Does Keyes, CA tap water have any EPA-reported violations?

As of June 2026, EPA SDWIS records show 110 violation(s) across the community water systems serving Keyes, of which 110 are classified by the EPA as health-based. Most older violations have returned to compliance; see the per-system list.

Where does Keyes, CA tap water come from?

Keyes is served by 1 active community water system(s). Their primary sources, per EPA records, are: groundwater.

CA / Keyes

CA · Tap water records

Keyes tap water, in plain English

Here is what the EPA's own data shows about tap water in Keyes. According to EPA SDWIS data retrieved June 2026, Keyes is served by 1 active community water system, together reported to serve about 5,672 people.

As of June 2026, EPA records show 110 violations across the community water system(s) serving Keyes, going back to the earliest EPA record. 110 of these are classified by the EPA as health-based (a contaminant recorded above the limit the EPA tracks); the rest are monitoring or reporting violations. Each is listed by system below, with its status.

1

Community water system
~5,672

People served (EPA-reported)
June 2026

EPA records reviewed through

What the EPA has on record, by system

Keyes Community Services Dist.

5,672 served · groundwater · PWSID CA5010009

Health-based Arsenic: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 110 times between July 2006 and January 2020. The EPA record lists a level of 0.0133 MG/L; the limit (MCL) is 0.01 MG/L. All have since returned to compliance, per EPA records.

What this means

A health-based violation means a contaminant was recorded above the limit the EPA tracks for it. A monitoring or reporting violation means a required test or report was late or missed — not that a contaminant was measured above a limit. “Returned to compliance” means the EPA recorded the issue as resolved.

This page summarizes the EPA's own records and does not assess whether your water is safe to drink. For the most current details, you can verify every record directly with the EPA, and contact your water system with questions.

Source: U.S. EPA Envirofacts SDWIS, retrieved June 2026. Records cover the EPA's full reporting history for these systems. Verify at EPA ECHO.