AWWA Articles

Preliminary regulatory determinations for PFOS, PFOA

This afternoon, the U.S. Environmental Protection Agency (EPA) proposed regulatory determinations for perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) in drinking water.

In a public announcement of the decision, EPA reported:

Through today’s action, EPA is seeking public comment on its proposed regulatory determinations for eight contaminants listed on the fourth Contaminant Candidate List. The Agency is proposing to regulate two contaminants, PFOS and PFOA. EPA is also asking for information and data on other PFAS substances, as well as seeking comment on potential monitoring requirements and regulatory approaches EPA is considering for PFAS chemicals. The Agency is proposing to not regulate six contaminants: 1,1-dichloroethane, acetochlor, methyl bromide,metolachlor, nitrobenzene, and RDX.

EPA will seek comment on the preliminary determinations for 60 days after the notice is published in the Federal Register. Additional information on EPA’s efforts to address PFAS can be found in the PFAS Action Plan.

Water utilities with questions can take advantage of the AWWA Briefing on PFAS and other materials available at

For more information, contact Steve Via, AWWA director of federal relations.