Physical & aggregate · 2026
Specific Conductance in City of Hayward, CA tap water
City of Hayward, CA's 2026 Specific Conductance measurement is below the federal limit of 1600 UMHO/CM (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample Source water | 1000 UMHO/CM | 1600 UMHO/CM MCL |
Average Source water | 862.5 UMHO/CM | 1600 UMHO/CM MCL |
Verbatim from City of Hayward, CA's 2026 Consumer Confidence Report — source document ↗
About Specific Conductance
A measure of how well water conducts electricity, which tracks dissolved mineral content.
Not federally regulated for health; used as a proxy for total dissolved solids.
How City of Hayward, CA compares
5 of the 213 systems measuring Specific Conductance on The Water Map have it at or above the federal limit:
Nearby systems also reporting Specific Conductance:
People also ask
+Is there Specific Conductance in City of Hayward, CA tap water?
Yes — City of Hayward, CA's 2026 Consumer Confidence Report lists Specific Conductance at 862.5 UMHO/CM. City of Hayward, CA's 2026 Specific Conductance measurement is below the federal limit of 1600 UMHO/CM (MCL).
+What's the federal limit for Specific Conductance in drinking water?
The federal MCL for Specific Conductance is 1600 UMHO/CM. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Specific Conductance?
A measure of how well water conducts electricity, which tracks dissolved mineral content. Not federally regulated for health; used as a proxy for total dissolved solids.
+Which other U.S. cities have Specific Conductance over the federal limit?
5 of the 213 systems on The Water Map measuring Specific Conductance report it at or above the federal limit. Examples include Inglewood, CA, El Cajon, CA, Overland Park, KS.
+Where does this Specific Conductance measurement come from?
This page reproduces the Specific Conductance entry from the 2026 Consumer Confidence Report published by the City of Hayward, 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/hayward/2026/source.