UV vs RO vs UF Purifier – The Honest Answer for Indore
When buying a water purifier in Indore, the most common question is: "Should I get UV or RO?" Many people assume UV is sufficient because it kills bacteria. But Indore's water has a problem UV simply cannot fix — high TDS (Total Dissolved Solids).
This guide explains the core difference between UV, RO, and UF purification technologies, and gives you a clear answer for Indore's specific water conditions — by area.
💡 The Short Answer for Indore
Indore's municipal (Narmada) water TDS is 300–450 mg/L. Borewell areas like Rau, Mhow, and Sanwer Road can reach 500–700 mg/L. UV purifiers cannot reduce TDS at all. For Indore, RO is the correct choice — and a combined RO+UV model gives maximum protection.
How Each Technology Works
| Technology | How It Works | Removes TDS? | Kills Bacteria? |
|---|---|---|---|
| RO (Reverse Osmosis) | Forces water through a 0.0001-micron semi-permeable membrane under pressure | ✅ Yes — 90–95% reduction | ✅ Yes |
| UV (Ultraviolet) | Exposes water to UV-C light (254 nm) which destroys bacterial DNA | ❌ No — TDS unchanged | ✅ Yes (kills/deactivates) |
| UF (Ultrafiltration) | Passes water through hollow fibre membranes (0.01 micron) | ❌ No — TDS unchanged | ✅ Partially (bacteria, not viruses) |
What UV Cannot Remove
UV is excellent at what it does — but what it cannot do is critical for Indore:
- Dissolved salts and minerals — calcium, magnesium, sodium (causes hardness and scale)
- Heavy metals — lead, arsenic, chromium from old pipes and industrial areas
- Fluoride — elevated in many Indore borewell areas, causing dental problems
- Nitrates — from agricultural runoff in outer areas like Rau and Mhow
- Chlorine and chloramines — added by the municipal treatment plant
- Dead bacteria — UV kills bacteria but doesn't remove the corpses (still in your water)
⚠️ UV Purifier with High-TDS Water = Not Safe Enough
If you use a UV purifier on Indore's 300–700 mg/L TDS water, you get bacteria-free water — but the dissolved salts, fluoride, hardness and heavy metals remain. Long-term consumption of high-TDS water causes kidney stones, joint problems, and dental fluorosis. A UV purifier alone is not adequate for Indore's water conditions.
Full Comparison: UV vs RO vs UF
| Feature | RO | UV | UF |
|---|---|---|---|
| TDS reduction | ✅ 90–95% | ❌ None | ❌ None |
| Bacteria removal | ✅ Complete | ✅ Kills (but bodies remain) | ✅ Filters out |
| Virus removal | ✅ Complete | ✅ Deactivates | ⚠️ Partial only |
| Heavy metals | ✅ Removes | ❌ No | ❌ No |
| Fluoride removal | ✅ Yes | ❌ No | ❌ No |
| Electricity needed | Yes (pump) | Yes (UV lamp) | No (gravity) |
| Water wastage | Yes (reject water) | No waste | No waste |
| Price in Indore | ₹6,000–₹11,000 | ₹3,000–₹6,000 | ₹2,500–₹5,000 |
| Best for | High-TDS water (Indore) | Low-TDS municipal water | Low-TDS, no power supply |
RO + UV Combined — The Best Option
Most mid-range and premium RO purifiers (₹8,000–₹11,000) include both RO and UV stages. This combination gives:
- RO membrane removes 90–95% TDS, heavy metals, fluoride, salts
- UV stage after the membrane provides a second-pass kill of any microorganisms
- Post-carbon filter improves taste
- Result: low TDS + bacteria-free + no dead organisms in water
For most Indore households, the RO + UV (8-stage) model at ₹8,500–₹11,000 is the best investment — especially in areas with old pipes or irregular water supply.
Which Purifier for Which Indore Area?
| Area | Water Source | Typical TDS | Recommended |
|---|---|---|---|
| Vijay Nagar, Palasia, AB Road | Narmada municipal | 280–400 mg/L | RO (7-stage) or RO+UV |
| Rajwada, Old Indore, Sarwate | Narmada + old pipes | 320–450 mg/L | RO+UV (essential for pipe safety) |
| Rau, Mhow, Sanwer Road | Borewell / mixed | 480–700 mg/L | RO+UV (mandatory) |
| Nipania, Bhawarkuan | Narmada municipal | 300–380 mg/L | RO (7-stage) sufficient |
| Scheme 54, 78, 94 | Narmada municipal | 290–370 mg/L | RO (7-stage) |
💡 Not Sure What Your TDS Is?
Call Aqua Care RO for a free TDS test at your home in Indore. We'll test your tap water and tell you exactly which purifier technology your area needs — with no obligation to buy. Most Indore homes need RO; the test confirms your specific water quality.