Do you need a water purifier in India?
It depends on where your water comes from and what is in it. Check that first, then compare what each option costs per year. Sometimes RO is the right choice; sometimes a simpler option does the same job.
How India's drinking water compares (WHO/UNICEF)
76.4% · #79 / 148
Official WHO/UNICEF data: 76.4% of people in India use safely managed drinking water services (2024). That puts India at rank 79 of 148 countries with an estimate.
This is a national figure, not a statement about your tap. This figure looks at access, availability and contamination at the source. It does not tell you what is in your own tap, storage tank or borewell. For that, you need a test.
Source: WHO/UNICEF Joint Monitoring Programme, 2025 update (reference year 2024), via World Bank indicator SH.H2O.SMDW.ZS. Rank: our calculation among the 148 countries with an estimate; countries with the same value share a rank.WHO health guideline values for drinking water
Mae Why should we care about any of this?
These are World Health Organization guideline values, intended to protect public health over a lifetime of drinking the water. National limits are based on them and are sometimes stricter.
👥 Everyone
A sign of contamination from faeces, which WHO links to diarrhoeal diseases such as cholera and typhoid. If your water supplier issues a boil-water notice, follow it.
📍 The main risk where water is stored or supply is intermittent.
What can it do?
According to WHO, germs from faeces can cause diarrhoea, vomiting and fever. WHO estimates about 505,000 deaths a year worldwide from diarrhoea linked to contaminated drinking water, almost all where water is not treated. Where tap water is treated and monitored, such outbreaks are rare; WHO and health authorities point to water stored in open containers, breaks in supply and private wells as higher-risk situations. WHO, 2023
🧒 Young children 🤰 Pregnancy
WHO: no level of lead exposure is known to be without harmful effects; young children and pregnancy are the most sensitive. Boiling does not remove lead.
What can it do?
According to WHO, lead acts slowly and usually without symptoms. In children it is associated with lower IQ and with effects on attention and learning; WHO says blood levels as low as 3.5 µg/dl may be linked to this. In adults it is associated with a higher risk of high blood pressure and heart and kidney problems. WHO attributes more than 3.5 million deaths worldwide in 2023 to lead from all sources, mostly paint, dust and industry rather than drinking water; old lead pipes are one possible source. A test is the only way to know your own situation. WHO, 2026
👥 Everyone
WHO links long-term exposure to arsenic in drinking water with skin changes and increased risks of certain cancers, after years of exposure. Boiling does not remove arsenic.
📍 Found in groundwater in parts of the Ganga and Brahmaputra plains.
What can it do?
According to WHO, sudden poisoning needs very high levels and is rare. The usual concern is drinking water above the guideline for years: WHO describes skin changes, such as spots and hard patches on the palms and soles, after about 5 years, and increased risks of skin, bladder and lung cancer. WHO estimates about 140 million people in at least 70 countries drink water above 10 µg/l. Arsenic has no taste or smell: a test is the only way to know. WHO, 2022
🧒 Young children
WHO discusses fluoride in relation to dental health and, at higher levels over many years, to effects on teeth and bones.
📍 Found in groundwater in parts of Rajasthan, Haryana, Karnataka, Andhra Pradesh and Telangana. The Indian standard's acceptable limit is 1.0 mg/l.
What can it do?
According to WHO, fluoride around 1 mg/l is associated with protection against tooth decay. Above 1.5 mg/l for years during childhood, teeth can get white or brown spots (dental fluorosis), which WHO describes as mainly cosmetic in mild forms. WHO associates 3–6 mg/l with high water intake with effects on bones (skeletal fluorosis); severe forms usually only above 10 mg/l. WHO
🍼 Bottle-fed babies
The WHO value is set to protect bottle-fed babies, the most sensitive group. Boiling does not remove nitrate.
📍 The Indian standard uses 45 mg/l.
What can it do?
According to WHO, in babies under about 6 months fed formula made with high-nitrate water, nitrate can reduce how much oxygen the blood carries ("blue baby syndrome"), seen as a bluish colour, especially around the lips. WHO notes it is rare where public water is treated and mostly linked to private wells near farmland, that breastfeeding protects babies, and that boiling does not remove nitrate. WHO
WHO sets no health-based value. WHO notes that water above about 600 mg/l TDS tends to taste worse; hard water leaves limescale.
📍 The Indian standard lists 500 mg/l TDS as acceptable, mainly for taste.
What can it do?
WHO links no disease to hard water or to high total dissolved solids. They affect taste, soap and limescale in kettles and pipes.
General information, not medical advice and not an assessment of your own water. For contamination or boil-water notices, follow your water supplier or health authority. If you or your child have symptoms, see a doctor.
Sources: WHO Guidelines for drinking-water quality, 4th edition incorporating the 1st and 2nd addenda (2022); WHO fact sheets on lead, arsenic, drinking-water; WHO chemical fact sheets on nitrate and fluoride. Arsenic is a provisional value. This is general information, not medical advice.
What actually matters in India
Nitrate in groundwater
In the Central Ground Water Board's 2024 report, about 20% of groundwater samples were above the 45 mg/l limit, across 440 districts. The share was above 40% in Rajasthan, Karnataka and Tamil Nadu.
CGWB Annual Ground Water Quality Report 2024, as reported by PTI (2 Jan 2025)
Fluoride and arsenic in some regions
In the same report, 9.04% of samples were above the fluoride limit (mainly Rajasthan, Haryana, Karnataka, Andhra Pradesh, Telangana) and 3.55% above 10 ppb arsenic (mainly the Ganga and Brahmaputra plains). Government data show the number of affected rural habitations has fallen sharply since 2019.
Germs from storage and intermittent supply
A tap connection does not guarantee safe water at the glass: when supply is intermittent and water is stored in tanks or containers, germs are the main risk. Boiling, UV and chlorination are common methods to reduce germs.
TDS is not a safety score
The Indian standard IS 10500:2012 lists 500 mg/l TDS as acceptable and 2,000 mg/l as permissible where no alternative source exists. A low TDS reading does not mean water is free of germs, and a high one does not by itself mean it is unsafe.
How to check your own water
A home TDS meter shows one thing: dissolved salts. It does not show germs, arsenic, fluoride or nitrate. A laboratory test does. Many states let the public test a sample at a government lab for a small fee.
- Jal Jeevan Mission water quality (WQMIS) — official test results reported by state labs and field kits, mainly for rural supply.
- Government water testing labs — India has 2,163 water testing labs (Aug 2024); many states let the public test a sample for a nominal fee.
- Your municipal water utility — for city supply, ask your utility for its latest results against IS 10500 (the limits are listed here).
What fits your budget
Not sure what is in your water? Test it first: a test usually costs less than the wrong purchase. See "How to check your own water" above.
For arsenic or fluoride, have the water tested first: these do not change taste or colour, and boiling does not remove them, and many ordinary carbon filters are not designed for them.
| Option | First year | Each year after |
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This is a calculation, not advice. Drinking water only: 2 litres per person per day, the amount WHO assumes for an adult. Purifier rows include the listed purchase price and the lowest service cost we found; actual service plans, filter changes and electricity vary by brand, city and water. Prices are list prices read on 3 November 2026 and change often. Whether a product helps depends on what it is tested for: check the pack.
The honest answer
When you may not need more
- Your supply is municipal, your utility's results or a lab test meet IS 10500, and your storage is clean: boiling, or nothing more, may be enough.
- A test shows TDS within 500 mg/l and no germ, arsenic, fluoride or nitrate problem: the standard does not call for RO. If germs are the only concern, UV or boiling are common methods to reduce them.
When testing or a purifier is worth it
- You drink borewell or handpump water in a district known for fluoride, arsenic, nitrate or uranium: test first at a government lab, then choose. RO is one of the methods that reduces these.
- Your TDS is well above 500 mg/l (often tanker or borewell water): RO is commonly used for high-TDS water; check whether your TDS calls for it.
- Water arrives intermittently or is stored in tanks: germs are the main risk, and UV, boiling and chlorination are common methods to reduce them.
We don't sell purifiers and earn nothing from any link on this site. We name products only to show real prices.
Sources
- WHO/UNICEF JMP 2025 update via World Bank, SH.H2O.SMDW.ZS (read 3 Nov 2026)
- CGWB Annual Ground Water Quality Report 2024, reported by PTI (read 3 Nov 2026)
- PIB: Jal Jeevan Mission water quality testing, Aug 2024 (read 3 Nov 2026)
- IS 10500:2012 drinking water limits (IIT Kanpur) (read 3 Nov 2026)
- India Water Portal: piped, not protected (read 3 Nov 2026)
- Purifier list prices (Aquaguard Glory RO+UV+UF ₹9,999; Crown UV ₹5,129), Smartprix (read 3 Nov 2026)
- Service and part costs (AMC ₹2,000–4,500 a year; UV lamp ₹800–1,500), Mannubhai, 25 May 2026 (read 3 Nov 2026)
- Bisleri 20-litre jar, ₹150 (read 3 Nov 2026)
- Packaged water 1 litre, ₹18 (BigBasket) (read 3 Nov 2026)
- WHO Guidelines for drinking-water quality: 2 litres per adult per day (read 3 Nov 2026)