The Kinetico K5 is tested and certified by WQA against NSF/ANSI standards 42, 53, 58, and 372 for the reduction percentages of: Arsenic: 99.2% Copper: 99.1% Fluoride: 87.6% Radium: 99.8% Lead: 99.3% PFAS/PFOA: 99% Nitrate/Ni #drinkingwater #health #kinetico