AZ0411018 · Arizona
MAMMOTH TOWN OF
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 13
- EPA health-based flag
- 1
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 7
Counties listed by EPA · Pinal 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 12 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
Lead Consumer NoticeViolation 6530 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start January 1, 2026 · period end April 1, 2026 · first reported May 14, 2026 · EPA return-to-compliance field April 1, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4572 April 1, 2026 Informal State Violation/Reminder Notice 4573 April 1, 2026 Resolving State Compliance achieved EPA health-based flag · Resolved
Public EducationViolation 6531 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start December 1, 2025 · period end April 6, 2026 · first reported May 14, 2026 · EPA return-to-compliance field April 6, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4575 April 6, 2026 Informal State Violation/Reminder Notice 4576 April 6, 2026 Resolving State Compliance achieved Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 6523 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start November 20, 2025 · period end December 29, 2025 · first reported February 13, 2026 · EPA return-to-compliance field December 29, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4556 December 29, 2025 Resolving State Compliance achieved 4554 January 2, 2026 Informal State Violation/Reminder Notice Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 6524 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start November 16, 2025 · period end December 29, 2025 · first reported February 13, 2026 · EPA return-to-compliance field December 29, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4558 December 29, 2025 Resolving State Compliance achieved 4552 January 2, 2026 Informal State Violation/Reminder Notice Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 6522 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start October 2, 2025 · period end October 10, 2025 · first reported February 13, 2026 · EPA return-to-compliance field October 10, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4549 October 10, 2025 Informal State Violation/Reminder Notice 4550 October 10, 2025 Resolving State Compliance achieved Monitoring or reporting · Unaddressed by formal action
Notification, Known or Potential LSLViolation 6525 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start July 2, 2025 · first reported February 13, 2026
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4560 January 29, 2026 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 6519 · Total Haloacetic Acids (HAA5) · 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
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4541 November 15, 2024 Informal State Violation/Reminder Notice 4542 November 15, 2024 Informal State Public Notification requested 4548 August 1, 2025 Resolving State Compliance achieved 4559 January 5, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 6518 · 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
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4541 November 15, 2024 Informal State Violation/Reminder Notice 4542 November 15, 2024 Informal State Public Notification requested 4548 August 1, 2025 Resolving State Compliance achieved 4559 January 5, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 6517 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start June 1, 2024 · period end June 30, 2024 · first reported November 15, 2024 · EPA return-to-compliance field June 30, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4534 August 5, 2024 Informal State Violation/Reminder Notice 4540 August 5, 2024 Resolving State Compliance achieved Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 6514 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start October 2, 2023 · period end April 9, 2024 · first reported March 29, 2024 · EPA return-to-compliance field April 9, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4531 October 20, 2023 Informal State Violation/Reminder Notice 4533 April 9, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 6521 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2023 · period end September 30, 2023 · first reported December 31, 2024 · EPA return-to-compliance field September 30, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4544 November 19, 2024 Informal State Violation/Reminder Notice 4545 November 19, 2024 Informal State Public Notification requested 4547 August 1, 2025 Resolving State Compliance achieved 4557 January 5, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 6520 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2023 · period end September 30, 2023 · first reported December 31, 2024 · EPA return-to-compliance field September 30, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4544 November 19, 2024 Informal State Violation/Reminder Notice 4545 November 19, 2024 Informal State Public Notification requested 4547 August 1, 2025 Resolving State Compliance achieved 4557 January 5, 2026 Informal State Public Notification received Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 6513 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start October 2, 2021 · period end October 7, 2021 · first reported February 16, 2022 · EPA return-to-compliance field October 7, 2021
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4530 October 7, 2021 Resolving State Compliance achieved 4528 October 25, 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