Disinfectants · 2024
Chloramine in St Louis, MO tap water
St Louis, MO's 2024 Chloramine level is between 80% and 100% of the federal limit (4 mg/L MCL) — measured but not in violation.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample System-wide | 3.59 mg/L | 4 mg/L MCL |
Range Range Detected | 2.04–3.59 mg/L | 4 mg/L MCL |
Highest single sample System-wide | 3.66 mg/L | 4 mg/L MCL |
Range Range Detected | 1.37–3.66 mg/L | 4 mg/L MCL |
Verbatim from St Louis, MO's 2024 Consumer Confidence Report — source document ↗
About Chloramine
A longer-lasting disinfectant made by combining chlorine with ammonia.
Holds disinfection further into the pipe network, but is regulated under the same residual-disinfectant cap as chlorine.
People also ask
+Is there Chloramine in St Louis, MO tap water?
Yes — St Louis, MO's 2024 Consumer Confidence Report lists Chloramine at 3.66 mg/L. St Louis, MO's 2024 Chloramine level is between 80% and 100% of the federal limit (4 mg/L MCL) — measured but not in violation.
+What's the federal limit for Chloramine in drinking water?
The federal MCL for Chloramine 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 Chloramine?
A longer-lasting disinfectant made by combining chlorine with ammonia. Holds disinfection further into the pipe network, but is regulated under the same residual-disinfectant cap as chlorine.
+Where does this Chloramine measurement come from?
This page reproduces the Chloramine entry from the 2024 Consumer Confidence Report published by the St Louis, MO 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/mo/st-louis/2024/source.