Metals · 2024
Manganese in Contra Costa Water District, CA tap water
Contra Costa Water District, CA's 2024 Manganese measurement is below the federal limit of 50 UG/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample Entry point | 49 UG/L | 50 UG/L MCL |
Highest single sample Distribution | Not detected UG/L | 50 UG/L MCL |
Average Entry point | 24.2 UG/L | 50 UG/L MCL |
Highest single sample Source water | 56 UG/L | 50 UG/L MCL |
Average Source water | 35.8 UG/L | 50 UG/L MCL |
Verbatim from Contra Costa Water District, CA's 2024 Consumer Confidence Report — source document ↗
About Manganese
A naturally occurring metal from soil and rock.
No enforceable federal limit; high levels stain fixtures and laundry and can affect taste, with a health advisory for infants.
How Contra Costa Water District, CA compares
5 of the 231 systems measuring Manganese on The Water Map have it at or above the federal limit:
Nearby systems also reporting Manganese:
People also ask
+Is there Manganese in Contra Costa Water District, CA tap water?
Yes — Contra Costa Water District, CA's 2024 Consumer Confidence Report lists Manganese at 35.8 UG/L. Contra Costa Water District, CA's 2024 Manganese measurement is below the federal limit of 50 UG/L (MCL).
+What's the federal limit for Manganese in drinking water?
The federal MCL for Manganese is 50 UG/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Manganese?
A naturally occurring metal from soil and rock. No enforceable federal limit; high levels stain fixtures and laundry and can affect taste, with a health advisory for infants.
+Which other U.S. cities have Manganese over the federal limit?
5 of the 231 systems on The Water Map measuring Manganese report it at or above the federal limit. Examples include Green Bay, WI, Mesa Del Toro Mwc, CA, Mesa Del Toro Mwc, CA.
+Where does this Manganese measurement come from?
This page reproduces the Manganese 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.