Metals · 2026
Arsenic in City of Vacaville, CA tap water
City of Vacaville, CA's 2026 Arsenic measurement is below the federal limit of 10 UG/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average Source water | 2.6714285714285713 UG/L | 10 UG/L MCL |
Highest single sample Source water | 3.8 UG/L | 10 UG/L MCL |
Highest single sample Other | Not detected UG/L | 10 UG/L MCL |
Verbatim from City of Vacaville, CA's 2026 Consumer Confidence Report — source document ↗
About Arsenic
A naturally occurring element that also enters water from industry and agriculture.
A known human carcinogen; long-term exposure is linked to skin, bladder, and lung cancer.
How City of Vacaville, CA compares
5 of the 287 systems measuring Arsenic on The Water Map have it at or above the federal limit:
Nearby systems also reporting Arsenic:
People also ask
+Is there Arsenic in City of Vacaville, CA tap water?
Yes — City of Vacaville, CA's 2026 Consumer Confidence Report lists Arsenic at 2.6714285714285713 UG/L. City of Vacaville, CA's 2026 Arsenic measurement is below the federal limit of 10 UG/L (MCL).
+What's the federal limit for Arsenic in drinking water?
The federal MCL for Arsenic is 10 UG/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Arsenic?
A naturally occurring element that also enters water from industry and agriculture. A known human carcinogen; long-term exposure is linked to skin, bladder, and lung cancer.
+Which other U.S. cities have Arsenic over the federal limit?
5 of the 287 systems on The Water Map measuring Arsenic report it at or above the federal limit. Examples include Albuquerque, NM, Mesa Del Toro Mwc, CA, Beaches Water, MD.
+Where does this Arsenic measurement come from?
This page reproduces the Arsenic entry from the 2026 Consumer Confidence Report published by the City of Vacaville, 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/vacaville/2026/source.