Other · 2024
Chromium in Ontario, CA tap water
Ontario, CA's 2024 Chromium measurement is below the federal limit of 50 UG/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average Source water | 5.625 UG/L | 50 UG/L MCL |
Highest single sample Source water | 6.5 UG/L | 50 UG/L MCL |
Verbatim from Ontario, CA's 2024 Consumer Confidence Report — source document ↗
How Ontario, CA compares
2 of the 169 systems measuring Chromium on The Water Map have it at or above the federal limit:
Nearby systems also reporting Chromium:
People also ask
+Is there Chromium in Ontario, CA tap water?
Yes — Ontario, CA's 2024 Consumer Confidence Report lists Chromium at 5.625 UG/L. Ontario, CA's 2024 Chromium measurement is below the federal limit of 50 UG/L (MCL).
+What's the federal limit for Chromium in drinking water?
The federal MCL for Chromium is 50 UG/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+Which other U.S. cities have Chromium over the federal limit?
2 of the 169 systems on The Water Map measuring Chromium report it at or above the federal limit. Examples include Glendale-city, Water Dept., CA, Glendale-city, Water Dept., CA.
+Where does this Chromium measurement come from?
This page reproduces the Chromium entry from the 2024 Consumer Confidence Report published by the Ontario, 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/ontario/2024/source.