NSF 401 certified to reduce BPA by 99.2%, Estrone by 96.6%, Phenytoin by 95.2%, Ibuprofen by 94.4%, Naproxen by 96.2%, Nonyl phenol by 97.2% NSF 53 certified to reduce Lead by 99.6%, Cyst by 99.99%, Benzene by 96.6%, Carbofuran by 98.4%, Endrin by 96.6% NSF 42 certified to deliver better tasting water by reducing Chlorine, taste and odor