Kinetico K5: 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/Nitrite: 91.2% VOC: 99.3% Trihalomethanes: 95% #reverseosmosis