Metals · 2024
Arsenic in Boulder, CO tap water
Boulder, CO's 2024 Arsenic measurement is below the federal limit of 10 ug/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Reported level SD Formation Wells 1 - 11 | 0–3.4 ug/L | 10 ug/L MCL |
Reported level Lake Skinner Outlet (Aqueduct) | Not detected ug/L | 10 ug/L MCL |
Reported level Sweetwater Reservoir | 0–1.9 ug/L | 10 ug/L MCL |
Reported level National City Well 2 | Not detected ug/L | 10 ug/L MCL |
Reported level National City Well 3 | Not detected ug/L | 10 ug/L MCL |
Reported level National City Well 4 | Not detected ug/L | 10 ug/L MCL |
Reported level SD Formation Wells 1 - 11 | Not detected ug/L | 10 ug/L MCL |
Reported level Sweetwater Reservoir | 1.6 ug/L | 10 ug/L MCL |
Reported level Treated Sweetwater Authority Drinking Water | Not detected ug/L | 10 ug/L MCL |
Verbatim from Boulder, CO's 2024 Consumer Confidence Report — source document ↗
About Arsenic
A naturally occurring element that also enters water from industry and agriculture.
A known human carcinogen; long-term exposure is linked to skin, bladder, and lung cancer.
How Boulder, CO compares
Nearby systems also reporting Arsenic:
People also ask
+Is there Arsenic in Boulder, CO tap water?
Yes — Boulder, CO's 2024 Consumer Confidence Report lists Arsenic at 0–3.4 ug/L. Boulder, CO's 2024 Arsenic measurement is below the federal limit of 10 ug/L (MCL).
+What's the federal limit for Arsenic in drinking water?
The federal MCL for Arsenic is 10 ug/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Arsenic?
A naturally occurring element that also enters water from industry and agriculture. A known human carcinogen; long-term exposure is linked to skin, bladder, and lung cancer.
+Where does this Arsenic measurement come from?
This page reproduces the Arsenic 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.