EPA to Regulate PFOA and PFOS Under SDWA

EPA to Proceed with Developing Regulations for PFOA and PFOS

Earlier today (February 20, 2020), the Environmental Protection Agency (EPA) posted its preliminary regulatory determination for eight unregulated contaminants on the Candidate Contaminant List 4 (CCL4).  A copy of the pre-publication Federal Register notice is enclosed.          (ccl_reg_det_4_preliminary_)Once the enclosed document is published in the Federal Register, there will be a 60-day public comment period.

According to the enclosed document:

  1. EPA will proceed to develop regulations for: PFOS and PFOA.
  2. EPA will not regulate the following: 1,1- dichloroethane, acetochlor, methyl bromide (bromomethane), metolachlor, nitrobenzene, and RDX.

In the enclosed document, EPA also presents updated information on three other CCL4 contaminants: strontium, 1,4-dioxane, and 1,2,3-trichloropropane.


Under the Safe Drinking Water Act (SDWA) Amendments of 1996, every five years EPA is to make a Regulatory Determination (a decision whether or not to proceed with developing a drinking water regulation) for at least five constituents from Candidate Contaminant Lists (CCL). In December 2019 EPA submitted the enclosed Regulatory Determination for constituents on the CCL4 to the Office of Management and Budget.

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About Dan Askenaizer

Dr. Askenaizer leads WQTS’ work on regulatory compliance support for many of our water agencies clients. Dr. Askenaizer tracks water quality and treatment regulations at the Federal and State levels and provides regulatory updates to our clients. Dr. Askenaizer has strong expertise in the development of Regulatory Monitoring and Compliance Plans (RMCPs), which he has completed for a number of water agencies. He has also been working on a number of projects dealing with the development of distribution system monitoring plans and review of nitrification control strategies. Prior to joining WQTS, Dr. Askenaizer was the Water Quality Manager for the Glendale Water and Power. Under his leadership, the Water Quality Group conducted a demonstration-scale study of chlorite for nitrification control and a pilot-scale study of biological treatment for removal of nitrate. Dan has 30 years of experience working on projects dealing with regulatory, water quality and public health issues. Dan has given numerous presentations at workshops and round-tables across the country for water utilities. Dan was instrumental in developing and implementing a Mentoring Program for water staff and was involved in a Sustainable Development team.