Radionuclides · 2025
Gross Beta Particle Activity in Brentwood, CA tap water
Brentwood, CA's 2025 Gross Beta Particle Activity measurement is below the federal limit of 50 PCI/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average Source water | 4.243333333333333 PCI/L | 50 PCI/L MCL |
Highest single sample Source water | 8.55 PCI/L | 50 PCI/L MCL |
Verbatim from Brentwood, CA's 2025 Consumer Confidence Report — source document ↗
About Gross Beta Particle Activity
Gross beta particle activity — a combined measure of beta-emitting radioactive substances.
Long-term exposure above the federal screening level increases cancer risk.
How Brentwood, CA compares
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People also ask
+Is there Gross Beta Particle Activity in Brentwood, CA tap water?
Yes — Brentwood, CA's 2025 Consumer Confidence Report lists Gross Beta Particle Activity at 4.243333333333333 PCI/L. Brentwood, CA's 2025 Gross Beta Particle Activity measurement is below the federal limit of 50 PCI/L (MCL).
+What's the federal limit for Gross Beta Particle Activity in drinking water?
The federal MCL for Gross Beta Particle Activity is 50 PCI/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Gross Beta Particle Activity?
Gross beta particle activity — a combined measure of beta-emitting radioactive substances. Long-term exposure above the federal screening level increases cancer risk.
+Where does this Gross Beta Particle Activity measurement come from?
This page reproduces the Gross Beta Particle Activity 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.