Disinfectants · 2024
Chloramine in California Water Service - San Mateo, CA tap water
California Water Service - San Mateo, CA's 2024 Chloramine measurement is below the federal limit of 4 mg/L (MRDL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Range System-wide | 1.1–3.9 mg/L | 4 mg/L MRDL |
Average System-wide | 2.8 mg/L | 4 mg/L MRDL |
Verbatim from California Water Service - San Mateo, CA'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.
How California Water Service - San Mateo, CA compares
5 of the 43 systems measuring Chloramine on The Water Map have it at or above the federal limit:
Nearby systems also reporting Chloramine:
People also ask
+Is there Chloramine in California Water Service - San Mateo, CA tap water?
Yes — California Water Service - San Mateo, CA's 2024 Consumer Confidence Report lists Chloramine at 2.8 mg/L. California Water Service - San Mateo, CA's 2024 Chloramine measurement is below the federal limit of 4 mg/L (MRDL).
+What's the federal limit for Chloramine in drinking water?
The federal MRDL 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.
+Which other U.S. cities have Chloramine over the federal limit?
5 of the 43 systems on The Water Map measuring Chloramine report it at or above the federal limit. Examples include Suffolk, VA, Palm Bay, FL, Pembroke Pines, FL.
+Where does this Chloramine measurement come from?
This page reproduces the Chloramine entry from the 2024 Consumer Confidence Report published by the California Water Service - San Mateo, CA 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/ca/california-water-service-san-mateo/2024/source.