Public Water Partners

ANTIOCH, CA · Contra Costa County

CITY OF ANTIOCH Water System

Consumer Confidence Report status

CITY OF ANTIOCH must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for CITY OF ANTIOCH.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace California’s official records. Always confirm current status with California before making decisions based on this information.

System facts

System ID (PWSID)
CA0710001
System type
Community Water System
Population served
115,074
Service connections
33,597
Ownership
local government
Water source
surface water (rivers, lakes, or reservoirs)

CITY OF ANTIOCH is one of 92 community water systems in California in the more than 100,000 people size category, serving 115,074 people from surface water.

As of August 1, 2026, its federal record holds 1 entry in 1992, all of which EPA lists as closed. Nothing has been added since 1992.

None of the 1 are monitoring or reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset; these involve water-quality, treatment, or public-notice findings instead. The record involves the Total Coliform Rules.

Violation history

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    January 1, 1992 – January 31, 1992

    Resolved

Resolved addressed and confirmed by the state

Enforcement actions

Common questions

Is CITY OF ANTIOCH required to publish a Consumer Confidence Report?

Yes. CITY OF ANTIOCH is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is CITY OF ANTIOCH’s next Consumer Confidence Report due?

CITY OF ANTIOCH’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does CITY OF ANTIOCH have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for CITY OF ANTIOCH.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

WOODLAND, BENJAMIN M.

916-767-7536

ANTIOCH, CA 94531-5007