AZ0407095 · Arizona
MESA CITY OF
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 27
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 27
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 27 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 364 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 151817 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start August 1, 2025 · period end August 31, 2025 · first reported November 17, 2025 · EPA return-to-compliance field August 31, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84464 October 7, 2025 Informal State Violation/Reminder Notice 84465 October 7, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 151815 · Bromate · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start March 1, 2025 · period end March 31, 2025 · first reported May 13, 2025 · EPA return-to-compliance field March 31, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84453 May 2, 2025 Informal State Violation/Reminder Notice 84454 May 2, 2025 Informal State Public Notification requested 84463 June 20, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 151816 · Bromate · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start February 1, 2025 · period end February 28, 2025 · first reported May 13, 2025 · EPA return-to-compliance field February 28, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84457 May 2, 2025 Informal State Violation/Reminder Notice 84458 May 2, 2025 Informal State Public Notification requested 84463 June 20, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151808 · Di(2-ethylhexyl) phthalate · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end March 31, 2023 · first reported March 29, 2024 · 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 84445 February 8, 2024 Informal State Violation/Reminder Notice 84447 May 21, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151749 · Styrene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151748 · Ethylbenzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151747 · Toluene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151746 · Benzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151745 · CHLOROBENZENE · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151744 · Tetrachloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151743 · 1,1,2-Trichloroethane · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151742 · Trichloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151741 · 1,2-Dichloropropane · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151740 · Carbon tetrachloride · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151739 · 1,1,1-Trichloroethane · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151738 · 1,2-Dichloroethane · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151737 · trans-1,2-Dichloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151736 · 1,1-Dichloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151735 · Vinyl chloride · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151734 · p-Dichlorobenzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151733 · o-Dichlorobenzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151732 · DICHLOROMETHANE · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151731 · Xylenes, Total · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151730 · cis-1,2-Dichloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 151729 · 1,2,4-Trichlorobenzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end December 31, 2023 · first reported August 15, 2025 · EPA return-to-compliance field December 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84428 August 9, 2023 Informal State Violation/Reminder Notice 84429 August 9, 2023 Informal State Public Notification requested 84430 August 9, 2023 Informal State Public Notification received 84461 April 18, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 151581 · CARBON, TOTAL · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2021 · period end March 17, 2021 · first reported August 12, 2021 · EPA return-to-compliance field March 17, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84421 March 17, 2021 Resolving State Compliance achieved 84417 May 20, 2021 Informal State Violation/Reminder Notice 84418 May 20, 2021 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 151545 · Chlorite · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2020 · period end July 31, 2020 · first reported February 2, 2021 · EPA return-to-compliance field July 31, 2020
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 84408 November 17, 2020 Resolving State Compliance achieved 84406 December 9, 2020 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