I continue my search for the best water filter solution for my home in Washington, and what a complex world it is. I’ve been talking to my local water utility, calling regional labs and studying Consumer Reports. I don’t know if I’ve made any progress. Last month I interviewed an expert at NSF, which certifies water filtration products. One of the pitchers it has certified is manufactured by ZeroWater. I’d heard a bit about their filters, being comparable to a reverse osmosis system, and when I started reading, I came across “TDS,” or total dissolved solids, for the first time. According to ZeroWater, removing TDS is the primary reason to filter your water, and if you believe the meter that comes with their pitcher, ZeroWater—with its five-stage ion-exchange filter--can in fact get the TDS down to zero parts per million (average TDS in tap water is 127 parts per million). But what does it all mean? Is this really different from traditional … [Read more...] about Zero contaminants in drinking water?