090605146 · California
La Posta Upper
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 16
- EPA health-based flag
- 5
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 11
Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.
Violations and what followed
Among 15 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 90 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Resolved
Monitoring, RegularViolation 060514603401012026 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad RuleNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported June 3, 2026 · EPA return-to-compliance field March 31, 2026
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605146OX06012612547 June 1, 2026 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 060514603400012026 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad RuleNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported June 3, 2026 · EPA return-to-compliance field March 31, 2026
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605146OX06012612547 June 1, 2026 Resolving Federal Compliance achieved EPA health-based flag · Archived
Maximum Contaminant Level Violation, Single SampleViolation 060514601104012026 · Nitrate · Nitrate RuleNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported June 3, 2026 · EPA return-to-compliance field March 31, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605146IA06252612562 June 25, 2026 Informal Federal Violation/Reminder Notice 0605146IA06252612570 June 25, 2026 Informal Federal Violation/Reminder Notice Monitoring or reporting · Resolved
Monitoring, RegularViolation 060514603401072025 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad RuleNoncompliance period start July 1, 2025 · period end September 30, 2025 · first reported December 31, 2025 · EPA return-to-compliance field September 30, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605146IA12022512325 December 2, 2025 Informal Federal Violation/Reminder Notice 0605146OX02032612527 February 3, 2026 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 060514603400672025 · Combined Uranium · Radionuclides and Revised Rad RuleNoncompliance period start July 1, 2025 · period end September 30, 2025 · first reported December 31, 2025 · EPA return-to-compliance field September 30, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605146OX02032612527 February 3, 2026 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 060514603400072025 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad RuleNoncompliance period start July 1, 2025 · period end September 30, 2025 · first reported December 31, 2025 · EPA return-to-compliance field September 30, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605146OX02032612527 February 3, 2026 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 06051463A800082024 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start August 1, 2024 · period end August 31, 2024 · first reported December 18, 2024 · EPA return-to-compliance field August 31, 2024
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605146OX09102411914 September 10, 2024 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 060514627099972024 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2024 · period end September 10, 2024 · first reported December 18, 2024 · EPA return-to-compliance field September 10, 2024
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605146OX09102411914 September 10, 2024 Resolving Federal Compliance achieved EPA health-based flag · Resolved
Maximum Contaminant Level Violation, Single SampleViolation 060514601104012023 · Nitrate · Nitrate RuleNoncompliance period start January 1, 2023 · period end March 31, 2023 · first reported June 30, 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 0605146OX03312311497 March 31, 2023 Resolving Federal Compliance achieved EPA health-based flag · Resolved
Maximum Contaminant Level Violation, Single SampleViolation 060514601104072021 · Nitrate · Nitrate RuleNoncompliance period start July 1, 2021 · period end September 30, 2021 · first reported June 30, 2023 · 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 0605146OX11032111263 November 3, 2021 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 060514603104042021 · Nitrate · Nitrate RuleNoncompliance period start April 1, 2021 · period end June 30, 2021 · first reported June 30, 2023 · 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 0605146OX08192110814 August 19, 2021 Resolving Federal Compliance achieved EPA health-based flag · Resolved
Maximum Contaminant Level Violation, Single SampleViolation 060514601104012021 · Nitrate · Nitrate RuleNoncompliance period start January 1, 2021 · period end March 31, 2021 · first reported June 30, 2023 · 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 0605146OX11032111263 November 3, 2021 Resolving Federal Compliance achieved EPA health-based flag · Resolved
Maximum Contaminant Level Violation, Single SampleViolation 060514601104042020 · Nitrate · Nitrate RuleNoncompliance period start April 1, 2020 · period end June 30, 2020 · first reported June 30, 2023 · 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 0605146OX09012010814 September 1, 2020 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Follow-up Or Routine LCR Tap M/RViolation 060514652500072016 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start July 1, 2016 · period end February 23, 2017 · first reported June 30, 2023 · EPA return-to-compliance field February 23, 2017
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605146OX02231786818 February 23, 2017 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine Major (TCR)Violation 060514623310012009 · Coliform (TCR) · Total Coliform RuleNoncompliance period start January 1, 2009 · period end March 31, 2009 · first reported June 30, 2023 · EPA return-to-compliance field March 31, 2009
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605146OX01211045816 January 21, 2010 Resolving Federal Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 060514603400012004 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad RuleNoncompliance period start January 1, 2004 · period end December 31, 2004 · first reported March 28, 2024 · EPA return-to-compliance field December 31, 2004
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0605146OX03250938677 March 25, 2009 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