Empire State Adopts MCL for 1, 4-Dioxane, PFOA, and PFOS

On July 30, 2020, New York’s Public Health and Health Planning Council voted in support of maximum contaminant levels (MCLs) for PFOA and PFOS—the two most well-known per- and polyfluoroalkyl substances (PFAS). The Council voted to set the MCLs for both chemicals at 10 parts per trillion—among the lowest levels adopted by any state, and significantly lower than the U.S. EPA’s current guidance levels of 70 ppt.

Another chemical—1, 4-Dioxane—also has an MCL of 1 part per billion now. New York announced that this regulation …

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