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> Activated carbon filtering removes up to about 75% of PFAS

Common inexpensive non-RO filter systems come with independent test results showing 99% removal of PFOA/PFOS (see e.g https://www.brondell.com/content/UC300_Coral_PDS.pdf). Do we have reason to believe that other PFAS don't filter as easily?

AIHI the shorter PFAS molecules are not captured as effectively by activated carbon.

> Activated carbon filtering removes up to about 75%

Seems like the limitation must be more than reducing concentrations in fluid? Otherwise you'd just do multiple passes?

Yes, the key here is the degradation of the forever chemical, not the removal. Removal itself doesn't really change the environmental scale of it