Technical Fact Sheet – 1,4-Dioxane
EPA’s drinking water equivalent level is 1 mg/L (EPA 2012). EPA has calculated a screening level of 0.46 µg/L for tap water, based on a 1 in 10-6 lifetime excess cancer risk (EPA 2017b). EPA established a 1-day health advisory of 4.0 milligrams per liter (mg/L) and a 10-day health advisory of 0.4 mg/L in drinking water for a 10-
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