Inorganic chemicals · 2024
Fluoride in San Mateo, CA tap water
San Mateo, CA's 2024 Fluoride measurement is below the federal limit of 2 mg/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Range System-wide | 0.5–0.8 mg/L | 2 mg/L MCL |
Average System-wide | 0.7 mg/L | 2 mg/L MCL |
Verbatim from San Mateo, CA's 2024 Consumer Confidence Report — source document ↗
About Fluoride
A mineral often added to drinking water to help prevent tooth decay.
Beneficial at low levels, but long-term exposure above the federal limit can cause bone disease and tooth mottling.
How San Mateo, CA compares
5 of the 386 systems measuring Fluoride on The Water Map have it at or above the federal limit:
Nearby systems also reporting Fluoride:
People also ask
+Is there Fluoride in San Mateo, CA tap water?
Yes — San Mateo, CA's 2024 Consumer Confidence Report lists Fluoride at 0.7 mg/L. San Mateo, CA's 2024 Fluoride measurement is below the federal limit of 2 mg/L (MCL).
+What's the federal limit for Fluoride in drinking water?
The federal MCL for Fluoride is 2 mg/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Fluoride?
A mineral often added to drinking water to help prevent tooth decay. Beneficial at low levels, but long-term exposure above the federal limit can cause bone disease and tooth mottling.
+Which other U.S. cities have Fluoride over the federal limit?
5 of the 386 systems on The Water Map measuring Fluoride report it at or above the federal limit. Examples include High Point, NC, Columbus, OH, Hollywood, FL.
+Where does this Fluoride measurement come from?
This page reproduces the Fluoride entry from the 2024 Consumer Confidence Report published by the 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/san-mateo/2024/source.