Is RANCHO SAN JOAQUIN MWC required to publish a Consumer Confidence Report?

Yes. RANCHO SAN JOAQUIN MWC 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 RANCHO SAN JOAQUIN MWC’s next Consumer Confidence Report due?

RANCHO SAN JOAQUIN MWC’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.

HOLLISTER, CA · San Benito County

RANCHO SAN JOAQUIN MWC Water System

Consumer Confidence Report status

RANCHO SAN JOAQUIN MWC 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 1 open health-based violation for RANCHO SAN JOAQUIN MWC.

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): CA3500581
System type: Community Water System
Population served: 914
Service connections: 30
Ownership: privately owned
Water source: groundwater (wells)

RANCHO SAN JOAQUIN MWC is one of 728 community water systems in California in the 501 to 3,300 people size category, serving 914 people from groundwater.

As of August 1, 2026, its federal record holds 5 entries between 2005 and 2024, of which 1 health-based item remains open.

Of the 5, 2 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 the Lead and Copper Rule, the Public Notice Rule and Revised PN Rule, and inorganic chemicals.

Violation history

LSL Inventory
Health-based
LEAD AND COPPER RULE REVISIONS
October 17, 2024
Unaddressed
Public Notification Violation for NPDWR Violation
—
Public Notice
April 1, 2024 – October 7, 2024
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
July 1, 2023 – June 30, 2024
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 2006 – November 30, 2006
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2005 – December 31, 2005
Resolved

Unaddressed no corrective action on record yetResolved 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
October 17, 2024	LSL Inventory	LEAD AND COPPER RULE REVISIONS	Health-based	Unaddressed
April 1, 2024 – October 7, 2024	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
July 1, 2023 – June 30, 2024	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Archived
November 1, 2006 – November 30, 2006	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

April 10, 2023State Administrative/Compliance Order without penalty issued5 linked violations
January 13, 2022State Administrative/Compliance Order without penalty issued4 linked violations
September 14, 2018State Compliance achieved1 linked violation
March 28, 2018State Administrative/Compliance Order without penalty issued5 linked violations
December 7, 2012State Administrative/Compliance Order without penalty issued4 linked violations
September 14, 2012State Administrative/Compliance Order without penalty issued1 linked violation
November 24, 2004State Compliance achieved5 linked violations
September 17, 1997State Public Notification received11 linked violations
December 18, 1996State Public Notification received14 linked violations
November 30, 1996State Compliance achieved5 linked violations
October 8, 1996State Public Notification received18 linked violations
September 30, 1996State Compliance achieved3 linked violations

Common questions

Is RANCHO SAN JOAQUIN MWC required to publish a Consumer Confidence Report?: Yes. RANCHO SAN JOAQUIN MWC 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 RANCHO SAN JOAQUIN MWC’s next Consumer Confidence Report due?: RANCHO SAN JOAQUIN MWC’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does RANCHO SAN JOAQUIN MWC have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show 1 open health-based violation for RANCHO SAN JOAQUIN MWC.
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

ROCHA, SUSAN

408-804-1401

HOLLISTER, CA 95024