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CA4100540 · California

OKU INCORPORATED

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

Violation records shown
41
EPA health-based flag
0
Health-based records unresolved in this snapshot
0
Monitoring and reporting records
40

Counties listed by EPA · San Mateo County, California

Open the EPA system record

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

Violations and what followed

Among 37 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 1,095 days. The interval uses the reporting periods and dates on file.

  1. Monitoring or reporting · Addressed by formal action

    Follow-up Or Routine LCR Tap M/RViolation 9600071 · Lead and Copper Rule · Lead and Copper Rule

    Noncompliance period start October 1, 2025 · first reported June 22, 2026

    1 linked action
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217192December 23, 2025FormalState Administrative/Compliance Order without penalty issued

  2. Monitoring or reporting · Unaddressed by formal action

    Follow-up Or Routine LCR Tap M/RViolation 9600067 · 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.

  3. Monitoring or reporting · Archived

    Monitoring, Routine (RTCR)Violation 9600070 · Revised Total Coliform Rule · Revised Total Coliform Rule

    Noncompliance period start September 1, 2025 · period end November 30, 2025 · first reported June 22, 2026 · EPA return-to-compliance field November 30, 2025

    1 linked action
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217192December 23, 2025FormalState Administrative/Compliance Order without penalty issued

  4. Other or unclassified · Addressed by formal action

    Consumer Confidence Report Complete Failure to ReportViolation 9600068 · Consumer Confidence Rule · Consumer Confidence Rule

    Noncompliance period start July 1, 2025 · first reported June 22, 2026

    1 linked action
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217191October 8, 2025FormalState Administrative/Compliance Order without penalty issued

  5. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600066 · Radium-228 · Radionuclides and Revised Rad Rule

    Noncompliance period start July 1, 2021 · period end September 30, 2021 · first reported August 17, 2022 · EPA return-to-compliance field September 30, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  6. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600065 · Radium-228 · Radionuclides and Revised Rad Rule

    Noncompliance period start April 1, 2021 · period end June 30, 2021 · first reported August 17, 2022 · EPA return-to-compliance field June 30, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  7. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600064 · Radium-228 · Radionuclides and Revised Rad Rule

    Noncompliance period start January 1, 2021 · period end March 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field March 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  8. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600062 · Styrene · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  9. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600061 · Ethylbenzene · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  10. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600060 · Toluene · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  11. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600059 · Benzene · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  12. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600058 · CHLOROBENZENE · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  13. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600056 · Tetrachloroethylene · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  14. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600055 · 1,1,2-Trichloroethane · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  15. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600054 · Trichloroethylene · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  16. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600053 · 1,2-Dichloropropane · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  17. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600052 · Carbon tetrachloride · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  18. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600051 · 1,1,1-Trichloroethane · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  19. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600050 · 1,2-Dichloroethane · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  20. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600049 · trans-1,2-Dichloroethylene · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  21. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600047 · 1,1-Dichloroethylene · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  22. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600046 · Vinyl chloride · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  23. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600045 · p-Dichlorobenzene · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  24. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600044 · o-Dichlorobenzene · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  25. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600043 · DICHLOROMETHANE · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  26. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600042 · Xylenes, Total · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  27. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600039 · cis-1,2-Dichloroethylene · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  28. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600038 · 1,2,4-Trichlorobenzene · Volatile Organic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  29. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600035 · CYANIDE · Inorganic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  30. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600016 · Selenium · Inorganic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  31. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600015 · Thallium, Total · Inorganic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  32. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600014 · Beryllium, Total · Inorganic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  33. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600013 · Antimony, Total · Inorganic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  34. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600012 · Nitrite · Nitrate Rule

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    1 linked action
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217190January 24, 2023ResolvingState Compliance achieved

  35. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600011 · Nickel · Inorganic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  36. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600010 · Mercury · Inorganic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  37. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600009 · Fluoride · Inorganic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  38. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600008 · Chromium · Inorganic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  39. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600007 · Cadmium · Inorganic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  40. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600006 · Barium · Inorganic Chemicals

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

  41. Monitoring or reporting · Resolved

    Monitoring, RegularViolation 9600005 · Arsenic · Arsenic Rule

    Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported August 17, 2022 · EPA return-to-compliance field December 31, 2021

    2 linked actions
    Enforcement and resolution records linked by EPA
    Action IDDateCategoryEPA action type
    1217189May 26, 2022FormalState Administrative/Compliance Order without penalty issued
    1217190January 24, 2023ResolvingState Compliance achieved

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.

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