Is LA TIERRA HEIGHTS MUTUAL required to publish a Consumer Confidence Report?

Yes. LA TIERRA HEIGHTS MUTUAL 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 LA TIERRA HEIGHTS MUTUAL’s next Consumer Confidence Report due?

LA TIERRA HEIGHTS MUTUAL’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.

ANGWIN, CA · Napa County

LA TIERRA HEIGHTS MUTUAL Water System

Consumer Confidence Report status

LA TIERRA HEIGHTS MUTUAL 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 LA TIERRA HEIGHTS MUTUAL.

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): CA2800525
System type: Community Water System
Population served: 67
Service connections: 19
Ownership: privately owned
Water source: groundwater (wells)

LA TIERRA HEIGHTS MUTUAL is one of 3,951 community water systems in California in the 500 or fewer people size category, serving 67 people from groundwater.

As of August 1, 2026, its federal record holds 8 entries between 1980 and 2022, all of which EPA lists as closed. Nothing has been added since 2022.

Of the 8, 7 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 Total Coliform Rules, the Radionuclides and Revised Rad Rule, and the Lead and Copper Rule.

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
October 1, 2022 – December 31, 2022
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2019 – September 7, 2020
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2019 – December 31, 2019
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 2014 – August 31, 2014
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 2006 – February 28, 2006
Resolved
Notification, Public
—
No contaminant on record
September 1, 1984 – September 30, 1984
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
October 1, 1981 – September 30, 1982
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
October 30, 1980 – October 29, 1981
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
October 1, 2022 – December 31, 2022	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2019 – September 7, 2020	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2019 – December 31, 2019	Monitoring, Regular	Nitrate	—	Resolved
August 1, 2014 – August 31, 2014	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
February 1, 2006 – February 28, 2006	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
September 1, 1984 – September 30, 1984	Notification, Public	—	—	Archived
October 1, 1981 – September 30, 1982	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived
October 30, 1980 – October 29, 1981	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived

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

Enforcement actions

February 20, 2020State Administrative/Compliance Order without penalty issued2 linked violations
March 28, 2006State Compliance achieved3 linked violations

Common questions

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

COX, KEN

707-965-2874

ANGWIN, CA 94508