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Water quality report

Water quality in Patna

~500mg/L average TDSElevated

Source: CGWB Patna district GW booklet (EC-derived), 2007 (Govt. of India). Indicative district-level reading.

Check your exact pincode
TDS (average)
500 mg/L
Elevated
198–1408 mg/L range · BIS limit 500 mg/L

Where 500 mg/L sits

500
0Ideal 300BIS 50012002000+

Your area reads High. BIS rates water up to 500 mg/L as acceptable and 150–300 mg/L as ideal for taste and health.

What an RO purifier changes

Patna tap today
~500 mg/L
After RO purification
~25–50 mg/L

An RO membrane typically removes 90–95% of dissolved solids, bringing water into the ideal drinking band. Boon purifiers remineralise after RO so the water isn’t stripped flat.

What this means for you in Patna

Taste

Noticeably hard, with a flat or mineral taste.

Health

Above the BIS limit — purification is recommended for regular drinking.

Appliances

Promotes scaling (white deposits) on taps, geysers, kettles and RO membranes.

What to use

A reverse-osmosis (RO) purifier is the right fit here.

Other parameters that matter

TDS is the headline number, but drinking-water safety also depends on these (BIS IS 10500 limits):

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
0.3 mg/L
Metallic taste, staining of fixtures & clothes.
Total hardness
200 mg/L (max 600)
Scaling on taps, geysers & appliances.

Regional watch

The CGWB Annual Ground Water Quality Report (2023 monitoring) flagged nitrate, iron, arsenic above BIS limits at one or more locations in the Patna district. 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 Patna?

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. Read our full guide to TDS & how to reduce it ›

Recommended for your water

Boon Tap

from ₹18,500

TDS here averages ~500 mg/L (within BIS limits). Boon Tap keeps it safe with mineral balance and real-time monitoring.

Explore Boon Tap & check delivery

Compare with other cities

Bhopal~500 mg/L TDSVaranasi~499 mg/L TDSLudhiana~503 mg/L TDSBangalore~520 mg/L TDSChandigarh~541 mg/L TDS

See water quality in all 44 cities ›

Patna water — questions

What is the TDS of water in Patna?
Groundwater near Patna has an average TDS of about 500 mg/L, within the BIS acceptable limit of 500 mg/L, based on government monitoring data (CGWB Patna district GW booklet (EC-derived), 2007). Levels range roughly 198 to 1408 mg/L across nearby monitoring points.
Is tap water safe to drink in Patna?
TDS around 500 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 Patna?
Possibly not for TDS alone, but an RO purifier with mineral balance still protects against seasonal spikes and other contaminants in Patna.

Data sources

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.