AZ0407076 · Arizona
TONTO HILLS DWID
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 18
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 17
Counties listed by EPA · Maricopa 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 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 of Treatment (SWTR-Filter)Violation 8128 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start April 1, 2026 · period end April 30, 2026 · first reported August 14, 2026 · EPA return-to-compliance field April 30, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5393 June 12, 2026 Informal State Violation/Reminder Notice 5394 June 12, 2026 Resolving State Compliance achieved Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 8126 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start August 14, 2025 · first reported February 24, 2026
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5387 October 7, 2025 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Report Sample Result/Fail Monitor (RTCR)Violation 8125 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start July 1, 2025 · period end August 29, 2025 · first reported February 24, 2026 · EPA return-to-compliance field August 29, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5383 August 29, 2025 Informal State Violation/Reminder Notice 5384 August 29, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 8124 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start June 1, 2025 · period end June 30, 2025 · first reported August 15, 2025 · EPA return-to-compliance field June 30, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5380 August 3, 2025 Informal State Violation/Reminder Notice 5381 August 3, 2025 Informal State Public Notification requested 5392 April 8, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 8122 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start October 1, 2024 · period end October 31, 2024 · first reported February 18, 2025 · EPA return-to-compliance field October 31, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5371 November 27, 2024 Informal State Violation/Reminder Notice 5373 November 27, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 8121 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start September 1, 2024 · period end September 30, 2024 · first reported November 15, 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 5368 October 29, 2024 Informal State Violation/Reminder Notice 5370 October 29, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 8120 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start July 1, 2024 · period end July 31, 2024 · first reported November 15, 2024 · EPA return-to-compliance field July 31, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5365 August 27, 2024 Informal State Violation/Reminder Notice 5376 July 8, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Follow-up Or Routine LCR Tap M/RViolation 8119 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start July 1, 2024 · period end June 20, 2025 · first reported November 15, 2024 · EPA return-to-compliance field June 20, 2025
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5362 August 13, 2024 Informal State Violation/Reminder Notice 5363 August 13, 2024 Informal State Public Notification requested 5386 June 19, 2025 Informal State Public Notification received 5375 June 20, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 8110 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start October 1, 2023 · period end October 31, 2023 · first reported February 24, 2026 · EPA return-to-compliance field October 31, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5331 November 28, 2023 Informal State Violation/Reminder Notice 5332 November 28, 2023 Informal State Public Notification requested 5374 June 20, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 8109 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start September 1, 2023 · period end September 30, 2023 · first reported February 24, 2026 · EPA return-to-compliance field September 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5319 October 25, 2023 Informal State Violation/Reminder Notice 5320 October 25, 2023 Informal State Public Notification requested 5374 June 20, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 8107 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start August 1, 2023 · period end August 31, 2023 · first reported February 24, 2026 · EPA return-to-compliance field August 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5314 September 21, 2023 Informal State Violation/Reminder Notice 5315 September 21, 2023 Informal State Public Notification requested 5361 May 8, 2024 Informal State Public Notification received 5374 June 20, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 8106 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start July 1, 2023 · period end July 31, 2023 · first reported February 24, 2026 · EPA return-to-compliance field July 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5304 August 24, 2023 Informal State Violation/Reminder Notice 5305 August 24, 2023 Informal State Public Notification requested 5360 May 28, 2024 Informal State Public Notification received 5374 June 20, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Follow-up Or Routine LCR Tap M/RViolation 8105 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start July 1, 2023 · period end November 2, 2023 · first reported November 15, 2023 · EPA return-to-compliance field November 2, 2023
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5300 August 22, 2023 Informal State Violation/Reminder Notice 5323 November 2, 2023 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 8093 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start April 1, 2023 · period end June 30, 2023 · first reported February 24, 2026 · EPA return-to-compliance field June 30, 2023
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5283 August 9, 2023 Informal State Violation/Reminder Notice 5291 August 9, 2023 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 8078 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2022 · period end September 30, 2022 · first reported December 29, 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 5272 November 22, 2022 Resolving State Compliance achieved 5277 November 22, 2022 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 8073 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start July 1, 2022 · period end July 31, 2022 · first reported November 16, 2022 · EPA return-to-compliance field July 31, 2022
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5268 August 31, 2022 Informal State Violation/Reminder Notice 5267 September 22, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 8071 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2021 · period end September 30, 2021 · first reported February 16, 2022 · EPA return-to-compliance field September 30, 2021
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5262 November 15, 2021 Resolving State Compliance achieved 5260 November 23, 2021 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 8069 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start April 1, 2021 · period end June 30, 2021 · first reported August 12, 2021 · EPA return-to-compliance field June 30, 2021
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5255 July 25, 2021 Resolving State Compliance achieved 5253 August 9, 2021 Informal State Violation/Reminder Notice
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