Metals · 2024
Manganese in San Mateo, CA tap water
San Mateo, CA's 2024 Manganese measurement is below the federal limit of 50 ug/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average SFPUC Water | Not detected ug/L | 50 ug/L MCL |
Range SFPUC Water | 0–2.7 ug/L | 50 ug/L MCL |
Verbatim from San Mateo, 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 San Mateo, CA compares
5 of the 112 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 San Mateo, CA tap water?
Yes — San Mateo, CA's 2024 Consumer Confidence Report lists Manganese at Not detected ug/L. San Mateo, 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 112 systems on The Water Map measuring Manganese report it at or above the federal limit. Examples include Green Bay, WI, Kent, WA, New Bedford, MA.
+Where does this Manganese measurement come from?
This page reproduces the Manganese entry from the 2024 Consumer Confidence Report published by the San Mateo, 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/san-mateo/2024/source.