In my building, a former iron mine used as a kiln was replaced with a water tank. The old 5 micron carbon filter did not improve the water quality, nor did the new Brita Longlife. However, those incredible filters made it an A+. Looking for a way to get drinking water we also went to Zerowater so we have a dissolved solids meter. To answer other reviews, yes, our TDS goes from 54 PPM on unfiltered faucets to 61 PPM on filtered faucets. But obviously the filter is doing something because water doesn't taste like robot puke, so stop measuring everything in your life. If I buy a filter to remove known contaminants, I'll likely buy a known brand that's certified for those contaminants.)
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