AZ0410001 · Arizona
AJO IMPROVEMENT COMPANY
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 10
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 10
Counties listed by EPA · Pima 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 10 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 90.5 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Resolved
Report Sample Result/Fail Monitor (RTCR)Violation 4197 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start November 1, 2024 · period end December 30, 2024 · first reported February 18, 2025 · EPA return-to-compliance field December 30, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 789 December 18, 2024 Informal State Violation/Reminder Notice 792 December 30, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Report Sample Result/Fail Monitor (RTCR)Violation 4196 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start October 1, 2024 · period end December 5, 2024 · first reported February 18, 2025 · EPA return-to-compliance field December 5, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 782 November 21, 2024 Informal State Violation/Reminder Notice 787 December 5, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Report Sample Result/Fail Monitor (RTCR)Violation 4193 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start September 1, 2024 · period end October 11, 2024 · first reported February 24, 2026 · EPA return-to-compliance field October 11, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 776 October 11, 2024 Informal State Violation/Reminder Notice 778 October 11, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 4195 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2024 · period end September 30, 2024 · first reported February 24, 2026 · 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 779 November 21, 2024 Informal State Violation/Reminder Notice 785 December 5, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 4194 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2024 · period end September 30, 2024 · first reported December 31, 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 779 November 21, 2024 Informal State Violation/Reminder Notice 785 December 5, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 4191 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start October 1, 2023 · period end December 31, 2023 · first reported February 24, 2026 · 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 769 February 15, 2024 Informal State Violation/Reminder Notice 770 February 15, 2024 Informal State Public Notification requested 775 July 17, 2024 Resolving State Compliance achieved 793 July 17, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 4190 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start October 1, 2023 · period end December 31, 2023 · first reported February 24, 2026 · 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 769 February 15, 2024 Informal State Violation/Reminder Notice 770 February 15, 2024 Informal State Public Notification requested 775 July 17, 2024 Resolving State Compliance achieved 793 July 17, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 4188 · Arsenic · Arsenic 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 766 July 20, 2023 Informal State Violation/Reminder Notice 768 July 20, 2023 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 4187 · Arsenic · Arsenic RuleNoncompliance period start January 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 765 April 22, 2022 Resolving State Compliance achieved 763 April 27, 2022 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Monitoring, RegularViolation 4186 · Arsenic · Arsenic 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 762 October 22, 2021 Resolving State Compliance achieved 760 November 15, 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