EPA finalizes regulatory determinations (CCL4) PFOS and PFOA

EPA finalizes regulatory determinations (CCL4) PFOS and PFOA

The March 3, 2021  Federal Register Notice is here:  https://www.federalregister.gov/documents/2021/03/03/2021-04184/announcement-of-final-regulatory-determinations-for-contaminants-on-the-fourth-drinking-water  [use the PDF button on the right hand side for the best version]

On February, 22, 2021, EPA reissued final regulatory determinations for contaminants on the fourth Contaminant Candidate List (CCL 4). EPA is making final determinations to regulate two contaminants, perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA), in drinking water and to not regulate six contaminants (i.e., 1,1-dichloroethane, acetochlor, methyl bromide (bromomethane), metolachlor, nitrobenzene, and RDX). With the final Regulatory Determinations for PFOA and PFOS, EPA will move forward to implement the national primary drinking water regulation development process for these two PFAS. The Regulatory Determinations also outline avenues that the agency is considering to further evaluate additional PFAS chemicals and provide flexibility for the agency to consider groups of PFAS as supported by the best available science.

EPA’s webpage also has more info: https://www.epa.gov/ccl/regulatory-determination-4

Patti Kay Wisniewski

Drinking Water Preparedness and Resiliency Coordinator

US EPA Region 3

Drinking Water Section (3WD21)

1650 Arch Street

Phila, PA  19103


Cell: 215-514-7893

Email: [email protected]

(note the hyphen appears in email only)