Disinfectants · 2024
Chlorine in Seattle, WA tap water
Seattle, WA's 2024 Chlorine measurement is below the federal limit of 4 mg/L (MRDLG).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Range System-wide | 0 mg/L | 4 mg/L MRDLG |
Average System-wide | 1 mg/L | 4 mg/L MRDLG |
Average System-wide | 1 mg/L | 4 mg/L MRDLG |
Range System-wide | 0 mg/L | 4 mg/L MRDLG |
Verbatim from Seattle, WA'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 Seattle, WA 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 Seattle, WA tap water?
Yes — Seattle, WA's 2024 Consumer Confidence Report lists Chlorine at 1 mg/L. Seattle, WA's 2024 Chlorine measurement is below the federal limit of 4 mg/L (MRDLG).
+What's the federal limit for Chlorine in drinking water?
The federal MRDLG 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, Columbus, OH, Albuquerque, NM.
+Where does this Chlorine measurement come from?
This page reproduces the Chlorine entry from the 2024 Consumer Confidence Report published by the Seattle, WA 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/wa/seattle/2024/source.