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Fact-based guides on water quality, well water, TDS, hardness and choosing the right purifier in Mangaluru and across Karnataka.
All six Puryn models come in the same two configurations, RO+UV+UF and UV+UF, with storage from 9 to 20 litres. Configuration is decided by your TDS; the model is decided by storage, mounting and finish.
RO rejects about 97% of calcium and 96% of magnesium. WHO research puts the optimum at 40 to 80 mg/L calcium and 20 to 30 mg/L magnesium. Whether that matters depends entirely on your starting TDS.
Flow rate (LPH) and capacity are two different numbers, and you need both. How to size a softener against your measured hardness, with the regeneration maths worked through for a Mangaluru household.
Boiling kills the germs in Mangaluru well water, and 85% of tested wells in Ullal taluk carried E. coli. But it removes no dissolved salts, hardness, iron or nitrate, and long boiling concentrates them. Here is the evidence and what to do instead.
CGWB data puts Karnataka in the top three states for nitrate; iron and hardness plague borewells statewide. What the numbers mean and when a softener, iron filter or RO is the right fix.
RO is not always the answer. Using BIS limits, the NGT’s 500 mg/L TDS rule and Mangaluru water data, here is how to match RO, UV, UF, iron filters and softeners to your actual water test.
Published studies found acidic water in 20 of Mangalore’s 60 wards, iron up to 10x the limit, and coliform bacteria in coastal wells. What the data says about well water in Mangaluru — and how to treat it.
