Best Water Purifiers in India 2026

Check your water’s TDS before you buy: if it is above about 500 ppm, as most borewell and tanker supplies are, you need an RO purifier, and if it is a low-TDS municipal supply, a UV or UF purifier is enough and wastes no water. Among RO models, look for a rated input limit above your highest reading, the lowest reject water you can find and a service network that reaches your pincode. Buy a hot water purifier only if your family makes tea, formula or instant meals from hot water every day.

RO, UV or UF: which purifier does your water need?

The three technologies do different jobs. RO (reverse osmosis) pushes water through a fine membrane that removes dissolved salts, hardness and many chemicals, so it is the only one that lowers TDS. UV kills bacteria and viruses with ultraviolet light. UF (ultrafiltration) strains out particles, cysts and most bacteria, and works without electricity.

Most purifiers sold in India combine them: RO plus UV is the common pairing for borewell water, and some add UF or a mineral stage after the RO. A UV or UF purifier without RO is a good choice for municipal supply that is already low in salts, because it removes germs without draining any water. It is the wrong choice for hard water, because the salts pass straight through.

What TDS level needs an RO?

TDS (total dissolved solids) is the amount of salts and minerals dissolved in water, measured in ppm or mg/L. The Bureau of Indian Standards drinking water standard treats 500 mg/L as the acceptable limit. As a working rule:

• Below about 300 ppm: usually municipal water. UV or UF is enough; RO only makes the water flatter.
• 300 to 500 ppm: RO is optional. Choose one with a mineral or taste adjuster so the water does not taste flat.
• Above 500 ppm: typical of borewells and tankers. Buy an RO purifier, and check that its rated input limit is well above your highest reading, since borewell TDS climbs in summer.

A handheld TDS meter costs little and settles the question in a minute. Test the tap at different times of year if you switch between municipal and tanker water.

How much water does an RO waste?

Every RO purifier sends part of the water it takes in down the drain, carrying the salts it removed. In our tests most RO units drained 2 to 3 litres for each litre of purified water at 450 ppm input, and the ratio got worse as input TDS rose. Brand recovery claims vary and are not always consistent, so treat them as best-case figures and check the drain on your own water.

You cannot avoid reject water, but you can use it. Run the drain line into a bucket and use the water for mopping, flushing, washing vehicles or watering hardy plants. Do not drink it or use it for cooking.

Under-sink or wall-mounted: which suits your kitchen?

An under-sink (under-the-counter) purifier hides the filters, pump and tank in the cabinet and shows only a tap on the counter. It suits modular kitchens, usually has a larger tank, and needs a hole in the counter for the tap, a power point in the cabinet and enough depth for the unit. Measure the cabinet and check how much clearance the tap gives under the spout before ordering, since short taps will not take a tall pot or bottle.

A wall-mounted purifier is easier to install and service, needs no cabinet space and is the usual form for hot water purifiers. It takes up wall space near the sink and the power point.

Is a hot water purifier worth it?

A hot water purifier dispenses purified water at near-tea temperature as well as at room temperature. It is worth it for families who make chai, coffee, green tea, oats or baby formula several times a day, and for elderly parents who prefer a warm glass. It adds a heater and so draws more power, and hot water stops in a long power cut.

Look for a stainless-steel tank and nozzle so hot water does not sit in plastic, a child lock on the hot tap, and more than one temperature setting if you make green tea or formula, which need water cooler than full heat. No purifier tap is safe for pouring straight into a baby’s bottle: always cool the water and test it on your wrist.

What should you check about filters, warranty and service?

The purchase price is only part of the cost. Ask for the price of a full genuine filter set and how long it lasts; many brands do not publish it. Compare the warranty in writing, since most purifiers carry one year and a few carry two, and check whether the membrane is covered only below a stated input TDS or hardness. An AMC (annual maintenance contract) can help after the warranty ends, but read what it excludes.

Service reach matters more than the warranty length if you live outside a metro. Eureka Forbes, Kent and AO Smith have technicians in many smaller towns; newer brands are still building their networks. Ask the seller who will install and service the purifier at your pincode, and keep the invoice and the service request numbers.