AZ0403026 · Arizona

WILLIAMS CITY OF

Federal fiscal 2026Q3 · EPA violation and follow-up records

Violation records shown: 29
EPA health-based flag: 7
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 17

Counties listed by EPA · Coconino County, Arizona

Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.

Violations and what followed

Among 23 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.

EPA health-based flag · Archived
Treatment Technique (SWTR and GWR)Violation 15197 · Surface Water Treatment Rule · Surface Water Treatment Rule
Noncompliance period start June 1, 2026 · period end June 30, 2026 · first reported August 14, 2026 · EPA return-to-compliance field June 30, 2026
No linked action row appears in the records shown.
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 15196 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start May 15, 2026 · period end June 11, 2026 · first reported August 14, 2026 · EPA return-to-compliance field June 11, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3659 June 11, 2026 Informal State Violation/Reminder Notice
3660 June 11, 2026 Resolving State Compliance achieved
Monitoring or reporting · Archived
Monitoring of Treatment (SWTR-Filter)Violation 15193 · Surface Water Treatment Rule · Surface Water Treatment Rule
Noncompliance period start February 1, 2026 · period end February 28, 2026 · first reported May 14, 2026 · EPA return-to-compliance field February 28, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3649 April 2, 2026 Informal State Violation/Reminder Notice
3650 April 2, 2026 Informal State Public Notification requested

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3659	June 11, 2026	Informal	State Violation/Reminder Notice
3660	June 11, 2026	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3649	April 2, 2026	Informal	State Violation/Reminder Notice
3650	April 2, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 15195 · Arsenic · Arsenic Rule

Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 14, 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
3655	April 14, 2026	Informal	State Violation/Reminder Notice
3656	April 14, 2026	Informal	State Public Notification requested

EPA health-based flag · Archived

Maximum Contaminant Level Violation, AverageViolation 15194 · Arsenic · Arsenic Rule

Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 14, 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
3652	April 14, 2026	Informal	State Violation/Reminder Notice
3653	April 14, 2026	Informal	State Public Notification requested
3658	June 11, 2026	Informal	State Public Notification received

Monitoring or reporting · Unaddressed by formal action
Lead Consumer NoticeViolation 15192 · Lead and Copper Rule · Lead and Copper Rule
Noncompliance period start January 1, 2026 · first reported May 14, 2026

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3647 March 23, 2026 Informal State Violation/Reminder Notice
Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 15191 · Surface Water Treatment Rule · Surface Water Treatment Rule
Noncompliance period start December 1, 2025 · period end December 31, 2025 · first reported February 13, 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
3640 February 4, 2026 Informal State Violation/Reminder Notice
3641 February 4, 2026 Resolving State Compliance achieved
Monitoring or reporting · Resolved
Monitoring, Turbidity (Enhanced SWTR)Violation 15190 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Noncompliance period start December 1, 2025 · period end December 31, 2025 · first reported February 13, 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
3643 February 4, 2026 Informal State Violation/Reminder Notice
3644 February 4, 2026 Resolving State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3647	March 23, 2026	Informal	State Violation/Reminder Notice

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3640	February 4, 2026	Informal	State Violation/Reminder Notice
3641	February 4, 2026	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3643	February 4, 2026	Informal	State Violation/Reminder Notice
3644	February 4, 2026	Resolving	State Compliance achieved

EPA health-based flag · Archived

Maximum Contaminant Level Violation, AverageViolation 15189 · Arsenic · Arsenic Rule

Noncompliance period start October 1, 2025 · period end December 31, 2025 · first reported February 13, 2026 · EPA return-to-compliance field December 31, 2025

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3636	December 9, 2025	Informal	State Violation/Reminder Notice
3637	December 9, 2025	Informal	State Public Notification requested
3639	January 12, 2026	Informal	State Public Notification received
3646	February 26, 2026	Formal	State Administrative/Compliance Order without penalty issued

Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 15188 · Consumer Confidence Rule · Consumer Confidence Rule
Noncompliance period start July 1, 2025 · period end August 8, 2025 · first reported November 17, 2025 · EPA return-to-compliance field August 8, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3634 August 8, 2025 Resolving State Compliance achieved
3633 October 16, 2025 Informal State Violation/Reminder Notice
Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 15187 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule
Noncompliance period start May 1, 2025 · period end May 31, 2025 · first reported August 15, 2025 · EPA return-to-compliance field May 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3629 July 18, 2025 Informal State Violation/Reminder Notice
3632 August 7, 2025 Resolving State Compliance achieved
Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 15134 · Consumer Confidence Rule · Consumer Confidence Rule
Noncompliance period start October 2, 2023 · period end September 30, 2024 · first reported March 29, 2024 · EPA return-to-compliance field September 30, 2024

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3582 October 20, 2023 Informal State Violation/Reminder Notice
3628 September 30, 2024 Resolving State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3634	August 8, 2025	Resolving	State Compliance achieved
3633	October 16, 2025	Informal	State Violation/Reminder Notice

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3629	July 18, 2025	Informal	State Violation/Reminder Notice
3632	August 7, 2025	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3582	October 20, 2023	Informal	State Violation/Reminder Notice
3628	September 30, 2024	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Monthly Turbidity Exceed (Enhanced SWTR)Violation 15133 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment Rule

Noncompliance period start May 1, 2023 · period end May 31, 2023 · first reported August 14, 2023 · EPA return-to-compliance field May 31, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3575	July 6, 2023	Informal	State Violation/Reminder Notice
3576	July 6, 2023	Informal	State Public Notification requested
3579	August 3, 2023	Informal	State Public Notification received
3580	August 9, 2023	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Monthly Turbidity Exceed (Enhanced SWTR)Violation 15132 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment Rule

Noncompliance period start April 1, 2023 · period end April 30, 2023 · first reported August 14, 2023 · EPA return-to-compliance field April 30, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3572	July 6, 2023	Informal	State Violation/Reminder Notice
3573	July 6, 2023	Informal	State Public Notification requested
3578	August 3, 2023	Informal	State Public Notification received
3580	August 9, 2023	Resolving	State Compliance achieved

Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 15128 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start January 31, 2023 · period end May 8, 2023 · first reported May 15, 2023 · EPA return-to-compliance field May 8, 2023

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3559 March 17, 2023 Informal State Violation/Reminder Notice
3561 May 8, 2023 Resolving State Compliance achieved
Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 15130 · CARBON, TOTAL · Stage 1 Disinfectants and Disinfection Byproducts Rule
Noncompliance period start January 1, 2023 · period end March 31, 2023 · first reported May 15, 2023 · EPA return-to-compliance field March 31, 2023

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3567 May 9, 2023 Informal State Violation/Reminder Notice
3570 May 31, 2023 Resolving State Compliance achieved
Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 15115 · Consumer Confidence Rule · Consumer Confidence Rule
Noncompliance period start October 2, 2022 · period end October 21, 2022 · first reported February 15, 2023 · EPA return-to-compliance field October 21, 2022

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3524 October 17, 2022 Informal State Violation/Reminder Notice
3526 October 21, 2022 Resolving State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3559	March 17, 2023	Informal	State Violation/Reminder Notice
3561	May 8, 2023	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3567	May 9, 2023	Informal	State Violation/Reminder Notice
3570	May 31, 2023	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3524	October 17, 2022	Informal	State Violation/Reminder Notice
3526	October 21, 2022	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Treatment Technique Precursor RemovalViolation 15124 · CARBON, TOTAL · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start October 1, 2022 · period end December 31, 2022 · first reported May 15, 2023 · EPA return-to-compliance field December 31, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3548	March 2, 2023	Informal	State Violation/Reminder Notice
3549	March 2, 2023	Informal	State Public Notification requested
3558	March 17, 2023	Informal	State Public Notification received
3581	August 9, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 15119 · CARBON, TOTAL · Stage 1 Disinfectants and Disinfection Byproducts Rule
Noncompliance period start October 1, 2022 · period end December 31, 2022 · first reported February 15, 2023 · EPA return-to-compliance field December 31, 2022

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3537 February 10, 2023 Informal State Violation/Reminder Notice
3543 February 10, 2023 Resolving State Compliance achieved
Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 15117 · Surface Water Treatment Rule · Surface Water Treatment Rule
Noncompliance period start September 1, 2022 · period end September 30, 2022 · first reported November 16, 2022 · EPA return-to-compliance field September 30, 2022

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3531 November 4, 2022 Informal State Violation/Reminder Notice
3528 November 9, 2022 Resolving State Compliance achieved
Monitoring or reporting · Resolved
Monitoring, Turbidity (Enhanced SWTR)Violation 15116 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Noncompliance period start September 1, 2022 · period end September 30, 2022 · first reported November 16, 2022 · EPA return-to-compliance field September 30, 2022

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3534 November 4, 2022 Informal State Violation/Reminder Notice
3528 November 9, 2022 Resolving State Compliance achieved
EPA health-based flag · Resolved
Treatment Technique Precursor RemovalViolation 15125 · CARBON, TOTAL · Stage 1 Disinfectants and Disinfection Byproducts Rule
Noncompliance period start July 1, 2022 · period end September 30, 2022 · first reported May 15, 2023 · EPA return-to-compliance field September 30, 2022

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3555 March 2, 2023 Informal State Violation/Reminder Notice
3581 August 9, 2023 Resolving State Compliance achieved
Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 15111 · Surface Water Treatment Rule · Surface Water Treatment Rule
Noncompliance period start March 1, 2022 · period end March 31, 2022 · first reported May 16, 2022 · EPA return-to-compliance field March 31, 2022

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3514 April 18, 2022 Informal State Violation/Reminder Notice
3518 April 18, 2022 Resolving State Compliance achieved
Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 15113 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule
Noncompliance period start January 1, 2022 · period end March 31, 2022 · first reported August 15, 2022 · EPA return-to-compliance field March 31, 2022

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3521 May 20, 2022 Informal State Violation/Reminder Notice
3523 May 20, 2022 Resolving State Compliance achieved
Monitoring or reporting · Resolved
Monitoring, Turbidity (Enhanced SWTR)Violation 15108 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Noncompliance period start January 1, 2022 · period end January 31, 2022 · first reported May 16, 2022 · EPA return-to-compliance field January 31, 2022

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3506 March 2, 2022 Informal State Violation/Reminder Notice
3536 November 9, 2022 Resolving State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3537	February 10, 2023	Informal	State Violation/Reminder Notice
3543	February 10, 2023	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3531	November 4, 2022	Informal	State Violation/Reminder Notice
3528	November 9, 2022	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3534	November 4, 2022	Informal	State Violation/Reminder Notice
3528	November 9, 2022	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3555	March 2, 2023	Informal	State Violation/Reminder Notice
3581	August 9, 2023	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3514	April 18, 2022	Informal	State Violation/Reminder Notice
3518	April 18, 2022	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3521	May 20, 2022	Informal	State Violation/Reminder Notice
3523	May 20, 2022	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3506	March 2, 2022	Informal	State Violation/Reminder Notice
3536	November 9, 2022	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Turbidity (Enhanced SWTR)Violation 15107 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment Rule

Noncompliance period start October 1, 2021 · period end October 31, 2021 · first reported February 16, 2022 · EPA return-to-compliance field October 31, 2021

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3503	December 8, 2021	Informal	State Violation/Reminder Notice
3504	December 8, 2021	Informal	State Public Notification requested
3508	December 10, 2021	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Follow-up Or Routine LCR Tap M/RViolation 15105 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start October 1, 2021 · period end November 9, 2022 · first reported February 16, 2022 · EPA return-to-compliance field November 9, 2022

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3498	November 24, 2021	Informal	State Violation/Reminder Notice
3499	November 24, 2021	Informal	State Public Notification requested
3527	November 9, 2022	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring of Treatment (SWTR-Filter)Violation 15103 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start September 1, 2021 · period end September 30, 2021 · first reported November 10, 2021 · EPA return-to-compliance field September 30, 2021

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3495	November 4, 2021	Informal	State Violation/Reminder Notice
3496	November 4, 2021	Informal	State Public Notification requested
3508	December 10, 2021	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring of Treatment (SWTR-Filter)Violation 15101 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start March 1, 2021 · period end March 31, 2021 · first reported May 17, 2021 · EPA return-to-compliance field March 31, 2021

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3487	April 21, 2021	Informal	State Violation/Reminder Notice
3488	April 21, 2021	Informal	State Public Notification requested
3490	May 9, 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