What is TDS?
TDS (Total Dissolved Solids)
How many dissolved salts and minerals are in your water, in ppm.
Short answer
Get your actual supply tested — a ₹100 (≈$1.20) TDS meter or the society's report is enough.
TDS when buying a water purifier
How many dissolved salts and minerals are in your water, in ppm.
Why it matters: Below ~200 ppm you usually need only UV/UF. Above ~500 ppm you need RO. This single number picks your machine.
Look for: Get your actual supply tested — a ₹100 (≈$1.20) TDS meter or the society's report is enough.
Full Water Purifier buying guide