VOCs & pesticides · 2025
Simazine in Contra Costa Water District, CA tap water
Contra Costa Water District, CA's 2025 Consumer Confidence Report tested for Simazine and reported no detectable amount.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample Source water | Not detected UG/L | 4 UG/L MCL |
Highest single sample Entry point | Not detected UG/L | 4 UG/L MCL |
Verbatim from Contra Costa Water District, CA's 2025 Consumer Confidence Report — source document ↗
How Contra Costa Water District, CA compares
2 of the 183 systems measuring Simazine on The Water Map have it at or above the federal limit:
Nearby systems also reporting Simazine:
People also ask
+Is there Simazine in Contra Costa Water District, CA tap water?
Contra Costa Water District, CA's 2025 Consumer Confidence Report tested for Simazine and found no detectable amount.
+What's the federal limit for Simazine in drinking water?
The federal MCL for Simazine is 4 UG/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+Which other U.S. cities have Simazine over the federal limit?
2 of the 183 systems on The Water Map measuring Simazine report it at or above the federal limit. Examples include Columbus, OH, Charlotte, NC.
+Where does this Simazine measurement come from?
This page reproduces the Simazine 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.