090605107 · California
Yocha Dehe Potable Water System
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 17
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 17
Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.
Violations and what followed
Among 17 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.
Monitoring or reporting · Resolved
Monitoring, RegularViolation 060510703401072023 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad RuleNoncompliance period start July 1, 2023 · period end September 30, 2023 · first reported December 5, 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 0605107OX11172311656 November 17, 2023 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 060510703400672023 · Combined Uranium · Radionuclides and Revised Rad RuleNoncompliance period start July 1, 2023 · period end September 30, 2023 · first reported December 5, 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 0605107OX11172311656 November 17, 2023 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 060510703400072023 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad RuleNoncompliance period start July 1, 2023 · period end September 30, 2023 · first reported December 5, 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 0605107OX11172311657 November 17, 2023 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 060510703295912023 · Chlordane · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2025 · first reported March 18, 2026 · EPA return-to-compliance field December 31, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605107OX02032612452 February 3, 2026 Resolving Federal Compliance achieved 0605107IA04012612506 April 1, 2026 Informal Federal Violation/Reminder Notice Monitoring or reporting · Resolved
Monitoring, RegularViolation 060510703294612023 · ETHYLENE DIBROMIDE · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2025 · first reported March 18, 2026 · EPA return-to-compliance field December 31, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605107OX02032612452 February 3, 2026 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 060510703293112023 · 1,2-DIBROMO-3-CHLOROPROPANE · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2025 · first reported March 18, 2026 · EPA return-to-compliance field December 31, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605107OX02032612452 February 3, 2026 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 060510703238312023 · Total Polychlorinated Biphenyls (PCB) · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2025 · first reported March 18, 2026 · EPA return-to-compliance field December 31, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605107OX02032612453 February 3, 2026 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 060510703227412023 · HEXACHLOROBENZENE · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2025 · first reported March 18, 2026 · EPA return-to-compliance field December 31, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605107OX02032612453 February 3, 2026 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 060510703206712023 · Heptachlor epoxide · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2025 · first reported March 18, 2026 · EPA return-to-compliance field December 31, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605107OX02032612453 February 3, 2026 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 060510703206512023 · Heptachlor · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2025 · first reported March 18, 2026 · EPA return-to-compliance field December 31, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605107OX02032612453 February 3, 2026 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 060510703204212023 · Hexachlorocyclopentadiene · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2025 · first reported March 18, 2026 · EPA return-to-compliance field December 31, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605107OX02032612453 February 3, 2026 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 060510703202012023 · Toxaphene · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2025 · first reported March 18, 2026 · EPA return-to-compliance field December 31, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605107OX02032612453 February 3, 2026 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 060510703201512023 · Methoxychlor · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2025 · first reported March 18, 2026 · EPA return-to-compliance field December 31, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605107OX02032612453 February 3, 2026 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 060510703201012023 · BHC-GAMMA · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2025 · first reported March 18, 2026 · EPA return-to-compliance field December 31, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605107OX02032612453 February 3, 2026 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 060510703200512023 · Endrin · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2025 · first reported March 18, 2026 · EPA return-to-compliance field December 31, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605107OX02032612453 February 3, 2026 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (IDSE)Violation 060510730295012015 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2015 · period end December 31, 2015 · first reported June 30, 2023 · EPA return-to-compliance field December 31, 2015
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605107OX09191685833 September 19, 2016 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (IDSE)Violation 060510730245612015 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2015 · period end December 31, 2015 · first reported June 30, 2023 · EPA return-to-compliance field December 31, 2015
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605107OX09191685834 September 19, 2016 Resolving Federal 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.
- 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