Physical & aggregate · 2025
Alkalinity in City of Cupertino, CA tap water
City of Cupertino, CA's 2025 report shows Alkalinity detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample Source water | 260 MG/L | None set |
Average Source water | 167.5 MG/L | None set |
Verbatim from City of Cupertino, CA's 2025 Consumer Confidence Report — source document ↗
About Alkalinity
A measure of the water's capacity to neutralize acids.
Not federally regulated for health; relevant to corrosion control and treatment.
How City of Cupertino, CA compares
Nearby systems also reporting Alkalinity:
People also ask
+Is there Alkalinity in City of Cupertino, CA tap water?
Yes — City of Cupertino, CA's 2025 Consumer Confidence Report lists Alkalinity at 167.5 MG/L. City of Cupertino, CA's 2025 report shows Alkalinity detected, but the EPA has not set an enforceable federal limit for it.
+What's the federal limit for Alkalinity in drinking water?
The EPA has not set an enforceable federal limit for Alkalinity. Utilities still report any measured levels in their annual Consumer Confidence Report.
+What is Alkalinity?
A measure of the water's capacity to neutralize acids. Not federally regulated for health; relevant to corrosion control and treatment.
+Where does this Alkalinity measurement come from?
This page reproduces the Alkalinity entry from the 2025 Consumer Confidence Report published by the City of Cupertino, 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/cupertino/2025/source.