NSF 401, 53 & 42 Certified Performance: Tested and certified by NSF International against NSF Standard 401, 53 and 42 to reduce 99. 6% of Lead, 97% of Chlorine, taste and odor, 99. 2% of BPA, 96. 6% of Benzene, 96. 6% of Estrone, 95. 2% of Phenytoin, 94. 4% of Ibuprofen, 96. 2% of Naproxen, 97. 2% of Nonyl phenol Top Quality Material: Our premium water filter uses high-grade natural coconut carbon block for quality filtration. Value for Money: Highly-efficient filtration for cents per gallon. You’ll enjoy 300 gallons or 6 months of crisp tasting water at a fraction of the price