Disinfection byproducts · 2023
Perchlorate in Pasadena, CA tap water
Pasadena, CA's 2023 Perchlorate measurement is below the federal limit of 6 ug/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Range Pasadena Sources | 0–3.1 ug/L | 6 ug/L MCL |
Range MWD Weymouth Plant | Not detected ug/L | 6 ug/L MCL |
Average MWD Weymouth Plant | Not detected ug/L | 6 ug/L MCL |
Average Pasadena Sources | 1.3 ug/L | 6 ug/L MCL |
Verbatim from Pasadena, CA's 2023 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 Pasadena, CA compares
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People also ask
+Is there Perchlorate in Pasadena, CA tap water?
Yes — Pasadena, CA's 2023 Consumer Confidence Report lists Perchlorate at 1.3 ug/L. Pasadena, CA's 2023 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.
+Where does this Perchlorate measurement come from?
This page reproduces the Perchlorate entry from the 2023 Consumer Confidence Report published by the Pasadena, 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/pasadena/2023/source.