Inorganic chemicals · 2024
Sulfate in Ontario, CA tap water
Ontario, CA's 2024 Sulfate measurement is below the federal limit of 500 mg/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Reported level Imported Water (WFA w/ SAWCO) | 34 mg/L | 500 mg/L MCL |
Reported level Purchased Groundwater CDA 1 (870 Zone) | 6.4 mg/L | 500 mg/L MCL |
Reported level Purchased Groundwater JCSD (870 Zone) | 16 mg/L | 500 mg/L MCL |
Reported level Local Groundwater | 12 mg/L | 500 mg/L MCL |
Reported level Purchased Groundwater CDA 2 (1110 Zone) | 7.9 mg/L | 500 mg/L MCL |
Verbatim from Ontario, CA's 2024 Consumer Confidence Report — source document ↗
About Sulfate
A naturally occurring mineral from rock and soil.
No health-based federal limit; high levels can have a laxative effect and a bitter taste.
How Ontario, CA compares
3 of the 153 systems measuring Sulfate on The Water Map have it at or above the federal limit:
Nearby systems also reporting Sulfate:
People also ask
+Is there Sulfate in Ontario, CA tap water?
Yes — Ontario, CA's 2024 Consumer Confidence Report lists Sulfate at 34 mg/L. Ontario, CA's 2024 Sulfate measurement is below the federal limit of 500 mg/L (MCL).
+What's the federal limit for Sulfate in drinking water?
The federal MCL for Sulfate is 500 mg/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Sulfate?
A naturally occurring mineral from rock and soil. No health-based federal limit; high levels can have a laxative effect and a bitter taste.
+Which other U.S. cities have Sulfate over the federal limit?
3 of the 153 systems on The Water Map measuring Sulfate report it at or above the federal limit. Examples include Lakewood, CO, Santa Rosa, CA, Ventura, CA.
+Where does this Sulfate measurement come from?
This page reproduces the Sulfate 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.