Metals · 2024
Iron in Contra Costa Water District, CA tap water
Contra Costa Water District, CA's 2024 Consumer Confidence Report shows Iron at or above the federal limit (300 UG/L MCL). Measured value is 1.4× the threshold.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average Source water | 428 UG/L | 300 UG/L MCL |
Highest single sample Distribution | Not detected UG/L | 300 UG/L MCL |
Highest single sample Entry point | 460 UG/L | 300 UG/L MCL |
Average Entry point | 160 UG/L | 300 UG/L MCL |
Highest single sample Source water | 1400 UG/L | 300 UG/L MCL |
Verbatim from Contra Costa Water District, CA's 2024 Consumer Confidence Report — source document ↗
About Iron
A naturally occurring metal common in groundwater.
Regulated only as a secondary (cosmetic) standard; causes rusty color, staining, and metallic taste.
How Contra Costa Water District, CA compares
5 of the 223 systems measuring Iron on The Water Map have it at or above the federal limit:
Nearby systems also reporting Iron:
People also ask
+Is there Iron in Contra Costa Water District, CA tap water?
Yes — Contra Costa Water District, CA's 2024 Consumer Confidence Report lists Iron at 428 UG/L. Contra Costa Water District, CA's 2024 Consumer Confidence Report shows Iron at or above the federal limit (300 UG/L MCL). Measured value is 1.4× the threshold.
+What's the federal limit for Iron in drinking water?
The federal MCL for Iron is 300 UG/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Iron?
A naturally occurring metal common in groundwater. Regulated only as a secondary (cosmetic) standard; causes rusty color, staining, and metallic taste.
+Which other U.S. cities have Iron over the federal limit?
5 of the 223 systems on The Water Map measuring Iron report it at or above the federal limit. Examples include Salt Lake City, UT, Bakersfield, City of, CA, City of San Jose - Evg/edv/coy, CA.
+Where does this Iron measurement come from?
This page reproduces the Iron entry from the 2024 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/2024/source.