By water problem
A reading above 1,000 ppm puts your supply at twice the BIS acceptable limit of 500 ppm and firmly into borewell territory. It is drinkable in the sense that it will not make you ill this week, but it tastes brackish, it scales everything it touches, and it is a genuinely demanding brief for a domestic purifier. This page is about specifying for it correctly rather than optimistically.
Start with the number you should actually design around, which is not the one you measured. Borewell and tanker TDS climbs through summer as the water table drops, routinely by 30-40%. If your meter reads 1,100 ppm in August, design for 1,500. That single adjustment is the difference between a membrane that lasts a year and one that fouls in five months.
Between 1,000 and 1,500 ppm, a standard 2,000 ppm-rated RO is the correct and economical answer — the KENT Grand Plus, Aquaguard Delight NXT and Pureit Copper+ all qualify, and all include the TDS controller you need. Above 1,500 ppm sustained, move to a 3,000 ppm membrane (the AO Smith Z9 is the main domestic option) or add antiscalant dosing ahead of a standard one. Do not try to save money by running a 2,000 ppm unit on 2,200 ppm water; you will simply buy membranes instead.
Two expectations worth setting now. Output will be around 80-130 ppm with the TDS controller set mid-range, which is exactly where you want it — chasing near-zero output on this input wastes far more water and tastes worse. And membrane life will be 10-12 months, not the 18-24 on the box. Budget for it rather than being surprised by it.
Hot water on tap, and the best water recovery in the category
The default recommendation for Indian borewell water
Stainless-steel tank and self-sterilising UV care
Aquaguard's best-selling all-rounder, now with active copper
AO Smith engineering without the hot-water premium
Copper plus alkaline in Aquaguard's premium domestic unit
Hot and ambient dispensing at a sane price
Counter-top KENT with a UV-sterilised tank
HUL's copper RO with an enforced filter-life cut-off
High-throughput KENT for large families and small offices
Your membrane rating must exceed your worst summer reading, not your current one. 1,000-1,500 ppm measured → buy 2,000 ppm rated. Above 1,500 ppm measured → buy 3,000 ppm rated, or add antiscalant dosing.
Mandatory at this level. High input needs a deliberate blend so output lands at a palatable 80-130 ppm, and it lets you re-tune between the monsoon and the summer, when your supply is effectively two different waters.
Above 1,000 ppm the sediment and carbon stages are structural, not cosmetic — they are what stops the membrane fouling. Change them every six months without exception. This is the cheapest maintenance you will ever do and it protects the expensive part.
High TDS is usually accompanied by high calcium and magnesium, which is what scales membranes. If you also see white crust on taps and geyser elements failing early, cost out a point-of-entry softener separately — the drinking-water RO will not fix scale elsewhere in the house.
At this TDS you will see a technician annually at minimum. Buy from a brand that reaches your pin code in 48 hours, and get the AMC quoted in writing before you order, not after the first failure.
| # | Product | Price | Score | Max input TDS | Best for |
|---|---|---|---|---|---|
| 1 | AO Smith Z9 Green RO | ₹33,990 | 9/10 | 3000 ppm | Premium kitchens, high-TDS or brackish supply, and households that drink a lot of tea and coffee. |
| 2 | KENT Grand Plus | ₹16,499 | 8.9/10 | 2000 ppm | Families on borewell, tanker or high-TDS municipal supply who want the safest all-round choice. |
| 3 | LG PuriCare WW182EP | ₹31,990 | 8.8/10 | 2000 ppm | Hygiene-focused buyers, humid coastal cities, and anyone who has ever opened a purifier tank and been unpleasantly surprised. |
| 4 | Aquaguard Delight NXT | ₹17,990 | 8.7/10 | 2000 ppm | Buyers who value service reliability and compact design over maximum tank capacity. |
| 5 | AO Smith X7 | ₹23,490 | 8.6/10 | 2000 ppm | Buyers who want AO Smith's engineering and water efficiency but do not need hot water. |
| 6 | Aquaguard Aura | ₹25,490 | 8.5/10 | 2000 ppm | Premium buyers who want copper and alkaline options in one well-built unit. |
| 7 | Havells Aqua S | ₹21,490 | 8.5/10 | 2000 ppm | Buyers who want hot water on tap without paying premium-brand prices. |
| 8 | KENT Pearl RO | ₹17,990 | 8.4/10 | 2000 ppm | Renters and anyone who cannot drill walls, but still needs full high-TDS RO purification. |
| 9 | Pureit Copper+ RO | ₹15,999 | 8.4/10 | 2000 ppm | Safety-first households, and anyone who has previously forgotten filter changes. |
| 10 | KENT Prime TC | ₹15,490 | 8.3/10 | 2000 ppm | Large households and small office pantries that need volume more than features. |
Prices are indicative street prices, last verified 2026-08-01. Always confirm the current price on the marketplace before purchasing.
Free consultation · Pan-India
Tell us your city, your water source and your budget. For homes we will recommend the right technology — including telling you when a ₹3,000 purifier is genuinely enough. For offices, societies and factories, our team will size a system against your water report and send a specification-backed quotation.
Or email betterworkindia@gmail.com — attach a water analysis report and we can quote faster.
Homes
Right-sized recommendation for your TDS, not the most expensive unit
Offices & societies
25 LPH to 2,000+ LPH, sized on headcount and feed water
Industry
Pharma, food, textile, boiler feed — engineered to your specification
Service & AMC
Installation, repair and AMC with written response times