Metals · 2025
Selenium in Brentwood, CA tap water
Brentwood, CA's 2025 Selenium measurement is below the federal limit of 50 UG/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average Source water | 9.4 UG/L | 50 UG/L MCL |
Highest single sample Source water | 17 UG/L | 50 UG/L MCL |
Verbatim from Brentwood, CA's 2025 Consumer Confidence Report — source document ↗
About Selenium
A trace element from natural deposits and industrial discharge.
Essential in tiny amounts, but long-term exposure above the federal limit can cause hair and fingernail loss and circulatory problems.
How Brentwood, CA compares
5 of the 240 systems measuring Selenium on The Water Map have it at or above the federal limit:
Nearby systems also reporting Selenium:
People also ask
+Is there Selenium in Brentwood, CA tap water?
Yes — Brentwood, CA's 2025 Consumer Confidence Report lists Selenium at 9.4 UG/L. Brentwood, CA's 2025 Selenium measurement is below the federal limit of 50 UG/L (MCL).
+What's the federal limit for Selenium in drinking water?
The federal MCL for Selenium 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 Selenium?
A trace element from natural deposits and industrial discharge. Essential in tiny amounts, but long-term exposure above the federal limit can cause hair and fingernail loss and circulatory problems.
+Which other U.S. cities have Selenium over the federal limit?
5 of the 240 systems on The Water Map measuring Selenium report it at or above the federal limit. Examples include Mcallen, TX, Birmingham, AL, Saticoy Country Club-city of Ventura, CA.
+Where does this Selenium measurement come from?
This page reproduces the Selenium entry from the 2025 Consumer Confidence Report published by the Brentwood, 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/brentwood/2025/source.