Is TWIN VALLEY INC required to publish a Consumer Confidence Report?

Yes. TWIN VALLEY INC 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 TWIN VALLEY INC’s next Consumer Confidence Report due?

TWIN VALLEY INC’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.

CASTROVILLE, CA · Santa Clara County

TWIN VALLEY INC Water System

Consumer Confidence Report status

TWIN VALLEY INC 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 TWIN VALLEY INC.

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): CA4300575
System type: Community Water System
Population served: 317
Service connections: 96
Ownership: privately owned
Water source: groundwater (wells)

TWIN VALLEY INC is one of 3,951 community water systems in California in the 500 or fewer people size category, serving 317 people from groundwater.

As of August 1, 2026, its federal record holds 83 entries between 1981 and 2023, all of which EPA lists as closed. Nothing has been added since 2023.

Of the 83, 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 inorganic chemicals, the Miscellaneous Other Rules, and the Total Coliform Rules.

Violation history

Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
November 1, 2023 – November 30, 2023
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
July 1, 2023 – July 31, 2023
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
June 1, 2023 – June 30, 2023
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
November 1, 2022 – November 30, 2022
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
October 1, 2022 – October 31, 2022
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
September 1, 2022 – September 30, 2022
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
August 1, 2022 – August 31, 2022
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
July 1, 2022 – July 31, 2022
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
May 1, 2022 – May 31, 2022
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
December 1, 2021 – December 31, 2021
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
November 1, 2021 – November 30, 2021
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
October 1, 2021 – October 31, 2021
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
September 1, 2021 – September 30, 2021
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
August 1, 2021 – August 31, 2021
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
July 1, 2021 – July 31, 2021
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
June 1, 2021 – June 30, 2021
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
May 1, 2021 – May 31, 2021
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
April 1, 2021 – April 30, 2021
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
March 1, 2021 – March 31, 2021
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
February 1, 2021 – February 28, 2021
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
January 1, 2021 – January 31, 2021
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
December 1, 2020 – December 31, 2020
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
November 1, 2020 – November 30, 2020
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
August 1, 2020 – August 31, 2020
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
June 1, 2020 – June 30, 2020
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
May 1, 2020 – May 31, 2020
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
April 1, 2020 – April 30, 2020
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
March 1, 2020 – March 31, 2020
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
February 1, 2020 – February 29, 2020
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
January 1, 2020 – January 31, 2020
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
December 1, 2019 – December 31, 2019
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
November 1, 2019 – November 30, 2019
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
October 1, 2019 – October 31, 2019
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
September 1, 2019 – September 30, 2019
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
July 1, 2019 – July 31, 2019
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
June 1, 2019 – June 30, 2019
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
May 1, 2019 – May 31, 2019
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
December 1, 2018 – December 31, 2018
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
November 1, 2018 – November 30, 2018
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
October 1, 2018 – October 31, 2018
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
September 1, 2018 – September 30, 2018
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
August 1, 2018 – August 31, 2018
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
July 1, 2018 – July 31, 2018
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
June 1, 2018 – June 30, 2018
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
May 1, 2018 – May 31, 2018
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
April 1, 2018 – April 30, 2018
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
March 1, 2018 – March 31, 2018
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
February 1, 2018 – February 28, 2018
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
January 1, 2018 – January 31, 2018
Archived
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
August 1, 2017 – August 31, 2017
Archived
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
February 1, 2017 – February 28, 2017
Archived
Variance/Exemption/Other Compliance
—
No contaminant on record
July 15, 2016 – October 14, 2016
Resolved
Variance/Exemption/Other Compliance
—
No contaminant on record
June 30, 2016 – September 29, 2016
Resolved
Variance/Exemption/Other Compliance
—
No contaminant on record
February 5, 2016 – May 4, 2016
Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
March 1, 2015 – March 31, 2015
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
November 1, 2012 – August 2, 2013
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2009 – December 31, 2011
Resolved
Monitoring, Regular
—
Asbestos
January 1, 1993 – December 31, 2001
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
April 1, 1983 – April 30, 1983
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
April 1, 1983 – April 30, 1983
Archived
Notification, Public
—
No contaminant on record
March 1, 1983 – March 31, 1983
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
March 1, 1983 – March 31, 1983
Archived
Notification, Public
—
No contaminant on record
January 1, 1983 – January 31, 1983
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
January 1, 1983 – January 31, 1983
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
December 1, 1982 – December 31, 1982
Archived
Notification, Public
—
No contaminant on record
December 1, 1982 – December 31, 1982
Archived
Notification, Public
—
No contaminant on record
November 1, 1982 – November 30, 1982
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
November 1, 1982 – November 30, 1982
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
October 6, 1982 – August 5, 1983
Archived
Notification, Public
—
No contaminant on record
October 1, 1982 – October 31, 1982
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
October 1, 1982 – October 31, 1982
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
September 8, 1982 – October 7, 1982
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
August 3, 1982 – September 2, 1982
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
May 5, 1982 – June 4, 1982
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
April 6, 1982 – May 5, 1982
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
March 4, 1982 – May 3, 1982
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
February 3, 1982 – April 2, 1982
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
December 3, 1981 – February 2, 1982
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
November 4, 1981 – March 3, 1982
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
October 1, 1981 – September 30, 1982
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
November 1, 2023 – November 30, 2023	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
July 1, 2023 – July 31, 2023	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
June 1, 2023 – June 30, 2023	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
November 1, 2022 – November 30, 2022	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
October 1, 2022 – October 31, 2022	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
September 1, 2022 – September 30, 2022	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
August 1, 2022 – August 31, 2022	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
July 1, 2022 – July 31, 2022	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
May 1, 2022 – May 31, 2022	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
December 1, 2021 – December 31, 2021	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
November 1, 2021 – November 30, 2021	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
October 1, 2021 – October 31, 2021	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
September 1, 2021 – September 30, 2021	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
August 1, 2021 – August 31, 2021	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
July 1, 2021 – July 31, 2021	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
June 1, 2021 – June 30, 2021	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
May 1, 2021 – May 31, 2021	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
April 1, 2021 – April 30, 2021	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
March 1, 2021 – March 31, 2021	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
February 1, 2021 – February 28, 2021	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
January 1, 2021 – January 31, 2021	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
December 1, 2020 – December 31, 2020	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
November 1, 2020 – November 30, 2020	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
August 1, 2020 – August 31, 2020	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
June 1, 2020 – June 30, 2020	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
May 1, 2020 – May 31, 2020	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
April 1, 2020 – April 30, 2020	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
March 1, 2020 – March 31, 2020	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
February 1, 2020 – February 29, 2020	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
January 1, 2020 – January 31, 2020	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
December 1, 2019 – December 31, 2019	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
November 1, 2019 – November 30, 2019	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
October 1, 2019 – October 31, 2019	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
September 1, 2019 – September 30, 2019	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
July 1, 2019 – July 31, 2019	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
June 1, 2019 – June 30, 2019	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
May 1, 2019 – May 31, 2019	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
December 1, 2018 – December 31, 2018	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
November 1, 2018 – November 30, 2018	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
October 1, 2018 – October 31, 2018	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
September 1, 2018 – September 30, 2018	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
August 1, 2018 – August 31, 2018	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
July 1, 2018 – July 31, 2018	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
June 1, 2018 – June 30, 2018	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
May 1, 2018 – May 31, 2018	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
April 1, 2018 – April 30, 2018	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
March 1, 2018 – March 31, 2018	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
February 1, 2018 – February 28, 2018	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
January 1, 2018 – January 31, 2018	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
August 1, 2017 – August 31, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Archived
February 1, 2017 – February 28, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Archived
July 15, 2016 – October 14, 2016	Variance/Exemption/Other Compliance	—	—	Resolved
June 30, 2016 – September 29, 2016	Variance/Exemption/Other Compliance	—	—	Resolved
February 5, 2016 – May 4, 2016	Variance/Exemption/Other Compliance	—	—	Resolved
March 1, 2015 – March 31, 2015	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
November 1, 2012 – August 2, 2013	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
January 1, 2009 – December 31, 2011	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 1993 – December 31, 2001	Monitoring, Regular	Asbestos	—	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
April 1, 1983 – April 30, 1983	Notification, Public	—	—	Archived
April 1, 1983 – April 30, 1983	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
March 1, 1983 – March 31, 1983	Notification, Public	—	—	Archived
March 1, 1983 – March 31, 1983	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
January 1, 1983 – January 31, 1983	Notification, Public	—	—	Archived
January 1, 1983 – January 31, 1983	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
December 1, 1982 – December 31, 1982	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
December 1, 1982 – December 31, 1982	Notification, Public	—	—	Archived
November 1, 1982 – November 30, 1982	Notification, Public	—	—	Archived
November 1, 1982 – November 30, 1982	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
October 6, 1982 – August 5, 1983	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
October 1, 1982 – October 31, 1982	Notification, Public	—	—	Archived
October 1, 1982 – October 31, 1982	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
September 8, 1982 – October 7, 1982	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
August 3, 1982 – September 2, 1982	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
May 5, 1982 – June 4, 1982	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
April 6, 1982 – May 5, 1982	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
March 4, 1982 – May 3, 1982	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
February 3, 1982 – April 2, 1982	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
December 3, 1981 – February 2, 1982	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
November 4, 1981 – March 3, 1982	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
October 1, 1981 – September 30, 1982	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

February 1, 2019State Compliance achieved7 linked violations
December 19, 2017State Administrative/Compliance Order without penalty issued55 linked violations
April 3, 2017State Administrative/Compliance Order without penalty issued2 linked violations
October 10, 2016State Administrative/Compliance Order without penalty issued5 linked violations
June 15, 2016State Administrative/Compliance Order with penalty issued6 linked violations
April 30, 2015State Compliance achieved2 linked violations
April 30, 2015State Administrative/Compliance Order without penalty issued7 linked violations
February 11, 2013State Administrative/Compliance Order without penalty issued14 linked violations
December 30, 2012State Compliance achieved2 linked violations
April 30, 1997State Compliance achieved9 linked violations
January 3, 1994State Other7 linked violations

Common questions

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

FARMER, MILES

831-920-6796

CASTROVILLE, CA 95012