Other · 2025
Heptachlor Epoxide in Contra Costa Water District, CA tap water
Contra Costa Water District, CA's 2025 Consumer Confidence Report tested for Heptachlor Epoxide and reported no detectable amount.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample Source water | Not detected UG/L | 0.01 UG/L MCL |
Highest single sample Entry point | Not detected UG/L | 0.01 UG/L MCL |
Verbatim from Contra Costa Water District, CA's 2025 Consumer Confidence Report — source document ↗
How Contra Costa Water District, CA compares
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People also ask
+Is there Heptachlor Epoxide in Contra Costa Water District, CA tap water?
Contra Costa Water District, CA's 2025 Consumer Confidence Report tested for Heptachlor Epoxide and found no detectable amount.
+What's the federal limit for Heptachlor Epoxide in drinking water?
The federal MCL for Heptachlor Epoxide is 0.01 UG/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+Where does this Heptachlor Epoxide measurement come from?
This page reproduces the Heptachlor Epoxide entry from the 2025 Consumer Confidence Report published by the Contra Costa Water District, CA water utility — the annual drinking-water report every U.S. utility is required by federal law to publish. The original source document is archived at /water/ca/contra-costa-water-district/2025/source.