System Tested and Certified by NSF International against ANSI/NSF Standard No. 53 for the reduction of 2,4-D, 2,4,5-TP (Silvex), Alachlor, Asbestos, Atrazine, Benzene, Carbofuran, Carbon, Tetrachloride, Chlordane, Cysts, Endrin, Ethylbenzene, Heptachlor Epoxide, Lead, Lindane, Mercury, Methoxychlor, Monochlorobenzene, MTBE, o-Dichlorobenzene, Simazine, Styrene, Tetrachloroethene, Toluene, Trichloroethene, Trihalomethanes, Toxaphene, and Turbidity, and Standard 42 for Chlorine, Taste and Odor Reduction, and Nominal Particulate Reduction Class I.