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