New Delhi, Feb. 23 -- RO is often treated as the gold standard of water purification. If you want "safe" water, you buy RO, end of discussion. That's what I believed too, until I tested the water in my own home. The results made it clear that RO wasn't just unnecessary; it could have been the wrong choice.

The problem is that most purifier decisions start with technology, not water quality. TDS levels, source of supply, and existing treatment are rarely part of the conversation. This guide looks at what happens when you reverse that thinking. Using my own water test as a starting point, I'll explain how RO, UV, and UF differ, what they're designed to fix, and how to choose a purifier that fits your water, not the other way around.

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