Is MANTECA, CITY OF required to publish a Consumer Confidence Report?

Yes. MANTECA, CITY OF 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 MANTECA, CITY OF’s next Consumer Confidence Report due?

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

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.

MANTECA, CA · San Joaquin County

MANTECA, CITY OF Water System

Consumer Confidence Report status

MANTECA, CITY OF 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 MANTECA, CITY OF.

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): CA3910005
System type: Community Water System
Population served: 84,928
Service connections: 27,552
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

MANTECA, CITY OF is one of 376 community water systems in California in the 10,001 to 100,000 people size category, serving 84,928 people from surface water.

As of August 1, 2026, its federal record holds 14 entries between 1987 and 2024, all of which EPA lists as closed.

Of the 14, 5 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves inorganic chemicals and the Miscellaneous Other Rules.

Violation history

Monitoring, Regular
—
Nitrate
January 1, 2024 – December 31, 2024
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
October 1, 2011 – December 31, 2011
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
October 1, 2009 – December 31, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2009 – June 30, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
July 1, 2008 – September 30, 2008
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Arsenic
July 1, 1987 – July 31, 1987
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Fluoride
July 1, 1987 – July 31, 1987
Archived
Monitoring, Regular
—
Fluoride
July 1, 1987 – July 31, 1987
Archived
Monitoring, Regular
—
Nitrate
July 1, 1987 – July 31, 1987
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Selenium
July 1, 1987 – July 31, 1987
Archived
Monitoring, Regular
—
Selenium
July 1, 1987 – July 31, 1987
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Arsenic
July 1, 1987 – July 31, 1987
Archived
Notification, Public
—
No contaminant on record
July 1, 1987 – July 31, 1987
Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2024 – December 31, 2024	Monitoring, Regular	Nitrate	—	Resolved
October 1, 2011 – December 31, 2011	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
October 1, 2009 – December 31, 2009	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
April 1, 2009 – June 30, 2009	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
July 1, 2008 – September 30, 2008	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
April 1, 2008 – June 30, 2008	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
July 1, 1987 – July 31, 1987	Monitoring, Regular	Arsenic	—	Archived
July 1, 1987 – July 31, 1987	Maximum Contaminant Level Violation, Single Sample	Fluoride	Health-based	Archived
July 1, 1987 – July 31, 1987	Monitoring, Regular	Fluoride	—	Archived
July 1, 1987 – July 31, 1987	Monitoring, Regular	Nitrate	—	Archived
July 1, 1987 – July 31, 1987	Maximum Contaminant Level Violation, Single Sample	Selenium	Health-based	Archived
July 1, 1987 – July 31, 1987	Monitoring, Regular	Selenium	—	Archived
July 1, 1987 – July 31, 1987	Maximum Contaminant Level Violation, Single Sample	Arsenic	Health-based	Archived
July 1, 1987 – July 31, 1987	Notification, Public	—	—	Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

November 20, 2013State Compliance achieved101 linked violations

Common questions

Is MANTECA, CITY OF required to publish a Consumer Confidence Report?: Yes. MANTECA, CITY OF 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 MANTECA, CITY OF’s next Consumer Confidence Report due?: MANTECA, CITY OF’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does MANTECA, CITY OF have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for MANTECA, CITY OF.
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

MONTROSS, GEORGE

209-456-8468

MANTECA, CA 95337