NSF 53 and 42 CERTIFIED: Tested and Certified by IAPMO to NSF/ANSI 53 for lead reduction, NSF/ANSI 42 for chlorine reduction and NSF/ANSI 372 lead compliance. HIGH EFFICIENCY FILTRATION: Reduces Chlorine Taste & Odor, Rust and Corrosion, Sand Sediment, Silt, and Turbidity for 300 gallons or 6 months, depending on water usage and quality. FILTRATION POWER: Advanced eco-friendly coconut carbon provides contaminant reduction and enhanced taste