Radionuclides · 2024
Gross Alpha in Boulder, CO tap water
Boulder, CO's 2024 Gross Alpha measurement is below the federal limit of 15 pCi/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Reported level National City Well 4 | Not detected pCi/L | 15 pCi/L MCL |
Reported level SD Formation Wells 1 - 11 | 0–11.1 pCi/L | 15 pCi/L MCL |
Reported level Lake Skinner Outlet (Aqueduct) | 0–3.6 pCi/L | 15 pCi/L MCL |
Reported level Sweetwater Reservoir | Not detected pCi/L | 15 pCi/L MCL |
Reported level National City Well 3 | Not detected pCi/L | 15 pCi/L MCL |
Reported level SD Formation Wells 1 - 11 | 3.9 pCi/L | 15 pCi/L MCL |
Reported level Lake Skinner Outlet (Aqueduct) | Not detected pCi/L | 15 pCi/L MCL |
Reported level National City Well 2 | Not detected pCi/L | 15 pCi/L MCL |
Verbatim from Boulder, CO's 2024 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 Boulder, CO compares
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People also ask
+Is there Gross Alpha in Boulder, CO tap water?
Yes — Boulder, CO's 2024 Consumer Confidence Report lists Gross Alpha at 0–11.1 pCi/L. Boulder, CO's 2024 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.
+Where does this Gross Alpha measurement come from?
This page reproduces the Gross Alpha entry from the 2024 Consumer Confidence Report published by the Boulder, CO 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/co/boulder/2024/source.