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AMWA submitted comments to EPA on the agency's supplemental analysis to the TSCA risk evaluation for 1,4-dioxane November 30. AMWA joined with the American Water Works Association in August of 2019 to provide comments on the initial draft risk assessment. These most recent comments are similar to those that AMWA has made for trichloroethylene and perchloroethylene, urging the agency to include drinking water exposure within the EPA's risk assessments under TSCA. Currently, the agency has avoided considering the drinking water pathway due to its regulation under SDWA. The agency only gave the public 20 days for review. Along with these high-level comments, AMWA's letter asks for a 30-day extension to fully engage our membership.