Pennsylvania Proposes MCLs for PFAS

The Pennsylvania Environmental Quality Board published proposed MCLs for PFOA and PFOS. Public hearings will be held later this month.

The proposed MCLs are:
PFOA – 14 ng/L
PFOS – 18 ng/L

Link to a copy of the Pennsylvania Bulletin ( The proposed PFAS MCLs section begins on page 1245 (the proposal includes an extensive discussion on occurrence data, health effects information, and costs as background to the proposed MCLs).