AZ0407532 · Arizona

EPCOR - TIERRA DEL RIO

Federal fiscal 2026Q3 · EPA violation and follow-up records

Violation records shown: 2
EPA health-based flag: 2
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 0

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 2 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 210 days. The interval uses the reporting periods and dates on file.

EPA health-based flag · Resolved

Failure To Address DeficiencyViolation 56 · Groundwater Rule · Ground Water Rule

Noncompliance period start September 17, 2025 · period end April 27, 2026 · first reported May 14, 2026 · EPA return-to-compliance field April 27, 2026

6 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
11	April 3, 2026	Resolving	State Compliance achieved
10	April 27, 2026	Informal	State Violation/Reminder Notice
13	April 27, 2026	Informal	State Violation/Reminder Notice
14	April 27, 2026	Resolving	State Compliance achieved
19	April 27, 2026	Informal	State Violation/Reminder Notice
20	April 27, 2026	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Failure To Address DeficiencyViolation 55 · Groundwater Rule · Ground Water Rule

Noncompliance period start September 17, 2025 · period end April 3, 2026 · first reported May 14, 2026 · EPA return-to-compliance field April 3, 2026

6 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
16	April 3, 2026	Informal	State Violation/Reminder Notice
17	April 3, 2026	Resolving	State Compliance achieved
22	April 3, 2026	Informal	State Violation/Reminder Notice
23	April 3, 2026	Resolving	State Compliance achieved
7	April 3, 2026	Informal	State Violation/Reminder Notice
8	April 3, 2026	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