NN0403000 · Arizona
Fort Defiance-Window Rock-St Michaels NTUA
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 15
- EPA health-based flag
- 9
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 0
Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.
Violations and what followed
Among 13 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 91 days. The interval uses the reporting periods and dates on file.
Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 040300075750022025 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start February 1, 2025 · first reported December 31, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0403000FJ12052543012 December 5, 2025 Informal State Formal Notice of Violation issued EPA health-based flag · Resolved
Treatment Technique, Level 1 Assessment (RTCR)Violation 04030002A800022025 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start February 1, 2025 · period end July 11, 2025 · first reported June 30, 2025 · EPA return-to-compliance field July 11, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0403000FJ06262542593 June 26, 2025 Informal State Formal Notice of Violation issued 0403000FJ06262542594 June 26, 2025 Informal State Formal Notice of Violation issued 0403000OX07112543252 July 11, 2025 Resolving State Compliance achieved Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 0403000757500102024 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start October 1, 2024 · first reported June 23, 2026
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0403000FJ06262542595 June 26, 2025 Informal State Formal Notice of Violation issued EPA health-based flag · Resolved
Maximum Contaminant Level Violation, AverageViolation 0403000022950102024 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start October 1, 2024 · period end December 31, 2024 · first reported June 23, 2026 · EPA return-to-compliance field December 31, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0403000OX02272542611 February 27, 2025 Resolving State Compliance achieved 0403000FJ04252542356 April 25, 2025 Informal State Formal Notice of Violation issued 0403000FJ04252542357 April 25, 2025 Informal State Formal Notice of Violation issued Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 040300075750012017 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start January 1, 2017 · period end May 19, 2017 · first reported June 30, 2025 · EPA return-to-compliance field May 19, 2017
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0403000OX05191733360 May 19, 2017 Resolving State Compliance achieved EPA health-based flag · Resolved
Maximum Contaminant Level Violation, AverageViolation 040300002295012017 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2017 · period end March 31, 2017 · first reported June 30, 2025 · EPA return-to-compliance field March 31, 2017
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0403000OX05301733796 May 30, 2017 Resolving State Compliance achieved 0403000FG06231733260 June 23, 2017 Informal State Public Notification issued 0403000FJ06231733259 June 23, 2017 Informal State Formal Notice of Violation issued EPA health-based flag · Resolved
Maximum Contaminant Level Violation, AverageViolation 0403000022950102016 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start October 1, 2016 · period end December 31, 2016 · first reported June 30, 2025 · EPA return-to-compliance field December 31, 2016
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0403000OX02061733214 February 6, 2017 Resolving State Compliance achieved 0403000FG03071733048 March 7, 2017 Informal State Public Notification issued 0403000FJ03071733047 March 7, 2017 Informal State Formal Notice of Violation issued EPA health-based flag · Resolved
Maximum Contaminant Level Violation, AverageViolation 040300002295072016 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2016 · period end September 30, 2016 · first reported June 30, 2025 · EPA return-to-compliance field September 30, 2016
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0403000FJ12081632806 December 8, 2016 Informal State Formal Notice of Violation issued 0403000OX02061733213 February 6, 2017 Resolving State Compliance achieved Other or unclassified · Resolved
Sample Siting Plan Errors (RTCR)Violation 04030005A800042016 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start April 1, 2016 · period end September 30, 2025 · first reported October 6, 2024 · 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 0403000FJ08282441406 August 28, 2024 Informal State Formal Notice of Violation issued 0403000OX09302542928 September 30, 2025 Resolving State Compliance achieved EPA health-based flag · Resolved
Maximum Contaminant Level Violation, AverageViolation 040300002295042016 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start April 1, 2016 · period end June 30, 2016 · first reported June 30, 2025 · EPA return-to-compliance field June 30, 2016
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0403000FJ08311632602 August 31, 2016 Informal State Formal Notice of Violation issued 0403000OX02061733212 February 6, 2017 Resolving State Compliance achieved EPA health-based flag · Resolved
Maximum Contaminant Level Violation, AverageViolation 040300002295012016 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2016 · period end March 31, 2016 · first reported June 30, 2025 · EPA return-to-compliance field March 31, 2016
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0403000FG05311632231 May 31, 2016 Informal State Public Notification issued 0403000FJ05311632227 May 31, 2016 Informal State Formal Notice of Violation issued 0403000OX11181632728 November 18, 2016 Resolving State Compliance achieved Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 0403000757500102015 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start October 1, 2015 · period end July 1, 2016 · first reported June 30, 2025 · EPA return-to-compliance field July 1, 2016
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0403000FJ05311632230 May 31, 2016 Informal State Formal Notice of Violation issued 0403000OX07011632667 July 1, 2016 Resolving State Compliance achieved EPA health-based flag · Resolved
Maximum Contaminant Level Violation, AverageViolation 0403000022950102015 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start October 1, 2015 · period end December 31, 2015 · first reported June 30, 2025 · EPA return-to-compliance field December 31, 2015
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0403000FJ03081631917 March 8, 2016 Informal State Formal Notice of Violation issued 0403000OX02061733211 February 6, 2017 Resolving State Compliance achieved Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 040300075750072015 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start July 1, 2015 · period end July 1, 2016 · first reported June 30, 2025 · EPA return-to-compliance field July 1, 2016
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0403000FJ03081631918 March 8, 2016 Informal State Formal Notice of Violation issued 0403000OX07011632666 July 1, 2016 Resolving State Compliance achieved EPA health-based flag · Resolved
Maximum Contaminant Level Violation, AverageViolation 040300002295072015 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2015 · period end September 30, 2015 · first reported June 30, 2025 · EPA return-to-compliance field September 30, 2015
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 0403000OX11171531693 November 17, 2015 Resolving State Compliance achieved 0403000FG12021531412 December 2, 2015 Informal State Public Notification issued 0403000FJ12021531411 December 2, 2015 Informal State Formal Notice of Violation 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