Disinfectants · 2025
Chlorine in Columbus, OH tap water
Columbus, OH's 2025 Consumer Confidence Report shows Chlorine at or above the federal limit (4 mg/L MCL). Measured value is 506.3× the threshold.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Reported level Hap Cremean Water Plant | 1.4 mg/L | 4 mg/L MCL |
Reported level Dublin Road Water Plant | 1.44 mg/L | 4 mg/L MCL |
Reported level When we checked | 2025 mg/L | 4 mg/L MCL |
Reported level Parsons Avenue Water Plant | 0.97 mg/L | 4 mg/L MCL |
Range Dublin Road Water Plant | 1.28–1.59 mg/L | 4 mg/L MCL |
Range Hap Cremean Water Plant | 1.2–1.47 mg/L | 4 mg/L MCL |
Range Parsons Avenue Water Plant | 0.87–1.04 mg/L | 4 mg/L MCL |
Verbatim from Columbus, OH's 2025 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 Columbus, OH compares
5 of the 298 systems measuring Chlorine on The Water Map have it at or above the federal limit:
Nearby systems also reporting Chlorine:
People also ask
+Is there Chlorine in Columbus, OH tap water?
Yes — Columbus, OH's 2025 Consumer Confidence Report lists Chlorine at 2025 mg/L. Columbus, OH's 2025 Consumer Confidence Report shows Chlorine at or above the federal limit (4 mg/L MCL). Measured value is 506.3× the threshold.
+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.
+Which other U.S. cities have Chlorine over the federal limit?
5 of the 298 systems on The Water Map measuring Chlorine report it at or above the federal limit. Examples include Pittsburgh, PA, Albuquerque, NM, Chapel Hill Water System, MD.
+Where does this Chlorine measurement come from?
This page reproduces the Chlorine entry from the 2025 Consumer Confidence Report published by the Columbus, OH 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/oh/columbus/2025/source.