Radionuclides · 2022
Gross Alpha in Norwalk - City, Water Dept. — Norwalk, Ca, CA tap water
Norwalk - City, Water Dept. — Norwalk, Ca, CA's 2022 report shows Gross Alpha detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Range MWD's Surface Water | 0–5 | 15 MCL |
Average Groundwater | 4.59 | 15 MCL |
Average MWD's Surface Water | Not detected | 15 MCL |
Range Groundwater | 4.55–4.63 | 15 MCL |
Verbatim from Norwalk - City, Water Dept. — Norwalk, Ca, 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 Norwalk - City, Water Dept. — Norwalk, Ca, CA compares
5 of the 839 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 Norwalk - City, Water Dept. — Norwalk, Ca, CA tap water?
Yes — Norwalk - City, Water Dept. — Norwalk, Ca, CA's 2022 Consumer Confidence Report lists Gross Alpha at 4.59. Norwalk - City, Water Dept. — Norwalk, Ca, CA's 2022 report shows Gross Alpha detected, but the EPA has not set an enforceable federal limit for it.
+What's the federal limit for Gross Alpha in drinking water?
The federal MCL for Gross Alpha is 15 . 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 839 systems on The Water Map measuring Gross Alpha report it at or above the federal limit. Examples include Oceano Comm Services Dist. — Oceano, Ca, CA, Crestline Village Cwd - Division 10 — Crestline, Ca, CA, Indian Hills Camp — Jamul, 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 Norwalk - City, Water Dept. — Norwalk, Ca, 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/norwalk-city-water-dept-norwalk-ca/2022/source.