AZ0407523 · Arizona
DESERT OASIS
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 7
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 7
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 7 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 90 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Resolved
Monitoring, RegularViolation 1546 · DICHLOROMETHANE · Volatile Organic ChemicalsNoncompliance 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 75 May 8, 2026 Informal State Violation/Reminder Notice 79 May 18, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1545 · DICHLOROMETHANE · Volatile Organic ChemicalsNoncompliance 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 71 May 8, 2026 Informal State Violation/Reminder Notice 79 May 18, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1540 · Arsenic · Arsenic RuleNoncompliance period start July 1, 2020 · period end September 30, 2020 · first reported March 31, 2021 · EPA return-to-compliance field September 30, 2020
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 59 November 24, 2020 Resolving State Compliance achieved 53 February 18, 2021 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Monitoring, RegularViolation 1538 · Arsenic · Arsenic RuleNoncompliance period start April 1, 2020 · period end June 30, 2020 · first reported March 31, 2021 · EPA return-to-compliance field June 30, 2020
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 59 November 24, 2020 Resolving State Compliance achieved 55 February 18, 2021 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Monitoring, RegularViolation 1539 · Arsenic · Arsenic RuleNoncompliance period start January 1, 2020 · period end March 31, 2020 · first reported March 31, 2021 · EPA return-to-compliance field March 31, 2020
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 59 November 24, 2020 Resolving State Compliance achieved 57 February 18, 2021 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Monitoring, RegularViolation 1543 · Arsenic · Arsenic RuleNoncompliance period start October 1, 2019 · period end December 31, 2019 · first reported March 29, 2024 · EPA return-to-compliance field December 31, 2019
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 64 February 14, 2024 Informal State Violation/Reminder Notice 68 February 14, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1542 · Arsenic · Arsenic RuleNoncompliance period start October 1, 2019 · period end December 31, 2019 · first reported March 29, 2024 · EPA return-to-compliance field December 31, 2019
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 60 February 14, 2024 Informal State Violation/Reminder Notice 68 February 14, 2024 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