Is an RO Water Purifier Worth It in India? Do I Need RO?
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Is an RO Water Purifier Worth It in India?
Is an RO water purifier worth it? In India, the honest answer is: only when your tap water has a high TDS level, above about 500 mg per litre. Many homes get treated city water with low TDS. For them, RO wastes water and strips out minerals. It also costs more than a simple UV or UF purifier that does the same job.
Here is the honest truth that most "RO worth it" articles skip. The answer depends on one number you can measure in a few seconds. That number is your water's TDS, or total dissolved solids. An RO unit costs Rs 10,000 or more. So first check if your water is salty enough to need it.
I have lived in homes on borewell water in Tirupati where RO was a genuine relief, and in flats on clean Cauvery supply where the RO was pointless overkill. So this guide answers is an RO water purifier worth it the way I would tell a friend. Test first, then decide. We don't sell RO purifiers, so there is no sales pitch here.
Are water purifiers worth it at all? Yes, when your water has a real problem. That problem can be germs, mud or high TDS. The trick is to match the purifier type to the problem. RO fixes high TDS. UV and UF fix germs and mud.
Q: What is RO?
Reverse osmosis pushes water through a fine membrane. The membrane removes dissolved salts, metals and most minerals. It is the strongest home method, but it also removes good minerals.
Q: How do I know if I need it?
Buy a low-cost, pen-style TDS meter and test your tap water. The reading decides everything.
Q: Is RO banned in India?
No national ban is in force. A green tribunal ordered a ban on RO for water below 500 TDS. In March 2022 the Supreme Court put that order on hold until further orders.
Do I Need an RO Water Purifier? When RO Is Needed
Do you need an RO water purifier? You need one when your tap water TDS is above 500 mg per litre. That is the acceptable limit in India's drinking water standard, IS 10500. You may also need RO if the water tastes salty or leaves white scale on vessels. Below 500 TDS, you usually do not need RO.
The Bureau of Indian Standards sets a clear bar for drinking water. If your water is above the acceptable limit, it needs real treatment, not just filtering.
BIS standard (IS 10500:2012): The acceptable TDS limit for drinking water is 500 mg per litre, and the permissible limit — allowed only when no better source exists — is 2000 mg per litre — Bureau of Indian Standards, 2012.
So the rule is simple. If your tap water reads above 500 mg per litre on a TDS meter, RO earns its place. Salty water tastes off and leaves white scale in your kettle. (Here is how to remove that kettle scale.) RO fixes the salt problem.
Where Is RO Needed in India?
RO is most needed where the groundwater is salty. The Central Ground Water Board checks well water across India every year. Its 2024 groundwater quality report found that Haryana and Punjab had the most districts with salty groundwater above the safe limit.
CGWB 2024 report: The worst districts in Haryana include Sirsa, Hisar, Bhiwani, Sonipat, Jind and Gurugram. In Punjab, Fazilka, Bathinda and Muktsar are badly hit — ThePrint, February 2025.
Salty groundwater turns up in other states too, so your own reading matters more than your city name. When should you use an RO water purifier? Use it when your own tap reads above 500. Do not use it just because your neighbour has one.
Taste backs up the number too. The World Health Organization has rated how water tastes at different TDS levels, and it lines up well with the BIS cut-off.
WHO taste ratings: Drinking water is rated excellent below 300 mg per litre, good from 300 to 600, fair from 600 to 900, poor from 900 to 1200, and unacceptable above 1200 mg per litre — World Health Organization TDS guidance.
If your water sits in the "poor" or "unacceptable" band, an RO water purifier is worth it. You can compare current models here — RO water purifiers on Amazon — but check your TDS reading first so you buy the right kind.
When RO Is a Waste of Money
An RO water purifier is a waste of money when your tap water TDS is already below about 300 mg per litre. At that level the water tastes good and meets the BIS limit. RO would only strip out minerals like calcium and magnesium. It also sends water down the drain and costs more than a basic UV purifier.
Treated piped water in many Indian cities comes from rivers and lakes, and it often reads low on TDS. In Delhi, the man who brought the RO case to the tribunal told Down To Earth that Delhi Jal Board supply does not go above 200 mg per litre. Your own tap is the only reading that counts, so test it. Running low-TDS water through RO is like using a fire hose to water a plant.
This is why a green court stepped in. The waste and the mineral loss became a public concern.
Water wastage: The National Green Tribunal directed the government to ban RO purifiers where TDS is below 500 mg per litre and to make RO units recover more than 60 percent of water (up to 75 percent), with the reject water reused for cleaning, flushing, and gardening — National Green Tribunal, May 2019.
The tribunal also asked the Environment Ministry to warn people about demineralised water. That is water with nearly all its minerals removed. In December 2021 the tribunal told the pollution board to ban RO where TDS is below 500. In March 2022 the Supreme Court stayed that order until further orders, so no national ban is in force.
Expert report (NEERI, CPCB and IIT Delhi): "It will be pragmatic to not allow the use of low TDS water treated through RO (which leads to loss of precious minerals like Calcium and Magnesium)" — joint report to the tribunal, quoted by Down To Earth, May 2019.
The same report said RO makers should make sure the cleaned water has 150 mg per litre of TDS. The WHO adds a taste point: water with very low TDS can taste flat.
Honest health note: This is general information, not medical advice. RO water is safe to drink. The mineral concern matters most if your diet is already low in calcium and magnesium. If you have a specific health condition, talk to your doctor about your water.
RO vs UV vs UF vs Boiling: Which Is Right?
RO suits high-TDS or hard water. UV (ultraviolet) suits low-TDS municipal water that may carry germs. UF (ultrafiltration) suits areas with muddy water but low TDS and works without electricity. Boiling kills germs but does nothing for dissolved salts or TDS. Match the method to your actual water problem, not to marketing.
The biggest mistake is buying RO when your problem is germs, not salts. Here is how the four common methods compare for an Indian home. For a deeper look, read our RO vs UV vs UF guide.
| Method | Best For | Removes | Misses | Needs Power? |
|---|---|---|---|---|
| RO (Reverse Osmosis) | High TDS / hard / borewell water (above 500) | Dissolved salts, heavy metals, most minerals | Nothing major — but also strips good minerals | Yes |
| UV | Low-TDS municipal water with germ risk | Bacteria and viruses | Dissolved salts, TDS, hardness | Yes |
| UF (Ultrafiltration) | Muddy / turbid but low-TDS water | Mud, cysts, bacteria | Dissolved salts, viruses | No |
| Boiling | Emergency / monsoon germ safety | Bacteria and viruses | TDS, salts, metals, chemicals | No (gas/electric) |
For most city homes on clean supply, a UV purifier or a UV+UF combo is the smarter buy. It kills germs without wasting water or stripping minerals. No power at home for long hours? A gravity water filter needs no electricity. Save RO for truly salty water. If you want to see options side by side, here are UV water purifiers on Amazon and RO+UV+UF combo purifiers on Amazon.
The Real Cost of Owning an RO
The real cost of an RO water purifier in India is more than the sticker price. On Aquaguard's own website, RO models run from about Rs 10,000 to Rs 24,000, while its UV+UF model costs about Rs 7,500. On top of that you pay for filters and service, and RO sends some water down the drain.
When people ask if an RO water purifier is worth it, they usually only picture the purchase price. But other costs add up over the years:
- Check the upfront price — Aquaguard RO models cost about Rs 10,000 to Rs 24,000 on the brand's site. Sale prices change often.
- Budget for filters — filters and the RO membrane need changing from time to time. Aquaguard sells "2 Year Filter Life" models, and its yearly service plan starts from Rs 599.
- Count the wasted water — in 2019, RO makers told the tribunal their units kept no more than 20 percent of the water. That is about 4 litres to the drain for every 1 litre you drink. The tribunal asked for at least 60 percent. Check the recovery figure on any model you buy.
- Add the electricity — the booster pump runs on power, a small but real monthly cost.
- Reuse the reject water — catch it in a bucket for mopping, flushing, and plants, exactly as the green tribunal advised.
If your water does not need RO, all of this is money and water spent for no health gain. That is the core of the worth-it question.
If you do need RO, pick one that adds minerals back
What to Buy Instead (Or Alongside)
If your home runs on 20-litre branded water cans, you may not need an RO purifier at all. A good automatic water dispenser gives you that water on tap without wasting any. Many Indian families pair can water with a simple dispenser and skip the RO upkeep.
Here is the option most RO articles never mention. A huge number of Indian homes already buy sealed 20-litre water cans from trusted suppliers. That water is already treated. Putting it through an RO would be pointless. These homes need an easy way to pour it, without lifting a 20-kilo can. Not sure which one you need? Read water can dispenser vs water purifier.
That is exactly what the InstaCuppa Automatic Water Dispenser does. It sits on a 20-litre can and pours water at the touch of a button. It has a child lock. It charges over USB, so it keeps working in a power cut. No filters to change, no water wasted, no membrane to replace.
InstaCuppa Automatic Water Dispenser
For 20L cans — USB rechargeable, child lock, steel outlet
Shop NowSo the smart plan for many families is this. Test your TDS. If it is high, buy an RO. If it is low and you use cans, a dispenser is cheaper, greener and far less hassle.
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Frequently Asked Questions
Is an RO water purifier worth it for municipal tap water?
Usually not. Treated city supply often reads low on TDS. A UV purifier handles any germ risk without wasting water or stripping minerals. Test your TDS first. If it is below 300, RO is overkill.
What TDS level is safe to drink without RO?
By the BIS standard IS 10500, water up to 500 mg per litre TDS is within the acceptable limit for drinking. The WHO rates water below 300 as excellent and 300 to 600 as good for taste. Below 500, you usually do not need RO.
Is RO water bad for health because it removes minerals?
RO water is safe to drink. It does remove most minerals, including calcium and magnesium. This matters most if your diet is already low in those minerals. If you use RO on low-TDS water, choose a model that adds minerals back, or simply use UV instead.
How much water does an RO purifier waste?
It depends on the model. In 2019, RO makers told the National Green Tribunal their units kept no more than 20 percent of the water, so about 4 litres went to the drain for every 1 litre kept. The tribunal asked for at least 60 percent. Catch the reject water in a bucket and reuse it for mopping, flushing and plants.
Is RO water banned in India?
No national ban is in force. The National Green Tribunal ordered a ban on RO where TDS is below 500 mg per litre. In March 2022 the Supreme Court stayed that order until further orders. RO purifiers are still sold across India. The low-TDS caution still makes sense, though.
RO vs UV: which should I buy?
Buy RO if your water is hard or high in TDS (above 500). Buy UV if your water is low in TDS but may carry germs, which is the case for most city supply. If you face both problems, an RO+UV combo covers everything.
Do I need an RO water purifier?
Only if your tap water TDS is above 500 mg per litre, the acceptable limit in IS 10500. Test your water with a TDS meter first. If it reads below 500 and your only worry is germs, a UV or UF purifier is enough.
Are water purifiers worth it?
Yes, when your water has a real problem such as germs, mud or high TDS. Pick the type that fixes your problem. RO is for high TDS, UV is for germs, and UF is for mud and cloudy water.
RO ki kimat kya hai? (आरो कितने में लगता है?)
RO ki kimat means the price of an RO purifier. On Aquaguard's own website, RO models cost about Rs 10,000 to Rs 24,000, and a UV+UF model costs about Rs 7,500. Add filter and service costs each year.
Sources & References
- IS 10500:2012 Drinking Water Specification (TDS acceptable 500, permissible 2000 mg/l) — Bureau of Indian Standards, 2012
- Total Dissolved Solids in Drinking-water — palatability ratings and flat taste at very low TDS — World Health Organization
- Ban RO systems if dissolved solids are less than 500 mg/l: NGT (60% recovery norm, 20% recovery admitted, NEERI-CPCB-IIT Delhi report) — Down To Earth, May 2019
- SC stays NGT ban on water purifiers where TDS below 500 mg/l (until further orders) — Business Standard, March 2022
- NGT pushes to ban RO purifiers for water with TDS below 500 mg/l — India Water Portal
- CGWB Annual Ground Water Quality Report-2024: salinity districts in Haryana and Punjab — ThePrint, February 2025
- Aquaguard water purifier range and prices (RO, UV+UF, service plan) — Eureka Forbes
Founder, InstaCuppa | Building kitchen tools that take the work out of busy Indian mornings.
InstaCuppa makes everyday kitchen tools — bottles, blenders, frothers, and kettles — designed for Indian homes. The goal is simple: take the work out of your mornings so a cold glass of water or a hot cup is never a chore.
Some links are affiliate links — if you buy through them we may earn a small commission at no extra cost to you. We only recommend products we'd use ourselves.
