What is PFAS and lead reduction?

PFAS and lead reduction is a yes or no question: does the brand state that its filter reduces PFAS and lead? It is a claim made on the brand's own site, not a measured result, so the certification behind it decides how far you can take it. Acala, aigerri, Airthereal and Alb Filter each say yes. Alkanatur says no for its Drops filter. A yes says nothing about how much is removed, so check the named substances in the certification scope next.