What is Certification scope?

Certification scope tells you what a certificate actually covers, and whether it tests the filter material, one named contaminant, or the performance of the finished system. The wording decides how much a claim is worth. aigerri's stated scope is NSF/ANSI 58 material standards plus EPA safety testing. Alb Filter says its nano cartridge is certified to a US drinking-water safety standard and permitted in public facilities with acute Legionella contamination, while Alkanatur lists Spanish standard test compliance for its pitchers and filters, analysed by an outside laboratory.