Disinfection byproducts · 2024
Perchlorate in Ontario Municipal Utilities Company, CA tap water
Ontario Municipal Utilities Company, CA's 2024 Perchlorate measurement is below the federal limit of 6 UG/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample Source water | 5.4 UG/L | 6 UG/L MCL |
Highest single sample Other | 3.3 UG/L | 6 UG/L MCL |
Average Other | 3.04 UG/L | 6 UG/L MCL |
Average Entry point | 0.24833333333333335 UG/L | 6 UG/L MCL |
Highest single sample Entry point | 1.8 UG/L | 6 UG/L MCL |
Average Source water | 2.327272727272727 UG/L | 6 UG/L MCL |
Verbatim from Ontario Municipal Utilities Company, CA's 2024 Consumer Confidence Report — source document ↗
About Perchlorate
A chemical used in rocket fuel and fireworks that can also form during disinfection.
Can interfere with thyroid hormone production; has no national enforceable limit but is regulated in some states.
How Ontario Municipal Utilities Company, CA compares
5 of the 189 systems measuring Perchlorate on The Water Map have it at or above the federal limit:
Nearby systems also reporting Perchlorate:
People also ask
+Is there Perchlorate in Ontario Municipal Utilities Company, CA tap water?
Yes — Ontario Municipal Utilities Company, CA's 2024 Consumer Confidence Report lists Perchlorate at 3.04 UG/L. Ontario Municipal Utilities Company, CA's 2024 Perchlorate measurement is below the federal limit of 6 UG/L (MCL).
+What's the federal limit for Perchlorate in drinking water?
The federal MCL for Perchlorate is 6 UG/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Perchlorate?
A chemical used in rocket fuel and fireworks that can also form during disinfection. Can interfere with thyroid hormone production; has no national enforceable limit but is regulated in some states.
+Which other U.S. cities have Perchlorate over the federal limit?
5 of the 189 systems on The Water Map measuring Perchlorate report it at or above the federal limit. Examples include Rialto, City of, CA, Rialto, City of, CA, Rialto, City of, CA.
+Where does this Perchlorate measurement come from?
This page reproduces the Perchlorate entry from the 2024 Consumer Confidence Report published by the Ontario Municipal Utilities Company, 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-municipal-utilities-company/2024/source.