Disinfectants · 2024
Chlorine in Boulder, CO tap water
Boulder, CO's 2024 Chlorine measurement is below the federal limit of 4 mg/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Reported level Treated1 Sweetwater Authority Drinking Water | 0–956 ug/L | None set |
Reported level Treated1 Sweetwater Authority Drinking Water | Not detected ug/L | None set |
Reported level System-wide | 0.22–1.31 mg/L | 4 mg/L MCL |
Verbatim from Boulder, CO's 2024 Consumer Confidence Report — source document ↗
About Chlorine
A disinfectant added to drinking water to kill bacteria and viruses.
Effective and necessary, but high residual levels can cause taste and odor issues; the EPA caps the residual disinfectant level.
How Boulder, CO compares
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People also ask
+Is there Chlorine in Boulder, CO tap water?
Yes — Boulder, CO's 2024 Consumer Confidence Report lists Chlorine at 0–956 ug/L. Boulder, CO's 2024 Chlorine measurement is below the federal limit of 4 mg/L (MCL).
+What's the federal limit for Chlorine in drinking water?
The federal MCL for Chlorine is 4 mg/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Chlorine?
A disinfectant added to drinking water to kill bacteria and viruses. Effective and necessary, but high residual levels can cause taste and odor issues; the EPA caps the residual disinfectant level.
+Where does this Chlorine measurement come from?
This page reproduces the Chlorine 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.