CA4900508 · California

CAZADERO WATER COMPANY, INC. (PUC)

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

Violation records shown: 26
EPA health-based flag: 8
Health-based records unresolved in this snapshot: 8
Monitoring and reporting records: 16

Counties listed by EPA · Sonoma 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 2 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 91 days. The interval uses the reporting periods and dates on file.

EPA health-based flag · Addressed by formal action

Failure to Filter (SWTR)Violation 818022 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start August 6, 2020 · first reported November 13, 2020

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818018	August 6, 2020	Formal	State Administrative/Compliance Order without penalty issued
818030	January 7, 2025	Formal	State Administrative/Compliance Order without penalty issued

EPA health-based flag · Addressed by formal action
OCCT/SOWT Treatment Installation/DemonstrationViolation 818070 · Lead and Copper Rule · Lead and Copper Rule
Noncompliance period start February 14, 2020 · first reported April 1, 2025

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
818030 January 7, 2025 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Addressed by formal action
OCCT/SOWT Study/RecommendationViolation 818069 · Lead and Copper Rule · Lead and Copper Rule
Noncompliance period start August 14, 2019 · first reported April 1, 2025

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
818029 September 6, 2019 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Addressed by formal action
Failure to Filter (SWTR)Violation 818021 · Surface Water Treatment Rule · Surface Water Treatment Rule
Noncompliance period start July 31, 2019 · first reported February 14, 2020

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
818017 July 7, 2017 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Addressed by formal action
OCCT/SOWT Study/RecommendationViolation 818018 · Lead and Copper Rule · Lead and Copper Rule
Noncompliance period start February 14, 2019 · first reported October 1, 2019

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
818016 August 14, 2018 Formal State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818030	January 7, 2025	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818029	September 6, 2019	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818017	July 7, 2017	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818016	August 14, 2018	Formal	State Administrative/Compliance Order without penalty issued

EPA health-based flag · Addressed by formal action

OCCT/SOWT Treatment Installation/DemonstrationViolation 818007 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start April 27, 2018 · first reported May 8, 2019

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818005	August 14, 2018	Formal	State Administrative/Compliance Order without penalty issued
818016	August 14, 2018	Formal	State Administrative/Compliance Order without penalty issued
818030	January 7, 2025	Formal	State Administrative/Compliance Order without penalty issued

EPA health-based flag · Addressed by formal action
Failure to Filter (SWTR)Violation 818009 · Surface Water Treatment Rule · Surface Water Treatment Rule
Noncompliance period start November 22, 2010 · first reported May 8, 2019

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
818010 July 7, 2017 Formal State Administrative/Compliance Order without penalty issued
EPA health-based flag · Unaddressed by formal action
MPL Non-ComplianceViolation 818006 · COPPER, FREE · Lead and Copper Rule
Noncompliance period start September 27, 2006 · first reported November 15, 2018
No linked action row appears in the records shown.

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818010	July 7, 2017	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 818028 · Revised Total Coliform Rule · Revised Total Coliform Rule

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

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818024	March 2, 2022	Informal	State Formal Notice of Violation issued
818026	February 20, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 818027 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start July 1, 2021 · period end September 30, 2021 · first reported March 31, 2022 · EPA return-to-compliance field September 30, 2021

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818024	March 2, 2022	Informal	State Formal Notice of Violation issued
818026	February 20, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Archived
Monitoring, RegularViolation 818044 · Selenium · Inorganic Chemicals
Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported March 31, 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
818025 March 23, 2022 Formal State Administrative/Compliance Order without penalty issued
Monitoring or reporting · Archived
Monitoring, RegularViolation 818043 · Thallium, Total · Inorganic Chemicals
Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported March 31, 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
818025 March 23, 2022 Formal State Administrative/Compliance Order without penalty issued
Monitoring or reporting · Archived
Monitoring, RegularViolation 818042 · Beryllium, Total · Inorganic Chemicals
Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported March 31, 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
818025 March 23, 2022 Formal State Administrative/Compliance Order without penalty issued
Monitoring or reporting · Archived
Monitoring, RegularViolation 818041 · Antimony, Total · Inorganic Chemicals
Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported March 31, 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
818025 March 23, 2022 Formal State Administrative/Compliance Order without penalty issued
Monitoring or reporting · Archived
Monitoring, RegularViolation 818040 · Nitrite · Nitrate Rule
Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported March 31, 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
818025 March 23, 2022 Formal State Administrative/Compliance Order without penalty issued
Monitoring or reporting · Archived
Monitoring, RegularViolation 818039 · Nickel · Inorganic Chemicals
Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported March 31, 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
818025 March 23, 2022 Formal State Administrative/Compliance Order without penalty issued
Monitoring or reporting · Archived
Monitoring, RegularViolation 818038 · Mercury · Inorganic Chemicals
Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported March 31, 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
818025 March 23, 2022 Formal State Administrative/Compliance Order without penalty issued
Monitoring or reporting · Archived
Monitoring, RegularViolation 818037 · Fluoride · Inorganic Chemicals
Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported March 31, 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
818025 March 23, 2022 Formal State Administrative/Compliance Order without penalty issued
Monitoring or reporting · Archived
Monitoring, RegularViolation 818036 · Chromium · Inorganic Chemicals
Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported March 31, 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
818025 March 23, 2022 Formal State Administrative/Compliance Order without penalty issued
Monitoring or reporting · Archived
Monitoring, RegularViolation 818035 · Cadmium · Inorganic Chemicals
Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported March 31, 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
818025 March 23, 2022 Formal State Administrative/Compliance Order without penalty issued
Monitoring or reporting · Archived
Monitoring, RegularViolation 818034 · Barium · Inorganic Chemicals
Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported March 31, 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
818025 March 23, 2022 Formal State Administrative/Compliance Order without penalty issued
Monitoring or reporting · Archived
Monitoring, RegularViolation 818033 · Arsenic · Arsenic Rule
Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported March 31, 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
818025 March 23, 2022 Formal State Administrative/Compliance Order without penalty issued
Monitoring or reporting · Archived
Monitoring and Reporting (DBP)Violation 818066 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts Rule
Noncompliance period start October 1, 2020 · period end September 30, 2023 · first reported August 15, 2024 · 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
818028 August 6, 2024 Formal State Administrative/Compliance Order without penalty issued
Monitoring or reporting · Archived
Monitoring and Reporting (DBP)Violation 818065 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts Rule
Noncompliance period start October 1, 2020 · period end September 30, 2023 · first reported August 15, 2024 · 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
818028 August 6, 2024 Formal State Administrative/Compliance Order without penalty issued
Other or unclassified · Archived
Variance/Exemption/Other ComplianceViolation 818016 · Miscellaneous Other Rules
Noncompliance period start April 1, 2019 · period end June 30, 2019 · first reported August 17, 2022 · EPA return-to-compliance field June 30, 2019
No linked action row appears in the records shown.
Other or unclassified · Archived
Variance/Exemption/Other ComplianceViolation 818019 · Miscellaneous Other Rules
Noncompliance period start June 1, 2017 · period end September 30, 2017 · first reported August 17, 2022 · EPA return-to-compliance field September 30, 2017

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
818014 February 5, 2018 Formal State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818025	March 23, 2022	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818025	March 23, 2022	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818025	March 23, 2022	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818025	March 23, 2022	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818025	March 23, 2022	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818025	March 23, 2022	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818025	March 23, 2022	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818025	March 23, 2022	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818025	March 23, 2022	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818025	March 23, 2022	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818025	March 23, 2022	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818025	March 23, 2022	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818028	August 6, 2024	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818028	August 6, 2024	Formal	State Administrative/Compliance Order without penalty issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
818014	February 5, 2018	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