Is DEL DIOS MUTUAL WATER COMPANY required to publish a Consumer Confidence Report?

Yes. DEL DIOS MUTUAL WATER COMPANY 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 DEL DIOS MUTUAL WATER COMPANY’s next Consumer Confidence Report due?

DEL DIOS MUTUAL WATER COMPANY’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.

ESCONDIDO, CA · San Diego County

DEL DIOS MUTUAL WATER COMPANY Water System

Consumer Confidence Report status

DEL DIOS MUTUAL WATER COMPANY 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 DEL DIOS MUTUAL WATER COMPANY.

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): CA3700866
System type: Community Water System
Population served: 330
Service connections: 148
Ownership: privately owned
Water source: surface water (rivers, lakes, or reservoirs)

DEL DIOS MUTUAL WATER COMPANY is one of 3,951 community water systems in California in the 500 or fewer people size category, serving 330 people from surface water.

As of August 1, 2026, its federal record holds 15 entries between 1980 and 2024, all of which EPA lists as closed.

Of the 15, 4 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 Miscellaneous Other Rules, the Total Coliform Rules, and the Radionuclides and Revised Rad Rule.

Violation history

Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2024 – June 7, 2025
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2022 – September 30, 2022
Archived
Monitoring, Regular
—
Nitrate
July 1, 2018 – September 30, 2018
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2007 – October 31, 2007
Resolved
Notification, Public
—
No contaminant on record
September 1, 1984 – September 30, 1984
Archived
Notification, Public
—
No contaminant on record
August 1, 1984 – August 31, 1984
Archived
Notification, Public
—
No contaminant on record
July 1, 1984 – July 31, 1984
Archived
Notification, Public
—
No contaminant on record
June 1, 1984 – June 30, 1984
Archived
Notification, Public
—
No contaminant on record
May 1, 1984 – May 31, 1984
Archived
Notification, Public
—
No contaminant on record
April 1, 1984 – April 30, 1984
Archived
Notification, Public
—
No contaminant on record
February 1, 1984 – February 29, 1984
Archived
Notification, Public
—
No contaminant on record
January 1, 1984 – January 31, 1984
Archived
Notification, Public
—
No contaminant on record
July 1, 1983 – July 31, 1983
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
July 1, 2024 – June 7, 2025	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2022 – September 30, 2022	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Archived
July 1, 2018 – September 30, 2018	Monitoring, Regular	Nitrate	—	Resolved
October 1, 2007 – October 31, 2007	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 1984 – September 30, 1984	Notification, Public	—	—	Archived
August 1, 1984 – August 31, 1984	Notification, Public	—	—	Archived
July 1, 1984 – July 31, 1984	Notification, Public	—	—	Archived
June 1, 1984 – June 30, 1984	Notification, Public	—	—	Archived
May 1, 1984 – May 31, 1984	Notification, Public	—	—	Archived
April 1, 1984 – April 30, 1984	Notification, Public	—	—	Archived
February 1, 1984 – February 29, 1984	Notification, Public	—	—	Archived
January 1, 1984 – January 31, 1984	Notification, Public	—	—	Archived
July 1, 1983 – July 31, 1983	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

November 14, 2025State Administrative/Compliance Order with penalty issued3 linked violations
June 7, 2025State Compliance achieved2 linked violations
October 4, 2024State Administrative/Compliance Order without penalty issued2 linked violations
September 28, 2023State Compliance achieved1 linked violation
August 16, 2023State Formal Notice of Violation issued1 linked violation
September 25, 2019State Compliance achieved1 linked violation
May 8, 2019State Administrative Penalty assessed1 linked violation
August 27, 2018State Compliance achieved1 linked violation
May 30, 2013State Compliance achieved1 linked violation
May 16, 2013State Administrative/Compliance Order without penalty issued1 linked violation
January 27, 2010State Compliance achievedgeneral compliance action — not tied to a specific violation on record
October 30, 2008State Compliance achieved1 linked violation
October 13, 2008State Administrative/Compliance Order without penalty issued1 linked violation
July 30, 2008State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 9, 2008State Administrative/Compliance Order without penalty issuedgeneral compliance action — not tied to a specific violation on record
November 30, 2007State Compliance achieved1 linked violation

Common questions

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

FOSTER, RICH

760-580-5805

ESCONDIDO, CA 92029