Metals · 2024
Boron in California Water Service - San Mateo, CA tap water
California Water Service - San Mateo, CA's 2024 Boron measurement is below the federal limit of 1 mg/L (NL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average SFPUC Water | 0.04 mg/L | 1 mg/L NL |
Range SFPUC Water | 0.02–0.07 mg/L | 1 mg/L NL |
Verbatim from California Water Service - San Mateo, CA's 2024 Consumer Confidence Report — source document ↗
About Boron
A naturally occurring element from rock and soil.
No enforceable federal limit; the EPA has issued a health advisory level.
How California Water Service - San Mateo, CA compares
5 of the 128 systems measuring Boron on The Water Map have it at or above the federal limit:
Nearby systems also reporting Boron:
People also ask
+Is there Boron in California Water Service - San Mateo, CA tap water?
Yes — California Water Service - San Mateo, CA's 2024 Consumer Confidence Report lists Boron at 0.04 mg/L. California Water Service - San Mateo, CA's 2024 Boron measurement is below the federal limit of 1 mg/L (NL).
+What's the federal limit for Boron in drinking water?
The federal NL for Boron is 1 mg/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Boron?
A naturally occurring element from rock and soil. No enforceable federal limit; the EPA has issued a health advisory level.
+Which other U.S. cities have Boron over the federal limit?
5 of the 128 systems on The Water Map measuring Boron report it at or above the federal limit. Examples include Inglewood, CA, Covina-city, Water Dept., CA, Pomona - City, Water Dept., CA.
+Where does this Boron measurement come from?
This page reproduces the Boron entry from the 2024 Consumer Confidence Report published by the California Water Service - 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/california-water-service-san-mateo/2024/source.