Heavy Metals in Water?

Arsenic is a naturally occurring element found in the earth’s crust. In India’s affected belts it leaches from sediment into groundwater, so the contamination is natural and geological rather than industrial, which is why it follows the river basins. Heavy metals such as lead, mercury, cadmium and chromium can enter water both naturally and from industrial discharge, old plumbing and fittings, or contaminated land.

What these contaminants share is that they are toxic at very low concentrations and that the body cannot easily get rid of them. They build up over time, which is why the safe limits are tiny and why long-term exposure is the real danger.

Why Arsenic Is So Dangerous

Arsenic is dangerous for three reasons that combine badly.

First, it is completely undetectable by sight, taste or smell, so contaminated water looks and tastes perfectly normal. People drink it for years without any warning.

Second, it is a cumulative toxin. There is no safe casual level; the harm comes from steady, long-term intake. The BIS limit is just 0.01 mg/L (10 micrograms per litre), matching the World Health Organization guideline, precisely because even small amounts add up.

Third, the health effects are severe. Long-term arsenic exposure causes arsenicosis, with characteristic skin lesions and pigmentation changes, and significantly raises the risk of skin, bladder and lung cancers. It is also linked to cardiovascular disease and to developmental harm, which makes it especially concerning for children, as our guide to safe drinking water for children discusses.

The takeaway: arsenic is invisible, cumulative and seriously toxic, with a BIS limit of just 0.01 mg/L. In affected areas, the only safe assumption is that untreated groundwater may carry it, and the only way to be sure is to test and treat.

Where Arsenic Is High in India

Arsenic contamination in India follows the great river plains, where the sediment carries arsenic into the groundwater. The most affected regions are:

Region	Status	Notes
West Bengal (Ganga delta)	Severely affected	One of the world’s most studied arsenic-affected regions
Bihar (Gangetic plain)	Severely affected	Widespread contamination along the river belt
Uttar Pradesh (eastern districts)	Affected	Concentrated in the Gangetic floodplain
Jharkhand and Assam	Affected pockets	Along the Ganga and Brahmaputra systems
Other river-plain pockets	Localised	Scattered hotspots in several states

Because the contamination is geological and tied to the river systems, it affects borewell-dependent communities across these belts. To see the live, government-sourced reading for your city, open your water quality report, for example Kolkata water quality. Arsenic also commonly appears alongside high TDS and other contaminants in groundwater, so our borewell water guide is a useful companion read.

A Government Priority

Arsenic in groundwater is tracked in the CGWB Annual Ground Water Quality Report and is the focus of dedicated mitigation efforts in the worst-affected states. As with fluoride, the contamination is natural, persistent and concentrated in specific geological belts, so the reading for your exact location is what matters.

Source: CGWB Annual Ground Water Quality Report and India-WRIS, Govt. of India; BIS IS 10500; WHO guideline 10 ug/L

Other Heavy Metals to Know About

Arsenic is the headline, but a few other contaminants belong in the same conversation:

Lead (BIS limit 0.01 mg/L): can leach from old pipes, solder and brass fittings. It is especially harmful to children’s brain development, so it matters even where the supply itself is clean but the plumbing is old.
Iron (BIS limit 0.3 mg/L): not a toxic heavy metal in the way arsenic and lead are, but very common in eastern and coastal groundwater. It causes a metallic taste, rust-coloured staining and turbidity.
Mercury, cadmium and chromium: rarer, usually linked to industrial discharge or contaminated land, and toxic at low levels.

The good news is that the same technology that removes arsenic also removes lead and these other dissolved metals, so a single correct solution covers the whole group.

How to Know If Your Water Has Arsenic or Heavy Metals

Since arsenic and lead are invisible and tasteless, testing is the only way to be sure:

Check government groundwater data for your district to know whether arsenic is likely in your area. See the live reading for your city on our water quality checker.
Get a laboratory test from a NABL-accredited lab for arsenic and heavy metals, especially if you are on borewell or groundwater in the Ganga or Brahmaputra belts.
Consider your plumbing for lead specifically: very old fittings and solder are the usual source, independent of the supply.

If you are in a known arsenic belt, do not wait for symptoms; arsenicosis appears only after years of exposure, by which point significant intake has already occurred.

How to Remove Arsenic and Heavy Metals

As with fluoride, the simpler methods do not work for arsenic and heavy metals:

Boiling does not remove arsenic or heavy metals and slightly concentrates them as water evaporates.
UV only inactivates microorganisms and does nothing to dissolved metals.
Carbon filters and UF leave dissolved arsenic and heavy metals largely untouched.
Reverse osmosis is the reliable home technology: its membrane physically removes dissolved arsenic, lead and other heavy metals along with dissolved solids, and a good unit balances minerals back afterwards.

For arsenic-affected groundwater, an RO purifier rated for your local TDS, with output verified by testing, is the practical answer. To understand how the technologies differ, see our RO vs UV vs UF guide; for the related contaminants in groundwater, see our fluoride guide.

Live in an arsenic-affected belt? Check the live, government-sourced reading for your pincode, then match an RO purifier rated for it.

Check Your Water Quality →

Why Boon Removes Heavy Metals Safely

Boon is a water-technology company founded by ex-IIT Kanpur engineers and backed by the Technology Development Board (Government of India), NITI Aayog and Roca, with systems serving more than 4,000 organisations worldwide. Its home purifiers, Boon Tap and Boon Tall, are built for the high-TDS groundwater of India’s arsenic and fluoride belts.

8-Stage UltraOsmosis Rated to 2,000 ppm

Boon’s 8-stage UltraOsmosis process removes dissolved arsenic, lead and other heavy metals along with fluoride, nitrate and dissolved solids, then balances minerals back so the water is safe and pleasant. Boon Tall is rated for input up to 2,000 ppm TDS, suited to the heavy groundwater of the eastern river plains.

WaterAI Monitoring

For contaminants you cannot see, knowing your purifier is working matters. Boon’s WaterAI app tracks input and output water quality and filter health in real time and alerts you when a filter genuinely needs changing. WaterAI won the iF Design Award 2026.

Free Professional Installation

Boon’s technicians measure your input water, install the unit and verify output quality at no extra cost, so the purifier is matched to your real water from day one and you can confirm arsenic and heavy metals are being removed.

Remove arsenic and heavy metals the reliable way: Boon’s 8-stage UltraOsmosis, rated to 2,000 ppm, with mineral balancing, WaterAI monitoring, and free professional installation.

Explore Boon Tall →

Frequently Asked Questions

What is the safe limit for arsenic in drinking water in India?

Under BIS IS 10500, the acceptable limit for arsenic is 0.01 mg/L, which is 10 micrograms per litre, the same as the WHO guideline. This is a very low threshold because arsenic is a cumulative toxin with no safe casual level. Where no alternative source exists, BIS allows a permissible maximum of 0.05 mg/L, but the goal should always be to get as close to zero as possible.

Why is arsenic in drinking water so dangerous?

Arsenic is dangerous because it is a cumulative poison with no taste, colour or smell, so people drink contaminated water for years unknowingly. Long-term exposure causes arsenicosis, with skin lesions and pigmentation changes, and raises the risk of skin, bladder and lung cancers, along with cardiovascular and developmental effects. Because the damage builds up slowly and silently, arsenic is one of the most serious water contaminants in India’s affected belts.

Which areas of India have high arsenic in groundwater?

Arsenic contamination is concentrated in the Ganga and Brahmaputra river plains. The worst-affected areas include West Bengal, Bihar, Uttar Pradesh, Jharkhand and Assam, with additional pockets in other states. It is a natural geological contamination of groundwater rather than an industrial one, which is why it follows the river basins and affects borewell-dependent communities.

Does boiling or UV remove arsenic and heavy metals from water?

No. Boiling does not remove arsenic or heavy metals and slightly concentrates them as water evaporates. UV only inactivates microorganisms and does nothing to dissolved metals. Ordinary carbon filters and UF membranes also leave dissolved arsenic and heavy metals largely untouched. The reliable home technology for removing them is reverse osmosis.

How do I remove arsenic from drinking water at home?

The reliable home method is a reverse osmosis purifier. The RO membrane removes dissolved arsenic along with lead, other heavy metals and dissolved solids, and a good unit then balances minerals back for taste and health. If you live in an arsenic-affected belt such as the Ganga or Brahmaputra plains, use an RO purifier rated for your local TDS and have your water tested to confirm the output is safe.

Can heavy metals in water be detected by taste or colour?

Mostly no. Arsenic and lead have no taste, colour or smell, which is why they are so dangerous. Iron is an exception and often gives a metallic taste and rust-coloured staining, but the toxic heavy metals that matter most for health are invisible. The only way to know whether your water contains arsenic or lead is a laboratory test, supported by government groundwater data for your area.

Boon Tall: 8-stage UltraOsmosis rated to 2,000 ppm, with mineral balancing, WaterAI monitoring, and free professional installation. Built to remove arsenic and heavy metals from India’s groundwater.

Shop Boon Tall →

June 26, 2026

Safe Drinking Water for Babies and Children in India: A Parent’s Guide

Every parent worries about what their child eats. Water deserves the same attention. A young child drinks more water relative to their body weight than an adult, and a baby’s developing system is far less able to cope with contaminants. In India, where most drinking water comes from groundwater that can carry nitrate, fluoride, arsenic and bacteria, getting the water right is one of the most important and most overlooked parts of keeping a child healthy.

This guide explains, in plain terms, why children are more vulnerable, what is actually in Indian drinking water, and how to give your family water you can trust. It is general information, not medical advice; for anything specific to your child, follow your paediatrician.

Why Children Are More Vulnerable to Unsafe Water

Children are not small adults when it comes to water safety. Three things make them more sensitive to contaminants:

They drink more for their size. Relative to body weight, an infant can consume far more water than an adult, so any contaminant is delivered in a higher effective dose.
Their organs are still developing. A baby’s kidneys, gut and blood system are immature, which makes them especially sensitive to substances like nitrate and lead.
The effects can be long term. Exposure to fluoride, arsenic or lead during the growing years can affect teeth, bones and development in ways that are hard to reverse.

This is why water that an adult might tolerate is not automatically fine for a child, and why infant formula in particular needs water that is genuinely clean.

The Real Risks in Indian Drinking Water for Kids

Most of India depends on groundwater, and groundwater is where the contaminants that matter most for children show up. None of these can be seen, smelled or tasted, which is exactly why they are dangerous: the water looks perfectly clear.

Nitrate and Blue Baby Syndrome

Nitrate is the single biggest water risk specific to infants. High nitrate causes methemoglobinemia, known as blue baby syndrome, where the blood cannot carry oxygen properly in babies under six months. Nitrate seeps into borewell and groundwater from fertilisers and sewage, so it is common in areas near farmland. The BIS limit is 45 mg/L with no relaxation, and the only way to know your level is to test.

Bacteria and Viruses

Microbial contamination causes the diarrhoeal illness that remains a leading threat to young children in India. Leaky pipes, mixed sewage and stored water all introduce bacteria and viruses. A UV stage in a purifier inactivates these organisms.

Fluoride

Excess fluoride causes dental fluorosis, the mottling and pitting of children’s teeth, and in severe long-term cases skeletal fluorosis. The BIS acceptable limit is 1.0 mg/L. Fluoride is naturally high in groundwater across Rajasthan, Gujarat, Andhra Pradesh, Telangana and parts of Karnataka and several other states. Our guide to fluoride in drinking water covers this in detail.

Arsenic and Lead

Arsenic in groundwater, concentrated in the Ganga and Brahmaputra plains, is a long-term toxin with no safe casual level; the BIS limit is just 0.01 mg/L. Lead can enter from old plumbing and fittings and is especially harmful to children’s development. Both are removed effectively by reverse osmosis. See our guide to arsenic and heavy metals in water.

Why Testing Matters

Nitrate, fluoride and arsenic are invisible and tasteless. Two homes in the same neighbourhood can have very different readings depending on whether they draw municipal supply, borewell or tanker water. The only way to know what your child is drinking is to check your actual tap.

Reference: BIS IS 10500 drinking-water standard; CGWB groundwater quality data, Govt. of India

Is RO Water Safe for Babies and Children?

Yes, and for groundwater-fed Indian homes it is usually the safest practical option. Reverse osmosis pushes water through a fine membrane that removes the dissolved contaminants that matter most for children: nitrate, fluoride, arsenic, lead and excess dissolved solids. Paired with a UV stage, it also inactivates bacteria and viruses. No home boiling or basic filter does all of this.

The common worry is that RO strips out healthy minerals too. Good RO purifiers solve this by balancing minerals back after purification, so the water your child drinks is clean and still contains calcium and magnesium at sensible levels. We cover this fully in is RO water safe to drink. The practical position is simple: for Indian groundwater, the risks RO removes far outweigh the small mineral adjustment it makes, and mineral balancing closes that gap.

The takeaway: for most Indian homes on groundwater, RO with a UV stage and mineral balancing is the safest everyday water for babies and children, because it removes nitrate, fluoride, arsenic and lead while keeping the water pleasant and mineral-balanced.

Water for Infant Formula: What to Do

Formula deserves special care because infants under six months are the most vulnerable group of all.

Start with purified water. Use water from an RO and UV purifier so nitrate, arsenic and dissolved contaminants are already removed.
Boil and cool, if advised. Many paediatricians recommend boiling the purified water and cooling it to a safe temperature before mixing formula, as an added safeguard against any contamination introduced after purification. Follow your doctor’s guidance for your baby’s age.
Use clean, sterilised bottles. Even the best water is undone by an unclean bottle.
Make it fresh. Prepare feeds as needed rather than storing mixed formula for long periods.

The order matters: purify first to remove what boiling cannot, then boil for the microbial safeguard. Boiling alone does not remove nitrate, fluoride or arsenic; in fact it slightly concentrates them as water evaporates.

Boiled vs Bottled vs RO Water for Children

Parents usually weigh three options. Here is how they compare for daily use.

Method	Removes Bacteria	Removes Nitrate / Fluoride / Arsenic	Everyday Practicality
Boiling only	Yes	No (slightly concentrates them)	Time-consuming; no chemical safety
Bottled water	Usually	Varies by brand	Expensive, plastic-heavy, inconsistent
RO + UV purifier	Yes (UV)	Yes (RO)	Consistent, low cost per litre, no plastic

Boiling handles germs but not chemistry. Bottled water is fine for travel but costly and wasteful as a daily habit, and quality varies. An RO and UV purifier is the only option that covers both the microbial and the chemical risks consistently, at a low cost per litre. For the full cost picture, see our true cost of ownership guide.

Not sure what is in your family’s water? Check the live, government-sourced reading for your pincode before you decide.

Check Your Water Quality →

How to Choose a Purifier for a Family with Young Children

For a household with babies or young children, prioritise these features:

Reverse osmosis with a UV stage, so both dissolved contaminants and microorganisms are handled.
Mineral balancing, so purified water is healthy and pleasant rather than flat.
A membrane rated for your water. If you are on borewell or high-TDS supply, the unit must be specified for it. Check your borewell water level first.
Real-time monitoring, so you replace filters based on actual water quality, not guesswork, and never unknowingly serve under-filtered water.
Professional installation, so the purifier is matched and verified against your real tap from day one.

Why Boon Is Built for Family Drinking Water

Boon is a water-technology company founded by ex-IIT Kanpur engineers and backed by the Technology Development Board (Government of India), NITI Aayog and Roca. Its systems serve more than 4,000 organisations worldwide, and the same engineering goes into its home purifiers, Boon Tap (under-sink) and Boon Tall (freestanding).

8-Stage UltraOsmosis

Both home models use an 8-stage UltraOsmosis process that removes nitrate, fluoride, arsenic, lead and dissolved solids, then balances minerals back to a healthy level, so the water is safe for the whole family and genuinely pleasant to drink.

WaterAI Monitoring

The WaterAI app tracks input and output water quality and filter health in real time, and alerts you when a filter actually needs changing. For a home with young children, that means never unknowingly serving under-filtered water. WaterAI won the iF Design Award 2026.

Free Professional Installation

Boon’s own technicians measure your input water, install the unit and verify output quality, so the purifier is matched to your exact supply from the start. If your water is hard or from a borewell, our hard water guide explains why a properly rated unit such as Boon Tall matters.

Give your family water you can trust: 8-stage UltraOsmosis with RO and UV, mineral balancing, WaterAI monitoring, and free professional installation.

Explore Boon Tap →

Frequently Asked Questions

What is the safest drinking water for babies in India?

For babies, the safest water is free of bacteria, nitrate, lead and dissolved contaminants. In most Indian homes that means water from an RO purifier with a UV stage. For infants under six months, water for formula should be purified and then boiled and cooled, following your paediatrician’s guidance. Plain tap or untreated borewell water is not recommended for infants because of nitrate and bacterial risk.

Is RO water safe for babies and young children?

Yes. RO water is safe when the purifier removes contaminants and then balances minerals back, which good systems do. RO removes nitrate, arsenic, lead and excess fluoride that are especially harmful to infants, and a UV stage inactivates bacteria and viruses. Mineral balancing addresses the concern about RO removing minerals.

Why is nitrate in water dangerous for infants?

High nitrate causes methemoglobinemia, or blue baby syndrome, in infants under six months by reducing the blood’s ability to carry oxygen. The BIS limit is 45 mg/L with no relaxation. Nitrate is common in borewell and groundwater near farmland and has no taste or smell, so it must be tested for. Reverse osmosis removes it effectively.

Should I boil water for my baby if I have an RO purifier?

For infants under six months, many paediatricians still recommend boiling and cooling purified water before preparing formula, as an extra safeguard against contamination introduced after purification. RO with UV already removes chemical and microbial risks from the supply, so for older children purified water is generally sufficient. Always follow your paediatrician’s advice and use sterilised bottles.

Is bottled water safe for children?

Packaged water is generally safe but is an expensive and plastic-heavy way to give children daily water, and quality varies. Bottles stored in heat can leach plastic compounds. For daily home use, a maintained RO and UV purifier gives consistent quality at a fraction of the cost and without the plastic waste. Keep bottled water for travel.

How do I choose a water purifier for a home with young children?

Choose an RO purifier with a UV stage and mineral balancing, sized for your water quality. Check your tap TDS and contaminants first, since borewell and high-TDS supply needs a membrane rated for it. Look for real-time monitoring and professional installation. Boon Tap and Boon Tall both use 8-stage UltraOsmosis with WaterAI monitoring and free professional installation.

Boon home purifiers: 8-stage UltraOsmosis with RO and UV, mineral balancing, WaterAI monitoring, and free professional installation. Safe water for every member of the family.

Shop Boon Purifiers →

June 26, 2026

Chlorine in Tap Water in India: Is It Safe and Should You Remove It?

If your tap water sometimes smells faintly of a swimming pool, that is chlorine, and its presence is not an accident. Municipal water bodies add chlorine on purpose to keep water safe. Yet most people do not enjoy drinking it, and there are good reasons to remove the residual chlorine before it reaches your glass. This guide explains why chlorine is there, whether it is safe, and how to deal with it.

Why There Is Chlorine in Your Tap Water

Chlorine is the workhorse of municipal water treatment. It is added to kill bacteria and viruses at the treatment plant, and crucially it leaves a small residual amount in the water so that it stays disinfected on its long journey through pipes and tanks to your home. Without that residual, water could pick up contamination anywhere along the network.

This is why the Bureau of Indian Standards recommends a minimum free residual chlorine of about 0.2 mg/L at the consumer end when water is chlorinated. In other words, a little chlorine in your tap water is a sign the system is doing its job.

The takeaway: chlorine in tap water is intentional and protective. The small residual keeps water disinfected through the pipes. The reasons to remove it are taste, smell and disinfection byproducts, not acute danger from the chlorine itself.

Is Chlorine in Tap Water Safe?

At the controlled levels used in municipal supply, the chlorine residual is considered safe to drink, and the protection it provides against waterborne disease is significant. So the honest framing is that chlorine is a net positive in the supply network: the disease it prevents far outweighs the risk of the residual itself.

That said, “safe to drink” is not the same as “pleasant to drink” or “ideal.” The taste and smell are off-putting, and there is a secondary concern about what chlorine can form when it reacts with organic matter, which is where most people decide to filter it out at the point of use.

The Downsides: Taste, Smell and Byproducts

There are two practical reasons to remove residual chlorine before drinking:

Taste and smell. The chlorine residual gives water a distinct pool-like odour and a flat, chemical taste that puts many people off drinking enough water at all.
Disinfection byproducts. When chlorine reacts with natural organic matter in water, it can form byproducts such as trihalomethanes. At the low levels of a well-managed supply these are generally considered low risk, but long-term exposure to higher levels is something water guidelines aim to limit, so reducing them is sensible.

Both are addressed by the same simple technology: activated carbon, which adsorbs chlorine and its byproducts and restores a clean taste.

Chlorine vs Groundwater Contaminants

It is worth putting chlorine in context. Chlorine is mainly a municipal-supply issue: it appears in treated piped water. The contaminants that dominate India’s borewell and groundwater are different, things like fluoride, arsenic, nitrate and hardness, which chlorination does not address and which need reverse osmosis.

Many Indian homes receive a mix of municipal and borewell water depending on the season and supply, so the ideal purifier handles both: carbon for chlorine and taste, and RO for the dissolved groundwater contaminants. To see what is actually in your supply, check the live, government-sourced reading for your area.

Two Different Problems

Chlorine is something the water authority adds to keep piped water safe. Fluoride, arsenic and nitrate are things nature or pollution put into groundwater. A good purifier removes the chlorine residual for taste and the dissolved contaminants for safety, in one system.

Reference: BIS IS 10500 (free residual chlorine guidance); CGWB groundwater quality data

How to Remove Chlorine from Drinking Water

Removing chlorine is one of the easier water tasks:

Activated carbon filtration is the standard, effective method. Carbon adsorbs chlorine and byproducts and removes the taste and smell. It is a core stage in modern purifiers.
Letting water stand allows some chlorine to dissipate over time, but it is slow, inconsistent, and does nothing for byproducts or for groundwater contaminants.
Reverse osmosis purifiers include carbon stages before the membrane, partly to protect the membrane from chlorine, so they remove chlorine and taste while also removing dissolved contaminants. This is the most complete option.

For most homes, a purifier that combines carbon stages with RO is the practical answer, because it solves the chlorine taste and the groundwater chemistry together. Our RO vs UV vs UF guide explains how the stages fit together.

Want to know what is in your supply beyond chlorine? Check the live, government-sourced reading for your pincode.

Check Your Water Quality →

How Boon Handles Chlorine and More

Boon is a water-technology company founded by ex-IIT Kanpur engineers and backed by the Technology Development Board (Government of India), NITI Aayog and Roca, with systems serving more than 4,000 organisations worldwide.

8-Stage UltraOsmosis with Carbon Stages

Boon’s 8-stage UltraOsmosis includes activated carbon stages that remove chlorine, its byproducts and the chemical taste, ahead of the RO membrane that removes dissolved groundwater contaminants. So whether your supply is chlorinated municipal water, borewell water or a mix, one system handles it and balances minerals back for a clean taste.

WaterAI Monitoring

The WaterAI app tracks input and output water quality and filter health in real time, so you know the carbon and membrane stages are working. WaterAI won the iF Design Award 2026.

Free Professional Installation

Boon’s technicians install the unit, measure your input water and verify output quality at no extra cost, so the purifier is matched to your real supply from day one.

Clean-tasting, fully treated water: Boon’s 8-stage UltraOsmosis with carbon stages and RO, mineral balancing, WaterAI monitoring, and free professional installation.

Explore Boon Tall →

Frequently Asked Questions

Is chlorine in tap water safe to drink in India?

A small, controlled amount of chlorine is intentional and safe; municipal bodies add it to kill bacteria and viruses and to keep water disinfected through the pipes. The BIS standard recommends a minimum free residual chlorine of about 0.2 mg/L for this reason. The downsides are mainly taste and smell, and the disinfection byproducts that can form when chlorine reacts with organic matter. So chlorine itself is a safety feature, but most people prefer to remove the residual and its byproducts before drinking.

Why does my tap water smell like chlorine?

That swimming-pool smell is residual chlorine left in the water after municipal disinfection. It is a sign the water has been treated, which is good, but the taste and odour are unpleasant and put many people off tap water. The smell is usually harmless at normal municipal levels and is easily removed by an activated carbon filter, a standard stage in modern purifiers.

What are disinfection byproducts and are they harmful?

Disinfection byproducts, such as trihalomethanes, form when chlorine reacts with natural organic matter in water. At the low levels found in well-managed supplies they are generally considered low risk, but long-term exposure to higher levels is something water guidelines aim to limit. Activated carbon reduces chlorine and these byproducts, and reverse osmosis provides a further barrier, which is why a purifier with both is sensible for chlorinated water.

How do I remove chlorine from drinking water?

The simplest and most effective home method is an activated carbon filter, which adsorbs chlorine and improves taste and smell. Letting water stand allows some chlorine to dissipate but is slow, inconsistent and does nothing for byproducts. Modern purifiers include carbon stages, and an RO purifier adds a further barrier while removing dissolved contaminants, so a single purifier handles chlorine, its byproducts and the rest of your water quality.

Does an RO purifier remove chlorine?

Yes. RO purifiers include activated carbon stages that remove chlorine and improve taste before the water reaches the membrane, partly to protect the membrane itself. The combination of carbon filtration and the RO membrane removes residual chlorine and disinfection byproducts along with dissolved contaminants such as fluoride, arsenic, nitrate and hardness. Boon’s 8-stage UltraOsmosis includes carbon stages for exactly this purpose.

Boon home purifiers: 8-stage UltraOsmosis with carbon stages and RO, mineral balancing, WaterAI monitoring, and free professional installation. Clean taste, fully treated water.

Shop Boon Purifiers →

June 26, 2026

Fluoride in Drinking Water in India: Safe Limits, Health Effects and How to Remove It

Fluoride is one of the most misunderstood things in drinking water. A little of it protects teeth, which is why it is added to toothpaste. But too much of it, which is exactly the situation across large parts of India, quietly damages teeth and bones over years. The difference between helpful and harmful is a very small number, and that is what makes fluoride worth understanding properly.

This guide explains what fluoride is, how much is safe under Indian standards, what excess does to health, where in India it is a problem, and how to remove it from the water you drink.

What Is Fluoride and Why It Is in Water

Fluoride is a natural compound found in rocks and soil. As groundwater sits in contact with fluoride-bearing rock, the fluoride dissolves into it. This is why fluoride is overwhelmingly a groundwater problem: borewells and deep wells in certain geological belts draw water that has picked up high fluoride naturally, with no industrial source involved.

Because it is geological, fluoride is intensely local and tends to be persistent. A region sitting on fluoride-rich rock will show high fluoride year after year, which is why it has become a long-term public-health issue in the affected belts.

How Much Fluoride Is Safe?

Under the Bureau of Indian Standards (BIS IS 10500), the limits for fluoride in drinking water are:

Acceptable limit: 1.0 mg/L
Permissible maximum: 1.5 mg/L (in the absence of an alternate source)

What makes fluoride unusual is the narrow safe window. Unlike most contaminants, where less is simply better, a small amount of fluoride is beneficial for teeth. But the margin is slim: cross roughly 1.5 mg/L and the balance tips towards harm. Much of India’s affected groundwater sits not just over the limit but several times above it, which is where serious health damage begins.

The takeaway: the safe range for fluoride is small, between roughly 1.0 and 1.5 mg/L. Below that it helps teeth; above it, the risk of fluorosis rises steadily. With fluoride, the precise level in your water is what counts.

The Health Effects of Excess Fluoride

Excess fluoride causes a condition called fluorosis, which appears in two main forms.

Dental Fluorosis

The earliest and most common sign is dental fluorosis: white flecks, then yellow-brown staining, and in worse cases pitting and roughening of the tooth enamel. It is most damaging while children’s permanent teeth are still forming, which is why fluoride matters so much for families with young children, as covered in our guide to safe drinking water for children.

Skeletal Fluorosis

Prolonged exposure to higher fluoride levels causes skeletal fluorosis, where fluoride accumulates in bones, making them stiff, painful and brittle. In severe, long-term cases it damages joints and the spine and can be disabling. This is the most serious consequence of the high-fluoride belts in India, and it is the reason a national programme exists to prevent and control fluorosis.

A National Concern

Fluorosis from drinking water is recognised as a significant public-health problem across many Indian states, which is why the Government of India runs a dedicated National Programme for Prevention and Control of Fluorosis. The contamination is natural and geological, not industrial, and it persists year after year in affected belts.

Reference: BIS IS 10500; CGWB groundwater quality data; Govt. of India fluorosis programme

Where Fluoride Is High in India

High fluoride in groundwater has been recorded across a large number of states. The most affected belts include:

Region	Status	Notes
Rajasthan	Severely affected	One of India’s worst fluoride belts; widespread across districts
Gujarat	Widely affected	High fluoride paired with high hardness and TDS in groundwater
Andhra Pradesh and Telangana	Severely affected	Long-recognised endemic fluorosis areas
Karnataka and Tamil Nadu	Affected pockets	Concentrated in groundwater-dependent districts
Madhya Pradesh, UP, Bihar	Affected pockets	Localised high-fluoride zones in groundwater belts
Punjab and Haryana	Affected pockets	Often alongside high salinity and nitrate

The pattern is regional but patchy: within an affected state, some areas are perfectly fine and others are several times over the limit. To see the live, government-sourced reading for your city, open your water quality report, for example Hyderabad water quality or Ahmedabad water quality. Fluoride also frequently travels with hardness in borewell water, so our borewell water guide is a useful companion read.

How to Know If Your Water Has Fluoride

You cannot taste, see or smell fluoride, so the only way to know is to find out:

Check government groundwater data for your district as a first guide to whether fluoride is likely in your area.
Get a laboratory test. Send a sample to a NABL-accredited lab for a fluoride test, especially if you are on borewell or groundwater in an affected state.
Watch for community signs. Visible fluorosis staining on teeth in the local population is a strong warning that fluoride in the area is high.

Because fluoride is invisible, families in affected belts often only discover the problem once dental fluorosis appears in children, by which point exposure has been going on for years. Testing early is the sensible course.

How to Remove Fluoride from Drinking Water

This is where many common assumptions are wrong, so it is worth being precise:

Boiling does not remove fluoride. It concentrates it slightly, because only water evaporates.
Carbon filters and UV do not remove fluoride. Carbon improves taste and removes chlorine; UV inactivates microbes. Neither touches dissolved fluoride.
Activated alumina and bone char can reduce fluoride but need careful, regular maintenance and are not practical for most homes.
Reverse osmosis is the reliable home method. The RO membrane physically removes dissolved fluoride along with other dissolved solids, and a good unit then balances minerals back for taste and health.

For fluoride-affected groundwater, an RO purifier rated for your local TDS is the practical, lasting answer. To understand how the technologies differ, see our RO vs UV vs UF guide, and for the dissolved-solids number itself, our guide to TDS and BIS limits.

Live in a fluoride-affected area? Check the live, government-sourced reading for your pincode, then match an RO purifier rated for it.

Check Your Water Quality →

Why Boon Removes Fluoride Safely

Boon is a water-technology company founded by ex-IIT Kanpur engineers and backed by the Technology Development Board (Government of India), NITI Aayog and Roca, with systems serving more than 4,000 organisations worldwide. Its home purifiers, Boon Tap and Boon Tall, are built for exactly the high-fluoride, high-TDS groundwater that affects much of India.

8-Stage UltraOsmosis Rated for High Groundwater Load

Boon’s 8-stage UltraOsmosis process removes dissolved fluoride along with arsenic, nitrate, hardness and other dissolved solids, then balances minerals back so the water is safe and pleasant. Boon Tall is rated for input up to 2,000 ppm TDS, which suits the heavy groundwater of fluoride belts such as Rajasthan, Gujarat and the Telugu states.

WaterAI Monitoring

Boon’s WaterAI app tracks input and output water quality and filter health in real time, so you can see that fluoride and other contaminants are being handled rather than trusting a fixed schedule. WaterAI won the iF Design Award 2026.

Free Professional Installation

Boon’s technicians measure your input water, install the unit and verify output quality at no extra cost, so the purifier is matched to your real fluoride and TDS levels from day one.

Remove fluoride the reliable way: Boon’s 8-stage UltraOsmosis, rated to 2,000 ppm, with mineral balancing, WaterAI monitoring, and free professional installation.

Explore Boon Tall →

Frequently Asked Questions

How much fluoride in drinking water is safe in India?

Under BIS IS 10500, the acceptable limit for fluoride is 1.0 mg/L and the permissible maximum is 1.5 mg/L. A small amount helps dental health, but the safe window is narrow: above about 1.5 mg/L the risk of dental fluorosis rises, and prolonged exposure to higher levels causes skeletal fluorosis. Because the gap between beneficial and harmful is so small, the exact number in your water matters.

What are the health effects of too much fluoride in water?

Excess fluoride causes fluorosis. Dental fluorosis shows up as white patches, yellow-brown staining and pitting of teeth, and is most damaging while children’s teeth are forming. Long-term exposure to higher levels causes skeletal fluorosis, which stiffens and damages bones and joints and can be disabling. India runs a national programme to prevent and control fluorosis because it is so widespread in groundwater.

Which states in India have high fluoride in groundwater?

High fluoride has been recorded across many states, including Rajasthan, Gujarat, Andhra Pradesh, Telangana, Karnataka, Madhya Pradesh, Uttar Pradesh, Bihar, Punjab, Haryana and Tamil Nadu. It is concentrated in areas dependent on deep groundwater, where fluoride leaches naturally from rock. Levels vary sharply by location, so even within an affected state some areas are fine and others are well above the limit.

Does boiling water remove fluoride?

No. Boiling does not remove fluoride. Because fluoride is dissolved and boiling only evaporates water, boiling actually concentrates fluoride slightly. Ordinary carbon filters and UV purifiers do not remove it either. The reliable home method for removing fluoride is reverse osmosis, whose membrane physically separates fluoride from the water.

How do I remove fluoride from drinking water at home?

The most reliable home method is a reverse osmosis purifier. The RO membrane removes dissolved fluoride along with other dissolved solids, and a good unit then balances minerals back for taste and health. Activated alumina and bone-char filters can also reduce fluoride but need careful maintenance and are less practical for homes. For most Indian households in fluoride-affected areas, an RO purifier rated for the local TDS is the right solution.

Can I tell if my water has fluoride by taste?

No. Fluoride has no taste, colour or smell at drinking-water levels, so you cannot detect it without testing. If you live in a fluoride-affected region, especially one dependent on borewell or groundwater, get a laboratory test and check government groundwater data for your area. Visible fluorosis staining on teeth in the community is a warning sign that local fluoride may be high.

Boon Tall: 8-stage UltraOsmosis rated to 2,000 ppm, with mineral balancing, WaterAI monitoring, and free professional installation. Built to remove fluoride from India’s hardest groundwater.

Shop Boon Tall →

June 26, 2026

Is Borewell Water Safe to Drink in India? What You Need to Know

Borewell water keeps a huge part of India supplied, from independent houses and apartment complexes to entire neighbourhoods where municipal supply does not reach or is not enough. It is convenient and often free at the point of use. But the question every household on a borewell eventually asks is a fair one: is borewell water actually safe to drink?

The short answer is that it usually is not, at least not without treatment. This guide explains why, what borewell water typically contains, how to find out what is in yours, and how to make it genuinely safe for your family.

What Is Borewell Water and Why So Many Rely on It

A borewell draws water from deep underground, from an aquifer below the surface. India depends on groundwater for roughly two-thirds of its drinking water, and borewells are how most of that is reached. In cities with patchy municipal supply, in new sectors and high-rises, and across rural India, the borewell is the everyday source.

The trouble is that groundwater is also where dissolved contamination is highest. Surface water picks up less on its way to you; groundwater sits in contact with rock and soil and dissolves whatever is there, which varies enormously by location.

Is Borewell Water Safe to Drink?

In most of India, borewell water is not safe to drink directly. The honest, complete answer has a few parts.

It almost always looks clear and often tastes normal, which is exactly the problem: the contaminants that matter most in groundwater are invisible and tasteless. Borewell water is typically high in TDS and hardness, and depending on the region it can carry fluoride, arsenic, nitrate, iron and bacteria. Some of these, like nitrate and arsenic, are serious health risks even though you cannot see or taste them.

Quality also varies sharply, from one street to the next and from season to season as the water table rises and falls. So borewell water that is fine in one home may be unsafe a kilometre away, and water that is acceptable after the monsoon may worsen in the dry months. This is why a blanket “it is fine” or “it is dangerous” is wrong: the only correct answer is to test your specific borewell and treat accordingly.

The takeaway: borewell water should be treated as untreated raw water. It is usually high in TDS and hardness and can carry fluoride, arsenic, nitrate, iron and bacteria. Test it, then treat it with reverse osmosis before drinking.

What Is Actually in Borewell Water

Here is what borewell water commonly carries in India, and why each matters.

What’s in it	BIS Acceptable Limit	Why It Matters
TDS (total dissolved solids)	500 mg/L	Borewell water often runs 800 to 2,000+ mg/L; affects taste and signals heavy dissolved load
Total hardness	200 mg/L	Causes scaling and a flat taste; very common in borewell belts
Fluoride	1.0 mg/L	Excess causes dental and skeletal fluorosis; high across Rajasthan, AP, Telangana and more
Arsenic	0.01 mg/L	Long-term toxin; concentrated in the Ganga and Brahmaputra plains
Nitrate	45 mg/L	Causes blue baby syndrome in infants; seeps in from fertiliser and sewage
Iron	0.3 mg/L	Causes a metallic taste, staining and turbidity; common in coastal and eastern belts
Bacteria	Should be absent	Can enter from shallow wells, leaks and contamination near the bore

Hardness and TDS are nearly universal in borewell water. The chemical contaminants are regional: fluoride dominates the western and southern groundwater belts, while arsenic is concentrated in the eastern river plains. Nitrate appears anywhere groundwater sits near farmland, which makes it especially relevant for homes with young children, as our guide to safe drinking water for children explains.

The India Picture

Government groundwater surveys repeatedly flag elevated hardness, fluoride, arsenic, nitrate and iron across India’s borewell-dependent districts. Because the contamination is so local, your district’s profile and your own tap can differ, which is why testing your specific borewell matters.

Source: CGWB Annual Ground Water Quality Report and India-WRIS, Govt. of India; BIS IS 10500

How to Test Your Borewell Water

You cannot judge borewell water by sight or taste, so testing is essential. Work through it in order of effort:

Check a TDS reading. Most purifier brands measure your tap TDS free during a pre-installation visit. It is a quick first signal of how heavy the dissolved load is.
Look up government data for your area. Use it as a guide to which contaminants are likely in your district. See the live, government-sourced reading for your city on our water quality checker.
Send a sample to a NABL-accredited lab. For a complete picture, get hardness, fluoride, arsenic, nitrate, iron and bacteriological tests done. This is worth doing once when you move in or install a purifier.

Because borewell quality shifts with the seasons, a one-time reading is a snapshot, not a guarantee. Ongoing monitoring is the way to stay matched to the real supply.

Can You Make Borewell Water Safe to Drink?

Yes, and the reliable way to do it is reverse osmosis. An RO purifier pushes water through a semi-permeable membrane whose pores block dissolved solids, hardness minerals, fluoride, arsenic and nitrate, while letting water through. Paired with a UV stage, it also inactivates bacteria and viruses. A good unit then balances minerals back so the water is pleasant and healthy.

This combination is what borewell water needs, because no single simpler method covers the full range of what borewell water carries. For the underlying technology comparison, see our RO vs UV vs UF guide, and to understand the TDS number itself, read our guide to TDS and BIS limits.

Why RO, Not Boiling or UV Alone

It is worth being clear about why the simpler options fall short for borewell water:

Boiling kills bacteria and reduces temporary hardness, but does nothing for TDS, fluoride, arsenic or nitrate, and slightly concentrates them as water evaporates.
UV inactivates microorganisms but leaves every dissolved contaminant untouched, so high-TDS borewell water stays high in TDS.
UF blocks particles and bacteria through a physical filter, but its pores are too large to stop dissolved hardness, fluoride, arsenic or nitrate.
RO is the only home technology that removes the dissolved contaminants borewell water carries, which is why it is the right choice for groundwater. If your water is also very hard, our hard water guide goes deeper.

On a borewell? Check the live, government-sourced reading for your pincode, then match a purifier rated for it.

Check Your Water Quality →

Why Boon Tall Is Built for Borewell Water

Boon Tall is designed for exactly the high-TDS, high-hardness water that borewells deliver. It comes from Boon, the water-technology company founded by ex-IIT Kanpur engineers and backed by the Technology Development Board (Government of India), NITI Aayog and Roca, whose systems serve more than 4,000 organisations worldwide.

8-Stage UltraOsmosis Rated to 2,000 ppm

Boon Tall handles input up to 2,000 ppm TDS, so even very heavy borewell supply is brought within a safe, palatable range, with fluoride, arsenic, nitrate and hardness removed and minerals balanced back.

60 LPH So Volume Is Never a Problem

Borewell households often run high volumes. At 60 litres per hour, Boon Tall refills quickly, so peak demand never leaves you waiting at the tap.

WaterAI Monitoring for Water That Changes

Because borewell quality shifts with the seasons, a fixed filter schedule is guesswork. Boon’s WaterAI app tracks input and output water quality and filter health in real time and alerts you when a filter genuinely needs changing. WaterAI won the iF Design Award 2026.

Free Professional Installation

Boon’s technicians measure your borewell input, install the unit, verify output quality and check every connection at no extra cost, so the purifier is matched to your real water from day one.

Why Boon Tall works for borewell water: a membrane rated to 2,000 ppm for the heaviest supply, 60 LPH so volume is never a problem, WaterAI to manage water that changes through the year, and free expert installation that confirms the fit to your exact tap.

Make your borewell water safe to drink: Boon Tall, 8-stage UltraOsmosis rated to 2,000 ppm, 60 LPH, WaterAI monitoring, and free professional installation.

Explore Boon Tall →

Frequently Asked Questions

Is borewell water safe to drink in India?

In most parts of India, borewell water is not safe to drink directly without treatment. Because it is drawn from underground, it is usually high in dissolved solids and hardness and can carry fluoride, arsenic, nitrate, iron and bacteria. It often looks clear and tastes normal even when contaminated, so it should be tested and then treated with a reverse osmosis purifier before drinking.

Why is borewell water high in TDS and hardness?

As rainwater filters down through soil and rock, it dissolves minerals such as calcium, magnesium, fluoride and salts. By the time it reaches the aquifer a borewell taps, it can carry several hundred to a few thousand milligrams of dissolved solids per litre. That is why borewell water is typically far higher in TDS and hardness than surface or municipal supply, and why it usually needs reverse osmosis.

Can I drink borewell water after boiling it?

Boiling only kills bacteria and reduces temporary hardness. It does not remove TDS, fluoride, arsenic, nitrate or most dissolved contaminants, and it slightly concentrates them as water evaporates. So boiling alone does not make borewell water safe to drink. For dissolved contaminants you need a reverse osmosis purifier, ideally with a UV stage.

Which water purifier is best for borewell water?

Choose a reverse osmosis purifier with a membrane rated for high TDS, ideally up to 2,000 ppm, paired with a UV stage and mineral balancing. RO removes the dissolved solids, hardness, fluoride, arsenic and nitrate; UV handles bacteria; mineral balancing keeps the water pleasant. Boon Tall is built for this, with 8-stage UltraOsmosis rated to 2,000 ppm, 60 litres per hour and WaterAI monitoring.

How do I test my borewell water quality?

Start with a TDS reading, which most purifier brands measure free during a pre-installation visit, and check government groundwater data for your area as a guide. For a full picture, send a sample to a NABL-accredited laboratory for hardness, fluoride, arsenic, nitrate, iron and bacteriological tests. Because borewell quality varies by location and season, testing your own borewell is the only reliable way to know what you are drinking.

Does borewell water quality change with the seasons?

Yes. Borewell water quality can change through the year as the water table rises and falls. TDS, hardness, nitrate and other contaminants often shift between the dry season and after the monsoon. This is why real-time monitoring is useful: it tracks your actual input water rather than assuming a fixed value, so your purifier and filter schedule stay matched to the real supply.

Boon Tall: 8-stage UltraOsmosis rated to 2,000 ppm, 60 LPH, WaterAI monitoring, and free professional installation. Built for India’s borewell and high-TDS water.

Shop Boon Tall →

June 26, 2026

Arsenic and Heavy Metals in Drinking Water in India: Risks, Hotspots and How to Remove Them

Of all the things that can be in drinking water, arsenic is among the most feared, and for good reason. It is invisible, tasteless and odourless, it accumulates in the body over years, and in parts of India it sits in the groundwater that millions of people drink every day. Lead and other heavy metals carry similar risks. This guide explains what these contaminants are, why they are so serious, where in India they are concentrated, and how to remove them from the water you drink.

This is general information, not medical advice. If you live in an affected area and have health concerns, consult a doctor and have your water tested.

What Are Arsenic and Heavy Metals in Water?

Arsenic is a naturally occurring element found in the earth’s crust. In India’s affected belts it leaches from sediment into groundwater, so the contamination is natural and geological rather than industrial, which is why it follows the river basins. Heavy metals such as lead, mercury, cadmium and chromium can enter water both naturally and from industrial discharge, old plumbing and fittings, or contaminated land.

What these contaminants share is that they are toxic at very low concentrations and that the body cannot easily get rid of them. They build up over time, which is why the safe limits are tiny and why long-term exposure is the real danger.

Why Arsenic Is So Dangerous

Arsenic is dangerous for three reasons that combine badly.

First, it is completely undetectable by sight, taste or smell, so contaminated water looks and tastes perfectly normal. People drink it for years without any warning.

Second, it is a cumulative toxin. There is no safe casual level; the harm comes from steady, long-term intake. The BIS limit is just 0.01 mg/L (10 micrograms per litre), matching the World Health Organization guideline, precisely because even small amounts add up.

Third, the health effects are severe. Long-term arsenic exposure causes arsenicosis, with characteristic skin lesions and pigmentation changes, and significantly raises the risk of skin, bladder and lung cancers. It is also linked to cardiovascular disease and to developmental harm, which makes it especially concerning for children, as our guide to safe drinking water for children discusses.

The takeaway: arsenic is invisible, cumulative and seriously toxic, with a BIS limit of just 0.01 mg/L. In affected areas, the only safe assumption is that untreated groundwater may carry it, and the only way to be sure is to test and treat.

Where Arsenic Is High in India

Arsenic contamination in India follows the great river plains, where the sediment carries arsenic into the groundwater. The most affected regions are:

Region	Status	Notes
West Bengal (Ganga delta)	Severely affected	One of the world’s most studied arsenic-affected regions
Bihar (Gangetic plain)	Severely affected	Widespread contamination along the river belt
Uttar Pradesh (eastern districts)	Affected	Concentrated in the Gangetic floodplain
Jharkhand and Assam	Affected pockets	Along the Ganga and Brahmaputra systems
Other river-plain pockets	Localised	Scattered hotspots in several states

Because the contamination is geological and tied to the river systems, it affects borewell-dependent communities across these belts. To see the live, government-sourced reading for your city, open your water quality report, for example Kolkata water quality. Arsenic also commonly appears alongside high TDS and other contaminants in groundwater, so our borewell water guide is a useful companion read.

A Government Priority

Arsenic in groundwater is tracked in the CGWB Annual Ground Water Quality Report and is the focus of dedicated mitigation efforts in the worst-affected states. As with fluoride, the contamination is natural, persistent and concentrated in specific geological belts, so the reading for your exact location is what matters.

Source: CGWB Annual Ground Water Quality Report and India-WRIS, Govt. of India; BIS IS 10500; WHO guideline 10 ug/L

Other Heavy Metals to Know About

Arsenic is the headline, but a few other contaminants belong in the same conversation:

Lead (BIS limit 0.01 mg/L): can leach from old pipes, solder and brass fittings. It is especially harmful to children’s brain development, so it matters even where the supply itself is clean but the plumbing is old.
Iron (BIS limit 0.3 mg/L): not a toxic heavy metal in the way arsenic and lead are, but very common in eastern and coastal groundwater. It causes a metallic taste, rust-coloured staining and turbidity.
Mercury, cadmium and chromium: rarer, usually linked to industrial discharge or contaminated land, and toxic at low levels.

The good news is that the same technology that removes arsenic also removes lead and these other dissolved metals, so a single correct solution covers the whole group.

How to Know If Your Water Has Arsenic or Heavy Metals

Since arsenic and lead are invisible and tasteless, testing is the only way to be sure:

Check government groundwater data for your district to know whether arsenic is likely in your area. See the live reading for your city on our water quality checker.
Get a laboratory test from a NABL-accredited lab for arsenic and heavy metals, especially if you are on borewell or groundwater in the Ganga or Brahmaputra belts.
Consider your plumbing for lead specifically: very old fittings and solder are the usual source, independent of the supply.

If you are in a known arsenic belt, do not wait for symptoms; arsenicosis appears only after years of exposure, by which point significant intake has already occurred.

How to Remove Arsenic and Heavy Metals

As with fluoride, the simpler methods do not work for arsenic and heavy metals:

Boiling does not remove arsenic or heavy metals and slightly concentrates them as water evaporates.
UV only inactivates microorganisms and does nothing to dissolved metals.
Carbon filters and UF leave dissolved arsenic and heavy metals largely untouched.
Reverse osmosis is the reliable home technology: its membrane physically removes dissolved arsenic, lead and other heavy metals along with dissolved solids, and a good unit balances minerals back afterwards.

For arsenic-affected groundwater, an RO purifier rated for your local TDS, with output verified by testing, is the practical answer. To understand how the technologies differ, see our RO vs UV vs UF guide; for the related contaminants in groundwater, see our fluoride guide.

Live in an arsenic-affected belt? Check the live, government-sourced reading for your pincode, then match an RO purifier rated for it.

Check Your Water Quality →

Why Boon Removes Heavy Metals Safely

Boon is a water-technology company founded by ex-IIT Kanpur engineers and backed by the Technology Development Board (Government of India), NITI Aayog and Roca, with systems serving more than 4,000 organisations worldwide. Its home purifiers, Boon Tap and Boon Tall, are built for the high-TDS groundwater of India’s arsenic and fluoride belts.

8-Stage UltraOsmosis Rated to 2,000 ppm

Boon’s 8-stage UltraOsmosis process removes dissolved arsenic, lead and other heavy metals along with fluoride, nitrate and dissolved solids, then balances minerals back so the water is safe and pleasant. Boon Tall is rated for input up to 2,000 ppm TDS, suited to the heavy groundwater of the eastern river plains.

WaterAI Monitoring

For contaminants you cannot see, knowing your purifier is working matters. Boon’s WaterAI app tracks input and output water quality and filter health in real time and alerts you when a filter genuinely needs changing. WaterAI won the iF Design Award 2026.

Free Professional Installation

Boon’s technicians measure your input water, install the unit and verify output quality at no extra cost, so the purifier is matched to your real water from day one and you can confirm arsenic and heavy metals are being removed.

Remove arsenic and heavy metals the reliable way: Boon’s 8-stage UltraOsmosis, rated to 2,000 ppm, with mineral balancing, WaterAI monitoring, and free professional installation.

Explore Boon Tall →

Frequently Asked Questions

What is the safe limit for arsenic in drinking water in India?

Under BIS IS 10500, the acceptable limit for arsenic is 0.01 mg/L, which is 10 micrograms per litre, the same as the WHO guideline. This is a very low threshold because arsenic is a cumulative toxin with no safe casual level. Where no alternative source exists, BIS allows a permissible maximum of 0.05 mg/L, but the goal should always be to get as close to zero as possible.

Why is arsenic in drinking water so dangerous?

Arsenic is dangerous because it is a cumulative poison with no taste, colour or smell, so people drink contaminated water for years unknowingly. Long-term exposure causes arsenicosis, with skin lesions and pigmentation changes, and raises the risk of skin, bladder and lung cancers, along with cardiovascular and developmental effects. Because the damage builds up slowly and silently, arsenic is one of the most serious water contaminants in India’s affected belts.

Which areas of India have high arsenic in groundwater?

Arsenic contamination is concentrated in the Ganga and Brahmaputra river plains. The worst-affected areas include West Bengal, Bihar, Uttar Pradesh, Jharkhand and Assam, with additional pockets in other states. It is a natural geological contamination of groundwater rather than an industrial one, which is why it follows the river basins and affects borewell-dependent communities.

Does boiling or UV remove arsenic and heavy metals from water?

No. Boiling does not remove arsenic or heavy metals and slightly concentrates them as water evaporates. UV only inactivates microorganisms and does nothing to dissolved metals. Ordinary carbon filters and UF membranes also leave dissolved arsenic and heavy metals largely untouched. The reliable home technology for removing them is reverse osmosis.

How do I remove arsenic from drinking water at home?

The reliable home method is a reverse osmosis purifier. The RO membrane removes dissolved arsenic along with lead, other heavy metals and dissolved solids, and a good unit then balances minerals back for taste and health. If you live in an arsenic-affected belt such as the Ganga or Brahmaputra plains, use an RO purifier rated for your local TDS and have your water tested to confirm the output is safe.

Can heavy metals in water be detected by taste or colour?

Mostly no. Arsenic and lead have no taste, colour or smell, which is why they are so dangerous. Iron is an exception and often gives a metallic taste and rust-coloured staining, but the toxic heavy metals that matter most for health are invisible. The only way to know whether your water contains arsenic or lead is a laboratory test, supported by government groundwater data for your area.

Boon Tall: 8-stage UltraOsmosis rated to 2,000 ppm, with mineral balancing, WaterAI monitoring, and free professional installation. Built to remove arsenic and heavy metals from India’s groundwater.

Shop Boon Tall →

June 26, 2026

Category: Water Quality

Is Borewell Water Safe to Drink in India? What You Need to Know

What Is Borewell Water and Why So Many Rely on It

Is Borewell Water Safe to Drink?

What Is Actually in Borewell Water

How to Test Your Borewell Water

Can You Make Borewell Water Safe to Drink?

Why RO, Not Boiling or UV Alone

Why Boon Tall Is Built for Borewell Water

8-Stage UltraOsmosis Rated to 2,000 ppm

60 LPH So Volume Is Never a Problem

WaterAI Monitoring for Water That Changes

Free Professional Installation

Frequently Asked Questions

Is borewell water safe to drink in India?

Why is borewell water high in TDS and hardness?

Can I drink borewell water after boiling it?

Which water purifier is best for borewell water?

How do I test my borewell water quality?

Does borewell water quality change with the seasons?

Safe Drinking Water for Babies and Children in India: A Parent’s Guide

Why Children Are More Vulnerable to Unsafe Water

The Real Risks in Indian Drinking Water for Kids

Nitrate and Blue Baby Syndrome

Bacteria and Viruses

Fluoride

Arsenic and Lead

Is RO Water Safe for Babies and Children?

Water for Infant Formula: What to Do

Boiled vs Bottled vs RO Water for Children

How to Choose a Purifier for a Family with Young Children

Why Boon Is Built for Family Drinking Water

8-Stage UltraOsmosis

WaterAI Monitoring

Free Professional Installation

Frequently Asked Questions

What is the safest drinking water for babies in India?

Is RO water safe for babies and young children?

Why is nitrate in water dangerous for infants?

Should I boil water for my baby if I have an RO purifier?

Is bottled water safe for children?

How do I choose a water purifier for a home with young children?

Fluoride in Drinking Water in India: Safe Limits, Health Effects and How to Remove It

What Is Fluoride and Why It Is in Water

How Much Fluoride Is Safe?

The Health Effects of Excess Fluoride

Dental Fluorosis

Skeletal Fluorosis

Where Fluoride Is High in India

How to Know If Your Water Has Fluoride

How to Remove Fluoride from Drinking Water

Why Boon Removes Fluoride Safely

8-Stage UltraOsmosis Rated for High Groundwater Load

WaterAI Monitoring

Free Professional Installation

Frequently Asked Questions

How much fluoride in drinking water is safe in India?

What are the health effects of too much fluoride in water?

Which states in India have high fluoride in groundwater?

Does boiling water remove fluoride?

How do I remove fluoride from drinking water at home?

Can I tell if my water has fluoride by taste?

Chlorine in Tap Water in India: Is It Safe and Should You Remove It?

Why There Is Chlorine in Your Tap Water

Is Chlorine in Tap Water Safe?

The Downsides: Taste, Smell and Byproducts

Chlorine vs Groundwater Contaminants

How to Remove Chlorine from Drinking Water

How Boon Handles Chlorine and More

8-Stage UltraOsmosis with Carbon Stages

WaterAI Monitoring

Free Professional Installation

Frequently Asked Questions

Is chlorine in tap water safe to drink in India?

Why does my tap water smell like chlorine?

What are disinfection byproducts and are they harmful?

How do I remove chlorine from drinking water?

Does an RO purifier remove chlorine?

Arsenic and Heavy Metals in Drinking Water in India: Risks, Hotspots and How to Remove Them

What Are Arsenic and Heavy Metals in Water?