Radionuclides · 2022
Gross Alpha in Signal Hill - City, Water Dept., CA tap water
Signal Hill - City, Water Dept., CA's 2022 Gross Alpha measurement is below the federal limit of 15 pCi/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average MWD's Surface Water | Not detected pCi/L | 15 pCi/L MCL |
Range MWD's Surface Water | 0–5 pCi/L | 15 pCi/L MCL |
Range Treated Groundwater | 0–4 pCi/L | 15 pCi/L MCL |
Average Treated Groundwater | 1.3 pCi/L | 15 pCi/L MCL |
Verbatim from Signal Hill - City, Water Dept., CA's 2022 Consumer Confidence Report — source document ↗
About Gross Alpha
Gross alpha particle activity — a combined measure of alpha-emitting radioactive substances.
Long-term exposure above the federal limit increases cancer risk.
How Signal Hill - City, Water Dept., CA compares
5 of the 215 CA systems measuring Gross Alpha on The Water Map have it at or above the federal limit:
Nearby systems also reporting Gross Alpha:
People also ask
+Is there Gross Alpha in Signal Hill - City, Water Dept., CA tap water?
Yes — Signal Hill - City, Water Dept., CA's 2022 Consumer Confidence Report lists Gross Alpha at 1.3 pCi/L. Signal Hill - City, Water Dept., CA's 2022 Gross Alpha measurement is below the federal limit of 15 pCi/L (MCL).
+What's the federal limit for Gross Alpha in drinking water?
The federal MCL for Gross Alpha is 15 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 Alpha?
Gross alpha particle activity — a combined measure of alpha-emitting radioactive substances. Long-term exposure above the federal limit increases cancer risk.
+Which other U.S. cities have Gross Alpha over the federal limit?
5 of the 215 CA systems on The Water Map measuring Gross Alpha report it at or above the federal limit. Examples include Crestline Village Cwd - Division 10 — Crestline, Ca, CA, Yosemite Spring Park Util Co — Coarsegold, Ca, CA, Valley of Enchantment Mwc — Crestline, Ca, CA.
+Where does this Gross Alpha measurement come from?
This page reproduces the Gross Alpha entry from the 2022 Consumer Confidence Report published by the Signal Hill - City, Water Dept., 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/signal-hill-city-water-dept/2022/source.