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

As of June 2026, EPA SDWIS records show 26 violation(s) across the community water systems serving Chowchilla, of which 16 are classified by the EPA as health-based. Most older violations have returned to compliance; see the per-system list.

Where does Chowchilla, CA tap water come from?

Chowchilla is served by 3 active community water system(s). Their primary sources, per EPA records, are: groundwater.

CA / Chowchilla

CA · Tap water records

Chowchilla tap water, in plain English

Here is what the EPA's own data shows about tap water in Chowchilla. According to EPA SDWIS data retrieved June 2026, Chowchilla is served by 3 active community water systems, together reported to serve about 19,272 people.

As of June 2026, EPA records show 26 violations across the community water system(s) serving Chowchilla, going back to the earliest EPA record. 16 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.

3

Community water systems
~19,272

People served (EPA-reported)
June 2026

EPA records reviewed through

What the EPA has on record, by system

Chowchilla City Water Dept

13,916 served · groundwater · PWSID CA2010001

Monitoring Lead and Copper Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times between January 1996 and January 2006. All have since returned to compliance, per EPA records.

Valley State Prison

3,173 served · groundwater · PWSID CA2010801

Health-based Arsenic: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 16 times between July 2014 and July 2015. The EPA record lists a level of 0.013 MG/L; the limit (MCL) is 0.01 MG/L. All have since returned to compliance, per EPA records.
Monitoring Revised Total Coliform Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 8 times between May 2016 and June 2016. All have since returned to compliance, per EPA records.

Central Ca Womens Facility

2,183 served · groundwater · PWSID CA2010800

As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.

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.