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Heptachlor Epoxide in U.S. tap water
26 public water systems across 6 U.S. states report Heptachlor Epoxide in their annual Consumer Confidence Report. None currently sit at or above the federal limit.
Within the federal limit (26)
Frequently asked
+What is Heptachlor Epoxide?
Heptachlor Epoxide is a contaminant some U.S. public water utilities measure and report in their annual Consumer Confidence Report.
+What is the federal limit for Heptachlor Epoxide in drinking water?
The federal MCLG for Heptachlor Epoxide is 0 ng/L. The EPA enforces this against the regulated reporting statistic (typically a running annual average or 90th percentile), not a single-sample spike.
+How many U.S. water systems have Heptachlor Epoxide over the federal limit?
Zero of the 26 public water systems in The Water Map dataset currently report Heptachlor Epoxide at or above its federal limit.
+How can I check if Heptachlor Epoxide is in my city's tap water?
Search your city on The Water Map (https://www.thewatermap.com/) or browse the list on this page. Every U.S. public water utility is required to publish an annual Consumer Confidence Report that lists every contaminant it measured, including Heptachlor Epoxide.