CA3701793 · California
TWIN LAKES RESORT
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 51
- EPA health-based flag
- 26
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 24
Counties listed by EPA · San Diego 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
Monitoring or reporting · Archived
Monitoring, Check/Repeat/ConfirmationViolation 1705423 · Combined Uranium · Radionuclides and Revised Rad RuleNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported September 22, 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 1606159 April 7, 2026 Informal State Formal Notice of Violation issued Monitoring or reporting · Archived
Monitoring, Check/Repeat/ConfirmationViolation 1705422 · Combined Uranium · Radionuclides and Revised Rad RuleNoncompliance period start October 1, 2025 · period end December 31, 2025 · first reported September 22, 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 1606159 April 7, 2026 Informal State Formal Notice of Violation issued Monitoring or reporting · Archived
Monitoring, Check/Repeat/ConfirmationViolation 1705421 · Combined Uranium · Radionuclides and Revised Rad RuleNoncompliance period start July 1, 2025 · period end September 30, 2025 · first reported September 22, 2026 · 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 1606159 April 7, 2026 Informal State Formal Notice of Violation issued Monitoring or reporting · Archived
Monitoring, Check/Repeat/ConfirmationViolation 1705420 · Combined Uranium · Radionuclides and Revised Rad RuleNoncompliance period start April 1, 2025 · period end June 30, 2025 · first reported September 22, 2026 · EPA return-to-compliance field June 30, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606159 April 7, 2026 Informal State Formal Notice of Violation issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705384 · Arsenic · Arsenic RuleNoncompliance period start April 1, 2025 · period end June 30, 2025 · first reported September 19, 2025 · EPA return-to-compliance field June 30, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606157 August 4, 2025 Formal State Administrative/Compliance Order with penalty issued Monitoring or reporting · Archived
Monitoring, Check/Repeat/ConfirmationViolation 1705419 · Combined Uranium · Radionuclides and Revised Rad RuleNoncompliance period start January 1, 2025 · period end March 31, 2025 · first reported September 22, 2026 · EPA return-to-compliance field March 31, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606159 April 7, 2026 Informal State Formal Notice of Violation issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705385 · Arsenic · Arsenic RuleNoncompliance period start January 1, 2025 · period end March 31, 2025 · first reported September 19, 2025 · EPA return-to-compliance field March 31, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606157 August 4, 2025 Formal State Administrative/Compliance Order with penalty issued Monitoring or reporting · Archived
Monitoring, Check/Repeat/ConfirmationViolation 1705418 · Combined Uranium · Radionuclides and Revised Rad RuleNoncompliance period start October 1, 2024 · period end December 31, 2024 · first reported September 22, 2026 · EPA return-to-compliance field December 31, 2024
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606159 April 7, 2026 Informal State Formal Notice of Violation issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705386 · Arsenic · Arsenic RuleNoncompliance period start October 1, 2024 · period end December 31, 2024 · first reported September 19, 2025 · EPA return-to-compliance field December 31, 2024
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606157 August 4, 2025 Formal State Administrative/Compliance Order with penalty issued Monitoring or reporting · Archived
Monitoring, Check/Repeat/ConfirmationViolation 1705417 · Combined Uranium · Radionuclides and Revised Rad RuleNoncompliance period start July 1, 2024 · period end September 30, 2024 · first reported September 22, 2026 · EPA return-to-compliance field September 30, 2024
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606159 April 7, 2026 Informal State Formal Notice of Violation issued Monitoring or reporting · Archived
Monitoring, Check/Repeat/ConfirmationViolation 1705393 · Arsenic · Arsenic RuleNoncompliance period start July 1, 2024 · period end September 30, 2024 · first reported September 19, 2025 · EPA return-to-compliance field September 30, 2024
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606157 August 4, 2025 Formal State Administrative/Compliance Order with penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705387 · Arsenic · Arsenic RuleNoncompliance period start July 1, 2024 · period end September 30, 2024 · first reported September 19, 2025 · EPA return-to-compliance field September 30, 2024
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606157 August 4, 2025 Formal State Administrative/Compliance Order with penalty issued Monitoring or reporting · Archived
Monitoring, Check/Repeat/ConfirmationViolation 1705416 · Combined Uranium · Radionuclides and Revised Rad RuleNoncompliance period start April 1, 2024 · period end June 30, 2024 · first reported September 22, 2026 · 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 1606159 April 7, 2026 Informal State Formal Notice of Violation issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705388 · Arsenic · Arsenic RuleNoncompliance period start April 1, 2024 · period end June 30, 2024 · first reported September 19, 2025 · 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 1606157 August 4, 2025 Formal State Administrative/Compliance Order with penalty issued Monitoring or reporting · Archived
Monitoring, Check/Repeat/ConfirmationViolation 1705415 · Combined Uranium · Radionuclides and Revised Rad RuleNoncompliance period start January 1, 2024 · period end March 31, 2024 · first reported September 22, 2026 · 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 1606159 April 7, 2026 Informal State Formal Notice of Violation issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705389 · Arsenic · Arsenic RuleNoncompliance period start January 1, 2024 · period end March 31, 2024 · first reported September 19, 2025 · 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 1606157 August 4, 2025 Formal State Administrative/Compliance Order with penalty issued Monitoring or reporting · Archived
Monitoring, Check/Repeat/ConfirmationViolation 1705414 · Combined Uranium · Radionuclides and Revised Rad RuleNoncompliance period start October 1, 2023 · period end December 31, 2023 · first reported September 22, 2026 · EPA return-to-compliance field December 31, 2023
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606159 April 7, 2026 Informal State Formal Notice of Violation issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705381 · Arsenic · Arsenic RuleNoncompliance period start October 1, 2023 · period end December 31, 2023 · first reported February 15, 2024 · EPA return-to-compliance field December 31, 2023
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606148 December 13, 2016 Formal State Administrative/Compliance Order without penalty issued Monitoring or reporting · Archived
Monitoring, Check/Repeat/ConfirmationViolation 1705413 · Combined Uranium · Radionuclides and Revised Rad RuleNoncompliance period start July 1, 2023 · period end September 30, 2023 · first reported September 22, 2026 · 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 1606159 April 7, 2026 Informal State Formal Notice of Violation issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705380 · Arsenic · Arsenic RuleNoncompliance period start July 1, 2023 · period end September 30, 2023 · first reported February 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 1606148 December 13, 2016 Formal State Administrative/Compliance Order without penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705426 · Arsenic · Arsenic RuleNoncompliance period start April 1, 2023 · period end June 30, 2023 · first reported September 22, 2026 · EPA return-to-compliance field June 30, 2023
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606157 August 4, 2025 Formal State Administrative/Compliance Order with penalty issued Monitoring or reporting · Archived
Monitoring, Check/Repeat/ConfirmationViolation 1705412 · Combined Uranium · Radionuclides and Revised Rad RuleNoncompliance period start April 1, 2023 · period end June 30, 2023 · first reported September 22, 2026 · EPA return-to-compliance field June 30, 2023
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606159 April 7, 2026 Informal State Formal Notice of Violation issued Monitoring or reporting · Archived
Monitoring, Check/Repeat/ConfirmationViolation 1705392 · Arsenic · Arsenic RuleNoncompliance period start April 1, 2023 · period end June 30, 2023 · first reported September 19, 2025 · EPA return-to-compliance field June 30, 2023
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606157 August 4, 2025 Formal State Administrative/Compliance Order with penalty issued Monitoring or reporting · Archived
Monitoring, Check/Repeat/ConfirmationViolation 1705411 · Combined Uranium · Radionuclides and Revised Rad RuleNoncompliance period start January 1, 2023 · period end March 31, 2023 · first reported September 22, 2026 · 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 1606159 April 7, 2026 Informal State Formal Notice of Violation issued Monitoring or reporting · Archived
Monitoring, RegularViolation 1705382 · Nitrate · Nitrate RuleNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported May 15, 2024 · EPA return-to-compliance field December 31, 2023
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606155 March 4, 2024 Formal State Administrative/Compliance Order with penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705379 · Arsenic · Arsenic RuleNoncompliance period start January 1, 2023 · period end March 31, 2023 · first reported February 15, 2024 · 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 1606148 December 13, 2016 Formal State Administrative/Compliance Order without penalty issued Monitoring or reporting · Archived
Monitoring, Check/Repeat/ConfirmationViolation 1705397 · Combined Uranium · Radionuclides and Revised Rad RuleNoncompliance period start October 1, 2022 · period end December 31, 2022 · first reported September 22, 2026 · EPA return-to-compliance field December 31, 2022
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606159 April 7, 2026 Informal State Formal Notice of Violation issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705378 · Arsenic · Arsenic RuleNoncompliance period start October 1, 2022 · period end December 31, 2022 · first reported February 15, 2024 · EPA return-to-compliance field December 31, 2022
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606148 December 13, 2016 Formal State Administrative/Compliance Order without penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705377 · Arsenic · Arsenic RuleNoncompliance period start July 1, 2022 · period end September 30, 2022 · first reported February 15, 2024 · EPA return-to-compliance field September 30, 2022
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606148 December 13, 2016 Formal State Administrative/Compliance Order without penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705376 · Arsenic · Arsenic RuleNoncompliance period start April 1, 2022 · period end June 30, 2022 · first reported February 15, 2024 · EPA return-to-compliance field June 30, 2022
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606148 December 13, 2016 Formal State Administrative/Compliance Order without penalty issued Monitoring or reporting · Archived
Monitoring, RegularViolation 1705429 · Nitrate · Nitrate RuleNoncompliance period start January 1, 2022 · period end December 31, 2022 · first reported September 22, 2026 · EPA return-to-compliance field December 31, 2022
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606155 March 4, 2024 Formal State Administrative/Compliance Order with penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705375 · Arsenic · Arsenic RuleNoncompliance period start January 1, 2022 · period end March 31, 2022 · first reported February 15, 2024 · EPA return-to-compliance field March 31, 2022
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606148 December 13, 2016 Formal State Administrative/Compliance Order without penalty issued Monitoring or reporting · Addressed by formal action
Follow-up Or Routine LCR Tap M/RViolation 1705383 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start October 1, 2021 · first reported August 15, 2024
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606156 August 5, 2024 Formal State Administrative/Compliance Order with penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705374 · Arsenic · Arsenic RuleNoncompliance period start July 1, 2021 · period end September 30, 2021 · first reported February 15, 2024 · 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 1606148 December 13, 2016 Formal State Administrative/Compliance Order without penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705373 · Arsenic · Arsenic RuleNoncompliance period start April 1, 2021 · period end June 30, 2021 · first reported February 15, 2024 · 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 1606148 December 13, 2016 Formal State Administrative/Compliance Order without penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705372 · Arsenic · Arsenic RuleNoncompliance period start January 1, 2021 · period end March 31, 2021 · first reported June 30, 2021 · 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 1606148 December 13, 2016 Formal State Administrative/Compliance Order without penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705425 · Arsenic · Arsenic RuleNoncompliance period start October 1, 2020 · period end December 31, 2020 · first reported September 22, 2026 · EPA return-to-compliance field December 31, 2020
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606157 August 4, 2025 Formal State Administrative/Compliance Order with penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705371 · Arsenic · Arsenic RuleNoncompliance period start July 1, 2020 · period end September 30, 2020 · first reported June 30, 2021 · EPA return-to-compliance field September 30, 2020
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606148 December 13, 2016 Formal State Administrative/Compliance Order without penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705370 · Arsenic · Arsenic RuleNoncompliance period start April 1, 2020 · period end June 30, 2020 · first reported June 30, 2021 · 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 1606148 December 13, 2016 Formal State Administrative/Compliance Order without penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705369 · Arsenic · Arsenic RuleNoncompliance period start January 1, 2020 · period end March 31, 2020 · first reported June 30, 2021 · EPA return-to-compliance field March 31, 2020
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606148 December 13, 2016 Formal State Administrative/Compliance Order without penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705424 · Arsenic · Arsenic RuleNoncompliance period start October 1, 2019 · period end December 31, 2019 · first reported September 22, 2026 · EPA return-to-compliance field December 31, 2019
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606157 August 4, 2025 Formal State Administrative/Compliance Order with penalty issued Monitoring or reporting · Archived
Monitoring, Check/Repeat/ConfirmationViolation 1705391 · Arsenic · Arsenic RuleNoncompliance period start October 1, 2019 · period end December 31, 2019 · first reported September 19, 2025 · EPA return-to-compliance field December 31, 2019
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606157 August 4, 2025 Formal State Administrative/Compliance Order with penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705368 · Arsenic · Arsenic RuleNoncompliance period start July 1, 2019 · period end September 30, 2019 · first reported June 30, 2021 · EPA return-to-compliance field September 30, 2019
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606148 December 13, 2016 Formal State Administrative/Compliance Order without penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705367 · Arsenic · Arsenic RuleNoncompliance period start April 1, 2019 · period end June 30, 2019 · first reported June 30, 2021 · EPA return-to-compliance field June 30, 2019
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606148 December 13, 2016 Formal State Administrative/Compliance Order without penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705366 · Arsenic · Arsenic RuleNoncompliance period start January 1, 2019 · period end March 31, 2019 · first reported June 30, 2021 · EPA return-to-compliance field March 31, 2019
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606148 December 13, 2016 Formal State Administrative/Compliance Order without penalty issued EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 1705365 · Arsenic · Arsenic RuleNoncompliance period start October 1, 2018 · period end December 31, 2018 · first reported June 30, 2021 · EPA return-to-compliance field December 31, 2018
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606148 December 13, 2016 Formal State Administrative/Compliance Order without penalty issued Monitoring or reporting · Archived
Monitoring, Check/Repeat/ConfirmationViolation 1705390 · Arsenic · Arsenic RuleNoncompliance period start April 1, 2017 · period end June 30, 2017 · first reported September 19, 2025 · EPA return-to-compliance field June 30, 2017
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606157 August 4, 2025 Formal State Administrative/Compliance Order with penalty issued Other or unclassified · Addressed by formal action
Public Notification Violation for NPDWR ViolationViolation 1705394 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start December 23, 2016 · first reported September 19, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1606157 August 4, 2025 Formal State Administrative/Compliance Order with penalty issued Monitoring or reporting · Addressed by formal action
Initial Tap Sampling for Pb and CuViolation 902938 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start April 14, 2009 · first reported August 19, 2014
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 903606 April 24, 2009 Formal State Administrative/Compliance Order without penalty issued Monitoring or reporting · Addressed by formal action
Initial Tap Sampling for Pb and CuViolation 702362 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start June 25, 2007 · first reported August 19, 2014
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 702745 July 5, 2007 Formal State Administrative/Compliance Order without penalty issued Monitoring or reporting · Unaddressed by formal action
Initial Tap Sampling for Pb and CuViolation 95V0001 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start July 1, 1993 · first reported December 12, 1995
No linked action row appears in the records shown.
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