Metals · 2025
Lithium in Rincon Del Diablo MWD (id-1), CA tap water
Rincon Del Diablo MWD (id-1), CA's 2025 report shows Lithium detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample Entry point | 43 mg/L | None set |
Verbatim from Rincon Del Diablo MWD (id-1), CA's 2025 Consumer Confidence Report — source document ↗
About Lithium
A naturally occurring element found in some groundwater.
No enforceable federal limit; on the EPA contaminant candidate list for further study.
How Rincon Del Diablo MWD (id-1), CA compares
5 of the 159 systems measuring Lithium on The Water Map have it at or above the federal limit:
Nearby systems also reporting Lithium:
People also ask
+Is there Lithium in Rincon Del Diablo MWD (id-1), CA tap water?
Yes — Rincon Del Diablo MWD (id-1), CA's 2025 Consumer Confidence Report lists Lithium at 43 mg/L. Rincon Del Diablo MWD (id-1), CA's 2025 report shows Lithium detected, but the EPA has not set an enforceable federal limit for it.
+What's the federal limit for Lithium in drinking water?
The EPA has not set an enforceable federal limit for Lithium. Utilities still report any measured levels in their annual Consumer Confidence Report.
+What is Lithium?
A naturally occurring element found in some groundwater. No enforceable federal limit; on the EPA contaminant candidate list for further study.
+Which other U.S. cities have Lithium over the federal limit?
5 of the 159 systems on The Water Map measuring Lithium report it at or above the federal limit. Examples include Lubbock, TX, Pomona - City, Water Dept., CA, Chula Vista Otay, CA.
+Where does this Lithium measurement come from?
This page reproduces the Lithium entry from the 2025 Consumer Confidence Report published by the Rincon Del Diablo MWD (id-1), 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/rincon-del-diablo-mwd-id-1/2025/source.