Water quality report
Water quality in Varanasi
Groundwater near Varanasi has an average TDS of about 499 mg/L — within the BIS safe limit of 500 mg/L. Key concerns: nitrate, hardness.
Source: CGWB Varanasi district brochure (EC-derived), 2013 (Govt. of India). Indicative district-level reading.
- Excellent
- Ideal
- Acceptable
- High
- Severe
- Extreme
- TDS range
- 384–672
- mg/L across points
- Data vintage
- 2013
- CGWB monitoring
- BIS limit
- 500
- mg/L acceptable
- Key concern
- nitrate
- flagged locally
Where 499 mg/L sits
Your area reads Acceptable. BIS rates water up to 500 mg/L as acceptable and 150–300 mg/L as ideal for taste and health.
Against the BIS limits
- TDS in Varanasi
- ~499 mg/L
- BIS acceptable limit
- 500 mg/L
- BIS permissible limit, no other source
- 2,000 mg/L
Varanasi's average is within the acceptable limit. What the two limits mean.
What an RO purifier changes
Varanasi tap today
~499mg/L
After RO purification
~25–50mg/L
An RO membrane typically removes 90–95% of dissolved solids, bringing water into the ideal drinking band. Boon Tap, an under sink RO water purifier, is rated for input water up to 2,000 mg/L and adds minerals back after the membrane, so the water isn’t stripped flat.
What this means for you in Varanasi
Taste
Generally clean and light to drink.
Health
Within safe limits, though local supply can vary by season and building.
Appliances
Low scaling risk on taps and appliances.
What to use
A UV/UF purifier is usually enough; RO with mineral balance still helps.
Other parameters that matter
TDS is one number. These have their own limits in the standard and need their own tests. What each parameter means.
| Parameter | BIS limit | Why it matters |
|---|---|---|
| Bacteriological (E. coli / coliform) | Nil in any 100 ml | Causes stomach infections; needs UV or boiling. |
| Fluoride | 1.0 mg/L (max 1.5) | Excess causes dental & skeletal fluorosis. |
| Arsenic | 0.01 mg/L | Toxic; long-term exposure is carcinogenic. |
| Nitrate | 45 mg/L | Risky for infants (blue-baby syndrome). |
| Iron | 1.0 mg/L | Metallic taste, staining of fixtures & clothes. |
| Total hardness | 200 mg/L (max 600) | Scaling on taps, geysers & appliances. |
Regional watch
Government groundwater surveys have flagged elevated fluoride, arsenic in parts of Uttar Pradesh. If you draw borewell water, get these tested specifically.
Microbiological note
Bacterial safety (E. coli/coliform) is not part of chemical groundwater monitoring, so it needs a lab test of your own tap, and varies with pipe leaks and monsoon. UV purification (built into Boon purifiers) inactivates bacteria and viruses; RO removes the dissolved contaminants above.
Why is TDS like this in Varanasi?
Most Indian cities draw heavily on groundwater, which dissolves minerals and salts from the soil and rock it sits in. Over-extraction, ageing pipes and local geology push dissolved solids (TDS), hardness and sometimes fluoride, nitrate or arsenic above safe limits. City taps often blend treated municipal supply with borewell water, so two buildings on the same street can read very differently — and levels shift with the seasons, usually peaking just before the monsoon. The figure above is an indicative area reading from government monitoring, so your own tap can differ; testing it twice a year is a good habit.
The concern flagged most for Varanasi is nitrate: what nitrate is and its BIS limit.
Read our full guide to TDS & how to reduce it ›How Varanasi compares
Among the cities we map, Varanasi has the 26th lowest average groundwater TDS — within the BIS acceptable limit of 500 mg/L, against a median of 616 mg/L across those cities.
Individual monitoring points around Varanasi range from 384 to 672 mg/L. An average hides that spread, so your own borewell or municipal line can read well above or below 499 mg/L — one more reason to test your actual supply.
Elsewhere in Uttar Pradesh, Agra averages ~1200 mg/L, Aligarh ~919 mg/L, Ghaziabad ~696 mg/L and Kanpur ~650 mg/L.
Nearest cities to Varanasi
Average groundwater TDS, by straight-line distance.
Best fit for Varanasi
Boon Tap
Boon Tap under sink RO water purifier · from ₹23,500
TDS here averages ~499 mg/L (within BIS limits). Boon Tap keeps it safe with mineral balance and real-time monitoring.
Varanasi water — questions
What is the TDS of water in Varanasi?
Groundwater near Varanasi has an average TDS of about 499 mg/L, within the BIS acceptable limit of 500 mg/L, based on government monitoring data (CGWB Varanasi district brochure (EC-derived), 2013). Levels range roughly 384 to 672 mg/L across nearby monitoring points.
Is tap water safe to drink in Varanasi?
TDS around 499 mg/L is within BIS limits, but municipal and borewell supply varies by building and season, so test your own water and use a purifier with monitoring to be sure.
Do I need an RO water purifier in Varanasi?
Possibly not for TDS alone, but an RO purifier with mineral balance still protects against seasonal spikes and other contaminants in Varanasi.
Reports for other cities
Data sources
- CGWB Varanasi district brochure (EC-derived)
- CGWB National Groundwater Quality 2018-2021 (EC-derived TDS)
- CGWB Annual Ground Water Quality Report 2024 (2023 monitoring)
- CGWB district groundwater brochures & state reports (2013-2024)
- CGWB Ground Water Quality (Manual - Chemical Parameters) via India-WRIS National Water Data Portal (station-level, 2015-2023)
- Pincode and locality coordinates: GeoNames postal codes, CC BY 4.0
- India outline: datameet/maps india-composite (CC-0), compiled from LSIB (U.S. Department of State), Alhasan Systems and Natural Earth; follows the Survey of India depiction of India's boundary.
Primary datasets: Central Ground Water Board (CGWB) and India-WRIS, Government of India; limits per BIS IS 10500.
Disclaimer: Figures are indicative area estimates from government groundwater monitoring nearest to this location and may differ from your exact tap or municipal supply. They are not a substitute for a lab test of your own water. This page is general information, not medical advice, and any product suggestion is general guidance based on typical area readings, not a diagnosis of your supply. For health concerns, consult a qualified professional.