CO0126715 · Colorado
SOMERSET DOMESTIC WD
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 17
- EPA health-based flag
- 4
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 11
Counties listed by EPA · Gunnison County, Colorado
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 30 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 350 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 524 April 20, 2026 Informal State Violation/Reminder Notice 525 April 20, 2026 Informal State Public Notification requested 526 April 20, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 349 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 524 April 20, 2026 Informal State Violation/Reminder Notice 525 April 20, 2026 Informal State Public Notification requested 526 April 20, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Turbidity (Enhanced SWTR)Violation 348 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment RuleNoncompliance period start October 1, 2024 · period end October 7, 2024 · first reported August 18, 2025 · EPA return-to-compliance field October 7, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 515 October 7, 2024 Resolving State Compliance achieved 522 May 21, 2025 Informal State Violation/Reminder Notice 523 May 21, 2025 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, Turbidity (Enhanced SWTR)Violation 347 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment RuleNoncompliance period start September 1, 2024 · period end September 30, 2024 · first reported August 18, 2025 · EPA return-to-compliance field September 30, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 515 October 7, 2024 Resolving State Compliance achieved 522 May 21, 2025 Informal State Violation/Reminder Notice 523 May 21, 2025 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, Turbidity (Enhanced SWTR)Violation 346 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment RuleNoncompliance period start August 1, 2024 · period end August 31, 2024 · first reported August 18, 2025 · EPA return-to-compliance field August 31, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 515 October 7, 2024 Resolving State Compliance achieved 522 May 21, 2025 Informal State Violation/Reminder Notice 523 May 21, 2025 Informal State Public Notification requested Other or unclassified · Resolved
Public Notification Violation without NPDWR ViolationViolation 344 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start July 28, 2024 · period end August 12, 2024 · first reported August 14, 2024 · EPA return-to-compliance field August 12, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 514 August 9, 2024 Informal State Violation/Reminder Notice 516 August 12, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Turbidity (Enhanced SWTR)Violation 345 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment RuleNoncompliance period start July 1, 2024 · period end July 31, 2024 · first reported August 18, 2025 · EPA return-to-compliance field July 31, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 515 October 7, 2024 Resolving State Compliance achieved 522 May 21, 2025 Informal State Violation/Reminder Notice 523 May 21, 2025 Informal State Public Notification requested Other or unclassified · Resolved
Sample Siting Plan Errors (RTCR)Violation 342 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start June 27, 2024 · period end October 25, 2024 · first reported August 14, 2024 · EPA return-to-compliance field October 25, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 510 June 27, 2024 Informal State Violation/Reminder Notice 511 June 27, 2024 Informal State Public Notification requested 517 October 25, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Turbidity (Enhanced SWTR)Violation 339 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment RuleNoncompliance period start June 1, 2024 · period end June 30, 2024 · first reported August 14, 2024 · EPA return-to-compliance field June 30, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 504 June 27, 2024 Informal State Violation/Reminder Notice 505 June 27, 2024 Informal State Public Notification requested 515 October 7, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Turbidity (Enhanced SWTR)Violation 338 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment RuleNoncompliance period start May 1, 2024 · period end May 31, 2024 · first reported August 14, 2024 · EPA return-to-compliance field May 31, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 502 June 27, 2024 Informal State Violation/Reminder Notice 503 June 27, 2024 Informal State Public Notification requested 515 October 7, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Failure Submit IDSE/Subpart V Plan RptViolation 336 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start November 22, 2023 · period end December 13, 2023 · first reported February 14, 2024 · EPA return-to-compliance field December 13, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 494 November 27, 2023 Informal State Violation/Reminder Notice 495 November 27, 2023 Informal State Public Notification requested 498 December 13, 2023 Resolving State Compliance achieved 500 April 24, 2024 Informal State Public Notification received EPA health-based flag · Resolved
Maximum Contaminant Level Violation, AverageViolation 337 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start October 1, 2023 · period end December 31, 2023 · first reported February 14, 2024 · EPA return-to-compliance field December 31, 2023
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 432 April 17, 2017 Formal State Administrative/Compliance Order without penalty issued 496 December 13, 2023 Informal State Violation/Reminder Notice 497 December 13, 2023 Informal State Public Notification requested 499 January 10, 2024 Informal State Public Notification received 501 February 16, 2024 Resolving State Compliance achieved EPA health-based flag · Resolved
Maximum Contaminant Level Violation, AverageViolation 335 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2023 · period end September 30, 2023 · first reported November 15, 2023 · EPA return-to-compliance field September 30, 2023
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 432 April 17, 2017 Formal State Administrative/Compliance Order without penalty issued 491 August 23, 2023 Informal State Violation/Reminder Notice 492 August 23, 2023 Informal State Public Notification requested 493 September 20, 2023 Informal State Public Notification received 501 February 16, 2024 Resolving State Compliance achieved EPA health-based flag · Resolved
Treatment Technique (SWTR and GWR)Violation 333 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start November 1, 2021 · period end November 30, 2021 · first reported February 23, 2022 · EPA return-to-compliance field November 30, 2021
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 483 December 10, 2021 Informal State Violation/Reminder Notice 484 December 10, 2021 Informal State Public Notification requested 489 January 5, 2022 Resolving State Compliance achieved 488 February 2, 2022 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 334 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start October 1, 2021 · period end December 31, 2021 · first reported February 23, 2022 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 486 February 1, 2022 Informal State Violation/Reminder Notice 487 February 1, 2022 Informal State Public Notification requested 490 February 7, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Lead Consumer NoticeViolation 332 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start April 1, 2021 · period end April 8, 2021 · first reported May 17, 2021 · EPA return-to-compliance field April 8, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 480 April 8, 2021 Informal State Violation/Reminder Notice 481 April 8, 2021 Informal State Public Notification requested 482 April 8, 2021 Resolving State Compliance achieved EPA health-based flag · Resolved
Maximum Contaminant Level Violation, AverageViolation 331 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start October 1, 2020 · period end December 31, 2020 · first reported February 16, 2021 · EPA return-to-compliance field December 31, 2020
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 432 April 17, 2017 Formal State Administrative/Compliance Order without penalty issued 477 December 9, 2020 Informal State Violation/Reminder Notice 478 December 9, 2020 Informal State Public Notification requested 479 December 29, 2020 Informal State Public Notification received 485 February 8, 2021 Resolving State 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