This MATE4 Countertop Water Filter features a cutting-edge 6-in-1 composite filter that's NSF/ANSI 58 US Standard tested by SGS. It is on a mission to block out the hidden risks of tap water, removing 1000+ contaminants by 99.99%! Farewell to PFOA, PFOS, PFAS, and heavy metals(lead, arsenic, aluminum, etc). Goodbye to chlorine, chlorides, fluorides, nitrates, and nitrites. Time to sip on water that sparkles with purity and vitality!