CA1500465 · California
OAK KNOLLS MUTUAL WATER COMPANY
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 7
- EPA health-based flag
- 6
- Health-based records unresolved in this snapshot
- 1
- Monitoring and reporting records
- 1
Counties listed by EPA · Kern 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
EPA health-based flag · Unaddressed by formal action
LSL InventoryViolation 9812012 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start October 17, 2024 · first reported April 1, 2025
No linked action row appears in the records shown.EPA health-based flag · Resolved
Maximum Contaminant Level Violation, Single SampleViolation 9812014 · Nitrate · Nitrate RuleNoncompliance period start January 1, 2025 · period end March 1, 2018 · first reported June 3, 2025 · EPA return-to-compliance field March 1, 2018
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9819009 March 1, 2018 Resolving State Compliance achieved Monitoring or reporting · Unaddressed by formal action
LSL ReportingViolation 9812013 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start October 17, 2024 · first reported April 1, 2025
No linked action row appears in the records shown.EPA health-based flag · Resolved
Maximum Contaminant Level Violation, Single SampleViolation 9812011 · Nitrate · Nitrate RuleNoncompliance period start October 1, 2024 · period end March 1, 2018 · first reported February 24, 2025 · EPA return-to-compliance field March 1, 2018
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9819008 August 29, 2013 Informal State Violation/Reminder Notice 9819009 March 1, 2018 Resolving State Compliance achieved EPA health-based flag · Resolved
Maximum Contaminant Level Violation, Single SampleViolation 9812010 · Nitrate · Nitrate RuleNoncompliance period start July 1, 2024 · period end March 1, 2018 · first reported November 15, 2024 · EPA return-to-compliance field March 1, 2018
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9819008 August 29, 2013 Informal State Violation/Reminder Notice 9819009 March 1, 2018 Resolving State Compliance achieved EPA health-based flag · Archived
Maximum Contaminant Level Violation, Single SampleViolation 9812009 · Nitrate · Nitrate RuleNoncompliance period start April 1, 2024 · period end June 30, 2024 · first reported August 15, 2024 · 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 9819012 May 17, 2024 Formal State Administrative/Compliance Order without penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, Single SampleViolation 9812008 · Nitrate · Nitrate RuleNoncompliance period start January 1, 2024 · period end March 31, 2024 · first reported August 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 9819012 May 17, 2024 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