Is DEL ORO RIVER ISLAND SERV TERR #1 required to publish a Consumer Confidence Report?

Yes. DEL ORO RIVER ISLAND SERV TERR #1 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 ORO RIVER ISLAND SERV TERR #1’s next Consumer Confidence Report due?

DEL ORO RIVER ISLAND SERV TERR #1’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.

CHICO, CA · Tulare County

DEL ORO RIVER ISLAND SERV TERR #1 Water System

Consumer Confidence Report status

DEL ORO RIVER ISLAND SERV TERR #1 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 ORO RIVER ISLAND SERV TERR #1.

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): CA5400665
System type: Community Water System
Population served: 1,280
Service connections: 388
Ownership: privately owned
Water source: surface water (rivers, lakes, or reservoirs)

DEL ORO RIVER ISLAND SERV TERR #1 is one of 728 community water systems in California in the 501 to 3,300 people size category, serving 1,280 people from surface water.

As of August 1, 2026, its federal record holds 20 entries between 1980 and 2012, all of which EPA lists as closed. Nothing has been added since 2012.

Of the 20, 3 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 Radionuclides and Revised Rad Rule, inorganic chemicals, and the Miscellaneous Other Rules.

Violation history

Maximum Contaminant Level Violation, Average
Health-based
Combined Uranium
January 1, 2012 – March 31, 2012
Archived
Maximum Contaminant Level Violation, Average
Health-based
Combined Uranium
July 1, 2009 – September 30, 2009
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
January 1, 2008 – March 31, 2008
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Combined Uranium
January 1, 2008 – March 31, 2008
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Combined Uranium
October 1, 2007 – December 31, 2007
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
October 1, 2007 – December 31, 2007
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
July 1, 2007 – September 30, 2007
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Combined Uranium
April 1, 2007 – June 30, 2007
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 2007 – March 31, 2007
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Combined Uranium
July 1, 2006 – September 30, 2006
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
July 1, 2006 – September 30, 2006
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Combined Uranium
April 1, 2006 – June 30, 2006
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Combined Uranium
October 1, 2005 – December 31, 2005
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
April 1, 2005 – April 30, 2005
Resolved
Notification, Public
—
No contaminant on record
July 1, 1983 – July 31, 1983
Archived
Notification, Public
—
No contaminant on record
June 1, 1983 – June 30, 1983
Archived
Notification, Public
—
No contaminant on record
March 1, 1983 – March 31, 1983
Archived
Notification, Public
—
No contaminant on record
January 1, 1983 – January 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

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

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2012 – March 31, 2012	Maximum Contaminant Level Violation, Average	Combined Uranium	Health-based	Archived
July 1, 2009 – September 30, 2009	Maximum Contaminant Level Violation, Average	Combined Uranium	Health-based	Archived
January 1, 2008 – March 31, 2008	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
January 1, 2008 – March 31, 2008	Maximum Contaminant Level Violation, Single Sample	Combined Uranium	Health-based	Archived
October 1, 2007 – December 31, 2007	Maximum Contaminant Level Violation, Single Sample	Combined Uranium	Health-based	Archived
October 1, 2007 – December 31, 2007	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
July 1, 2007 – September 30, 2007	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
April 1, 2007 – June 30, 2007	Maximum Contaminant Level Violation, Single Sample	Combined Uranium	Health-based	Archived
March 1, 2007 – March 31, 2007	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2006 – September 30, 2006	Maximum Contaminant Level Violation, Single Sample	Combined Uranium	Health-based	Archived
July 1, 2006 – September 30, 2006	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
April 1, 2006 – June 30, 2006	Maximum Contaminant Level Violation, Single Sample	Combined Uranium	Health-based	Archived
October 1, 2005 – December 31, 2005	Maximum Contaminant Level Violation, Single Sample	Combined Uranium	Health-based	Archived
April 1, 2005 – April 30, 2005	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 1983 – July 31, 1983	Notification, Public	—	—	Archived
June 1, 1983 – June 30, 1983	Notification, Public	—	—	Archived
March 1, 1983 – March 31, 1983	Notification, Public	—	—	Archived
January 1, 1983 – January 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

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

Enforcement actions

August 21, 2023State Administrative/Compliance Order without penalty issued7 linked violations
April 10, 2019State Compliance achieved22 linked violations
November 16, 2017State Administrative/Compliance Order without penalty issued42 linked violations
November 18, 2011State Administrative/Compliance Order without penalty issued24 linked violations
December 10, 2009State Administrative/Compliance Order without penalty issued2 linked violations
October 16, 2008State Administrative/Compliance Order without penalty issued18 linked violations
May 17, 2007State Violation/Reminder Notice1 linked violation
April 28, 2006State Violation/Reminder Notice1 linked violation
April 18, 2006State Violation/Reminder Notice1 linked violation
September 21, 2005State Violation/Reminder Notice3 linked violations
March 15, 2005State Administrative/Compliance Order without penalty issued1 linked violation
April 10, 2004State Formal Notice of Violation issued1 linked violation
April 10, 2004State Formal Notice of Violation issued1 linked violation
February 10, 2004State Formal Notice of Violation issued2 linked violations
January 14, 2004State Administrative/Compliance Order without penalty issued1 linked violation
September 10, 2003State Administrative/Compliance Order without penalty issued2 linked violations
July 10, 2003State Formal Notice of Violation issued2 linked violations

Common questions

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

FORTINO, ROBERT

530-894-1100

CHICO, CA 95927