CA0600008 · California

COLUSA CO. WWD #1 - GRIMES

Federal fiscal 2026Q3 · EPA violation and follow-up records

Violation records shown: 31
EPA health-based flag: 26
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 5

Counties listed by EPA · Colusa County, California

Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.

Violations and what followed

Among 4 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 30 days. The interval uses the reporting periods and dates on file.

Monitoring or reporting · Unaddressed by formal action
Follow-up Or Routine LCR Tap M/RViolation 1221072 · Lead and Copper Rule · Lead and Copper Rule
Noncompliance period start October 1, 2025 · first reported March 20, 2026
No linked action row appears in the records shown.
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221071 · Arsenic · Arsenic Rule
Noncompliance period start October 1, 2024 · period end December 31, 2024 · first reported February 24, 2025 · EPA return-to-compliance field December 31, 2024

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221070 · Arsenic · Arsenic Rule
Noncompliance period start July 1, 2024 · period end September 30, 2024 · first reported February 24, 2025 · EPA return-to-compliance field September 30, 2024

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221069 · Arsenic · Arsenic Rule
Noncompliance period start April 1, 2024 · period end June 30, 2024 · first reported February 24, 2025 · EPA return-to-compliance field June 30, 2024

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221068 · Arsenic · Arsenic Rule
Noncompliance period start January 1, 2024 · period end March 31, 2024 · first reported May 15, 2024 · EPA return-to-compliance field March 31, 2024

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221067 · Arsenic · Arsenic Rule
Noncompliance period start October 1, 2023 · period end December 31, 2023 · first reported May 15, 2024 · EPA return-to-compliance field December 31, 2023

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Follow-up Or Routine LCR Tap M/RViolation 1221066 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start October 1, 2023 · period end September 26, 2024 · first reported February 15, 2024 · EPA return-to-compliance field September 26, 2024

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9621024	December 21, 2023	Formal	State Administrative/Compliance Order without penalty issued
9621026	September 26, 2024	Resolving	State Compliance achieved

EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221065 · Arsenic · Arsenic Rule
Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported October 2, 2023 · EPA return-to-compliance field September 30, 2023

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221064 · Arsenic · Arsenic Rule
Noncompliance period start April 1, 2023 · period end June 30, 2023 · first reported October 2, 2023 · EPA return-to-compliance field June 30, 2023

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221063 · Arsenic · Arsenic Rule
Noncompliance period start January 1, 2023 · period end March 31, 2023 · first reported May 16, 2023 · EPA return-to-compliance field March 31, 2023

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 1221061 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start November 1, 2022 · period end November 30, 2022 · first reported February 16, 2023 · EPA return-to-compliance field November 30, 2022

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9621021	December 13, 2022	Formal	State Administrative/Compliance Order without penalty issued
9621022	January 20, 2023	Resolving	State Compliance achieved

EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221062 · Arsenic · Arsenic Rule
Noncompliance period start October 1, 2022 · period end December 31, 2022 · first reported February 16, 2023 · EPA return-to-compliance field December 31, 2022

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221060 · Arsenic · Arsenic Rule
Noncompliance period start July 1, 2022 · period end September 30, 2022 · first reported November 17, 2022 · EPA return-to-compliance field September 30, 2022

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221059 · Arsenic · Arsenic Rule
Noncompliance period start April 1, 2022 · period end June 30, 2022 · first reported November 17, 2022 · EPA return-to-compliance field June 30, 2022

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221058 · Arsenic · Arsenic Rule
Noncompliance period start January 1, 2022 · period end March 31, 2022 · first reported November 17, 2022 · EPA return-to-compliance field March 31, 2022

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221057 · Arsenic · Arsenic Rule
Noncompliance period start October 1, 2021 · period end December 31, 2021 · first reported November 17, 2022 · EPA return-to-compliance field December 31, 2021

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 1221054 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start October 1, 2021 · period end October 31, 2021 · first reported February 16, 2022 · EPA return-to-compliance field October 31, 2021

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9621018	December 1, 2021	Informal	State Formal Notice of Violation issued
9621020	June 8, 2022	Resolving	State Compliance achieved

EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221056 · Arsenic · Arsenic Rule
Noncompliance period start July 1, 2021 · period end September 30, 2021 · first reported November 17, 2022 · EPA return-to-compliance field September 30, 2021

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221053 · Arsenic · Arsenic Rule
Noncompliance period start April 1, 2021 · period end June 30, 2021 · first reported June 30, 2021 · EPA return-to-compliance field June 30, 2021

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221052 · Arsenic · Arsenic Rule
Noncompliance period start January 1, 2021 · period end March 31, 2021 · first reported June 30, 2021 · EPA return-to-compliance field March 31, 2021

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 1221041 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start December 1, 2020 · period end December 31, 2020 · first reported February 16, 2021 · EPA return-to-compliance field December 31, 2020

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9621016	January 13, 2021	Informal	State Formal Notice of Violation issued
9621017	January 13, 2021	Resolving	State Compliance achieved

EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221051 · Arsenic · Arsenic Rule
Noncompliance period start October 1, 2020 · period end December 31, 2020 · first reported June 30, 2021 · EPA return-to-compliance field December 31, 2020

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221050 · Arsenic · Arsenic Rule
Noncompliance period start July 1, 2020 · period end September 30, 2020 · first reported June 30, 2021 · EPA return-to-compliance field September 30, 2020

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221049 · Arsenic · Arsenic Rule
Noncompliance period start April 1, 2020 · period end June 30, 2020 · first reported June 30, 2021 · EPA return-to-compliance field June 30, 2020

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221048 · Arsenic · Arsenic Rule
Noncompliance period start January 1, 2020 · period end March 31, 2020 · first reported June 30, 2021 · EPA return-to-compliance field March 31, 2020

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221047 · Arsenic · Arsenic Rule
Noncompliance period start October 1, 2019 · period end December 31, 2019 · first reported June 30, 2021 · EPA return-to-compliance field December 31, 2019

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221046 · Arsenic · Arsenic Rule
Noncompliance period start July 1, 2019 · period end September 30, 2019 · first reported June 30, 2021 · EPA return-to-compliance field September 30, 2019

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221045 · Arsenic · Arsenic Rule
Noncompliance period start April 1, 2019 · period end June 30, 2019 · first reported June 30, 2021 · EPA return-to-compliance field June 30, 2019

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221044 · Arsenic · Arsenic Rule
Noncompliance period start January 1, 2019 · period end March 31, 2019 · first reported June 30, 2021 · EPA return-to-compliance field March 31, 2019

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221043 · Arsenic · Arsenic Rule
Noncompliance period start October 1, 2018 · period end December 31, 2018 · first reported June 30, 2021 · EPA return-to-compliance field December 31, 2018

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1221042 · Arsenic · Arsenic Rule
Noncompliance period start July 1, 2018 · period end September 30, 2018 · first reported June 30, 2021 · EPA return-to-compliance field September 30, 2018

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
921006 January 5, 2009 Formal State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
921006	January 5, 2009	Formal	State Administrative/Compliance Order without penalty issued

EPA data and scope

How to read the records

The enforcement snapshot is federal fiscal 2026Q3. The EPA archive labels its violation file October 13, 2026. EPA says federal reporting can lag by several months. For current advisories, check your utility or local drinking-water authority.

We matched active community water systems by public water system ID between EPA’s system search and SDWIS inventory. We show violations with a recorded noncompliance, initial reporting or return-to-compliance date from 2021 onward, plus earlier records listed as Addressed or Unaddressed.
EPA’s health-based flag identifies violations of contaminant or disinfectant limits or treatment requirements. Monitoring and reporting violations describe required tests or reports. Neither category measures household exposure.
Addressed means EPA records formal enforcement on a violation that remains unresolved in the snapshot. Unaddressed means no formal action is recorded for an unresolved violation. Resolved can mean compliance was restored, the rule ceased to apply, or further action was unnecessary. Archived is a separate status.
We count a violation once per water system and group its distinct linked actions. Conflicting records are set aside. Places are EPA-listed search locations and can include mailing locations. Use the provider name and system ID to identify your service.

EPA data dictionary and files · EPA reporting and enforcement FAQ · Find an annual water quality report · How to get the report from your utility