Metals · 2024

Arsenic in Boulder, CO tap water

Within the federal limit· 0.3× the limit

Boulder, CO's 2024 Arsenic measurement is below the federal limit.

The measurement

StatisticValue
Reported level
SD Formation Wells 1 - 11
0–3.4 ug/L
Reported level
Lake Skinner Outlet (Aqueduct)
Not detected ug/L
Reported level
Sweetwater Reservoir
0–1.9 ug/L
Reported level
National City Well 2
Not detected ug/L
Reported level
National City Well 3
Not detected ug/L
Reported level
National City Well 4
Not detected ug/L
Reported level
SD Formation Wells 1 - 11
Not detected ug/L
Reported level
Sweetwater Reservoir
1.6 ug/L
Reported level
Treated Sweetwater Authority Drinking Water
Not detected ug/L

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.

+What's the federal limit for Arsenic in drinking water?

The EPA has not set an enforceable federal limit for Arsenic. Utilities still report any measured levels in their annual Consumer Confidence Report.

+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.

Full report
All Boulder, CO water-quality data →
Every contaminant measured in the 2024 report.
Contaminant pillar
Arsenic across the U.S. →
Every public water system measuring Arsenic, ranked.