The 5-stage water filtration removes 99.6% of all dissolved solids from your tap water - more than any other leading brand. The filter is IAPMO certified to reduce PFOA/PFOS, lead, chromium and mercury. Every water pitcher comes with a free TDS Meter to check the levels of dissolved solids before and after filtering your tap water - to show there is nothing left behind but the purest tasting water.?