NSF 401 – Living Pick Lab

NSF 42 vs 53 vs 58 vs 401 in 2026: Which Water Filter Certification Do You Need for Lead, PFAS and Chlorine?

October 14, 2026 by Living Pick Lab Editorial Team

Comparison of NSF 42, 53, 58 and 401 water filter certifications for chlorine, lead, PFAS and other contaminants.

NSF 42 vs 53 vs 58 vs 401 explained. Learn which water filter certification to look for when buying a filter for lead, PFAS, chlorine, and emerging contaminants.