NM3535021 · New Mexico

ALCALDE MDWCA

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

Violation records shown: 24
EPA health-based flag: 10
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 2

Counties listed by EPA · Rio Arriba County, New Mexico

Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.

Violations and what followed

Among 23 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 395 days. The interval uses the reporting periods and dates on file.

EPA health-based flag · Archived

Maximum Contaminant Level Violation, AverageViolation 20692 · Arsenic · Arsenic Rule

Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported June 16, 2026 · EPA return-to-compliance field March 31, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43173	February 24, 2026	Informal	State Violation/Reminder Notice
43174	February 24, 2026	Informal	State Public Notification requested
43177	April 28, 2026	Informal	State Public Notification received

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 20691 · Arsenic · Arsenic Rule

Noncompliance period start July 1, 2025 · period end September 30, 2025 · first reported December 3, 2025 · EPA return-to-compliance field September 30, 2025

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43157	May 6, 2024	Formal	State Administrative/Compliance Order without penalty issued
43171	October 15, 2025	Informal	State Violation/Reminder Notice
43172	October 15, 2025	Informal	State Public Notification requested
43175	November 19, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 20690 · Arsenic · Arsenic Rule

Noncompliance period start April 1, 2025 · period end June 30, 2025 · first reported September 23, 2025 · EPA return-to-compliance field June 30, 2025

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43157	May 6, 2024	Formal	State Administrative/Compliance Order without penalty issued
43169	June 11, 2025	Informal	State Violation/Reminder Notice
43170	June 11, 2025	Informal	State Public Notification requested
43175	November 19, 2025	Resolving	State Compliance achieved

Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 20700 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start March 21, 2025 · period end April 20, 2026 · first reported June 16, 2026 · EPA return-to-compliance field April 20, 2026

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
43176 April 20, 2026 Resolving State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43176	April 20, 2026	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 20689 · Arsenic · Arsenic Rule

Noncompliance period start January 1, 2025 · period end March 31, 2025 · first reported June 25, 2025 · EPA return-to-compliance field March 31, 2025

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43157	May 6, 2024	Formal	State Administrative/Compliance Order without penalty issued
43167	April 8, 2025	Informal	State Violation/Reminder Notice
43168	April 8, 2025	Informal	State Public Notification requested
43175	November 19, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 20688 · Arsenic · Arsenic Rule

Noncompliance period start October 1, 2024 · period end December 31, 2024 · first reported March 31, 2025 · EPA return-to-compliance field December 31, 2024

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43157	May 6, 2024	Formal	State Administrative/Compliance Order without penalty issued
43164	February 10, 2025	Informal	State Violation/Reminder Notice
43165	February 10, 2025	Informal	State Public Notification requested
43166	March 4, 2025	Informal	State Public Notification received
43175	November 19, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 20686 · Arsenic · Arsenic Rule

Noncompliance period start July 1, 2024 · period end September 30, 2024 · first reported March 31, 2025 · EPA return-to-compliance field September 30, 2024

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43157	May 6, 2024	Formal	State Administrative/Compliance Order without penalty issued
43160	September 30, 2024	Informal	State Violation/Reminder Notice
43161	September 30, 2024	Informal	State Public Notification requested
43163	October 31, 2024	Informal	State Public Notification received
43175	November 19, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 20685 · Arsenic · Arsenic Rule

Noncompliance period start April 1, 2024 · period end June 30, 2024 · first reported August 16, 2024 · EPA return-to-compliance field June 30, 2024

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43155	April 22, 2024	Informal	State Violation/Reminder Notice
43156	April 22, 2024	Informal	State Public Notification requested
43157	May 6, 2024	Formal	State Administrative/Compliance Order without penalty issued
43158	May 9, 2024	Informal	State Public Notification received
43175	November 19, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 20684 · Arsenic · Arsenic Rule

Noncompliance period start January 1, 2024 · period end March 31, 2024 · first reported May 2, 2024 · EPA return-to-compliance field March 31, 2024

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43153	April 4, 2024	Informal	State Violation/Reminder Notice
43154	April 4, 2024	Informal	State Public Notification requested
43157	May 6, 2024	Formal	State Administrative/Compliance Order without penalty issued
43159	May 9, 2024	Informal	State Public Notification received
43175	November 19, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 20680 · Arsenic · Arsenic Rule

Noncompliance period start October 1, 2023 · period end December 31, 2023 · first reported March 28, 2024 · EPA return-to-compliance field December 31, 2023

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43147	December 20, 2023	Informal	State Violation/Reminder Notice
43148	December 20, 2023	Informal	State Public Notification requested
43149	January 24, 2024	Informal	State Public Notification received
43157	May 6, 2024	Formal	State Administrative/Compliance Order without penalty issued
43175	November 19, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 20679 · Arsenic · Arsenic Rule

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported March 28, 2024 · EPA return-to-compliance field September 30, 2023

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43147	December 20, 2023	Informal	State Violation/Reminder Notice
43148	December 20, 2023	Informal	State Public Notification requested
43149	January 24, 2024	Informal	State Public Notification received
43157	May 6, 2024	Formal	State Administrative/Compliance Order without penalty issued
43175	November 19, 2025	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 20682 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start October 1, 2021 · period end September 30, 2022 · first reported May 2, 2024 · EPA return-to-compliance field September 30, 2022

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43152	September 14, 2023	Resolving	State Compliance achieved
43150	March 20, 2024	Informal	State Violation/Reminder Notice
43151	March 20, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 20681 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start October 1, 2021 · period end September 30, 2022 · first reported May 2, 2024 · EPA return-to-compliance field September 30, 2022

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43152	September 14, 2023	Resolving	State Compliance achieved
43150	March 20, 2024	Informal	State Violation/Reminder Notice
43151	March 20, 2024	Informal	State Public Notification requested

Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 20675 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start March 18, 2021 · period end July 27, 2023 · first reported November 29, 2021 · EPA return-to-compliance field July 27, 2023

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
43146 July 27, 2023 Resolving State Compliance achieved
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 20703 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start January 5, 2012 · period end April 20, 2026 · first reported June 16, 2026 · EPA return-to-compliance field April 20, 2026

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
43176 April 20, 2026 Resolving State Compliance achieved
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 20702 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start January 5, 2012 · period end April 20, 2026 · first reported June 16, 2026 · EPA return-to-compliance field April 20, 2026

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
43176 April 20, 2026 Resolving State Compliance achieved
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 20699 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start January 5, 2012 · period end April 20, 2026 · first reported June 16, 2026 · EPA return-to-compliance field April 20, 2026

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
43176 April 20, 2026 Resolving State Compliance achieved
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 20698 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start January 5, 2012 · period end April 20, 2026 · first reported June 16, 2026 · EPA return-to-compliance field April 20, 2026

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
43176 April 20, 2026 Resolving State Compliance achieved
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 20697 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start January 5, 2012 · period end April 20, 2026 · first reported June 16, 2026 · EPA return-to-compliance field April 20, 2026

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
43176 April 20, 2026 Resolving State Compliance achieved
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 20695 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start January 5, 2012 · period end April 20, 2026 · first reported June 16, 2026 · EPA return-to-compliance field April 20, 2026

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
43176 April 20, 2026 Resolving State Compliance achieved
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 20694 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start January 5, 2012 · period end April 20, 2026 · first reported June 16, 2026 · EPA return-to-compliance field April 20, 2026

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
43176 April 20, 2026 Resolving State Compliance achieved
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 20693 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start January 5, 2012 · period end April 20, 2026 · first reported June 16, 2026 · EPA return-to-compliance field April 20, 2026

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
43176 April 20, 2026 Resolving State Compliance achieved
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 20701 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start December 1, 2011 · period end April 20, 2026 · first reported June 16, 2026 · EPA return-to-compliance field April 20, 2026

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
43176 April 20, 2026 Resolving State Compliance achieved
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 20696 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start December 1, 2011 · period end April 20, 2026 · first reported June 16, 2026 · EPA return-to-compliance field April 20, 2026

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
43176 April 20, 2026 Resolving State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43146	July 27, 2023	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43176	April 20, 2026	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43176	April 20, 2026	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43176	April 20, 2026	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43176	April 20, 2026	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43176	April 20, 2026	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43176	April 20, 2026	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43176	April 20, 2026	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43176	April 20, 2026	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43176	April 20, 2026	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
43176	April 20, 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