NM3505929 · New Mexico
COSTILLA MDWCA
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 32
- EPA health-based flag
- 6
- Health-based records unresolved in this snapshot
- 6
- Monitoring and reporting records
- 9
Counties listed by EPA · Taos 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 24 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 110 days. The interval uses the reporting periods and dates on file.
EPA health-based flag · Addressed by formal action
LSL InventoryViolation 111672 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start October 17, 2024 · first reported June 25, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 145 March 31, 2025 Informal State Violation/Reminder Notice 146 March 31, 2025 Informal State Public Notification requested 9999900000000000001 May 5, 2026 Formal Federal Final Administrative Order issued EPA health-based flag · Unaddressed by formal action
Failure To Address DeficiencyViolation 111678 · Groundwater Rule · Ground Water RuleNoncompliance period start July 3, 2024 · first reported March 31, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 154 March 5, 2026 Informal State Violation/Reminder Notice 155 March 5, 2026 Informal State Public Notification requested EPA health-based flag · Unaddressed by formal action
Failure To Address DeficiencyViolation 111677 · Groundwater Rule · Ground Water RuleNoncompliance period start July 3, 2024 · first reported March 31, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 154 March 5, 2026 Informal State Violation/Reminder Notice 155 March 5, 2026 Informal State Public Notification requested EPA health-based flag · Unaddressed by formal action
Failure To Address DeficiencyViolation 111676 · Groundwater Rule · Ground Water RuleNoncompliance period start July 3, 2024 · first reported March 31, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 154 March 5, 2026 Informal State Violation/Reminder Notice 155 March 5, 2026 Informal State Public Notification requested EPA health-based flag · Unaddressed by formal action
Failure To Address DeficiencyViolation 111675 · Groundwater Rule · Ground Water RuleNoncompliance period start July 3, 2024 · first reported March 31, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 154 March 5, 2026 Informal State Violation/Reminder Notice 155 March 5, 2026 Informal State Public Notification requested EPA health-based flag · Unaddressed by formal action
Failure To Address DeficiencyViolation 111620 · Groundwater Rule · Ground Water RuleNoncompliance period start October 17, 2012 · first reported August 15, 2014
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 33 March 6, 2014 Informal State Violation/Reminder Notice 34 March 6, 2014 Informal State Public Notification requested 37 March 11, 2014 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 111681 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start May 1, 2026 · period end May 31, 2026 · first reported September 17, 2026 · EPA return-to-compliance field May 31, 2026
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 162 June 13, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 111680 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start March 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 159 April 14, 2026 Resolving State Compliance achieved 157 May 11, 2026 Informal State Violation/Reminder Notice 158 May 11, 2026 Informal State Public Notification requested Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 111674 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2025 · period end August 1, 2025 · first reported December 3, 2025 · EPA return-to-compliance field August 1, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 150 August 1, 2025 Resolving State Compliance achieved 149 August 11, 2025 Informal State Violation/Reminder Notice Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 111679 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start March 7, 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 156 April 20, 2026 Resolving State Compliance achieved Monitoring or reporting · Addressed by formal action
LSL ReportingViolation 111673 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start October 17, 2024 · first reported June 25, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 147 March 31, 2025 Informal State Violation/Reminder Notice 148 March 31, 2025 Informal State Public Notification requested 9999900000000000001 May 5, 2026 Formal Federal Final Administrative Order issued Other or unclassified · Resolved
Failure to Consult with StateViolation 111671 · Groundwater Rule · Ground Water RuleNoncompliance period start April 7, 2024 · period end December 5, 2025 · first reported March 31, 2025 · EPA return-to-compliance field December 5, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 143 December 18, 2024 Informal State Violation/Reminder Notice 144 December 18, 2024 Informal State Public Notification requested 165 December 5, 2025 Resolving State Compliance achieved Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 111668 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start October 1, 2023 · period end November 27, 2023 · first reported March 31, 2025 · EPA return-to-compliance field November 27, 2023
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 142 November 27, 2023 Resolving State Compliance achieved 139 November 24, 2024 Informal State Violation/Reminder Notice Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 111666 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2023 · period end November 27, 2023 · first reported November 17, 2023 · EPA return-to-compliance field November 27, 2023
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 134 August 2, 2023 Informal State Violation/Reminder Notice 135 November 27, 2023 Resolving State Compliance achieved Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 111664 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start December 31, 2021 · period end March 2, 2022 · first reported May 19, 2022 · EPA return-to-compliance field March 2, 2022
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 128 March 2, 2022 Resolving State Compliance achieved Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 111663 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start December 19, 2021 · period end March 2, 2022 · first reported May 19, 2022 · EPA return-to-compliance field March 2, 2022
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 127 March 2, 2022 Resolving State Compliance achieved Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 111665 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start October 24, 2021 · period end March 2, 2022 · first reported May 19, 2022 · EPA return-to-compliance field March 2, 2022
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 126 March 2, 2022 Resolving State Compliance achieved Other or unclassified · Resolved
Public Notification Violation without NPDWR ViolationViolation 111662 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start October 6, 2021 · period end December 1, 2025 · first reported February 23, 2022 · EPA return-to-compliance field December 1, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 152 December 1, 2025 Resolving State Compliance achieved Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 111669 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start October 1, 2021 · period end March 2, 2022 · first reported March 31, 2025 · EPA return-to-compliance field March 2, 2022
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 141 March 2, 2022 Resolving State Compliance achieved 139 November 24, 2024 Informal State Violation/Reminder Notice Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 111661 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2021 · period end February 22, 2022 · first reported September 27, 2021 · EPA return-to-compliance field February 22, 2022
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 117 July 14, 2021 Informal State Violation/Reminder Notice 121 February 22, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 111667 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2021 · period end March 31, 2021 · first reported May 2, 2024 · EPA return-to-compliance field March 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 136 March 6, 2024 Informal State Violation/Reminder Notice 137 March 6, 2024 Informal State Public Notification requested 138 March 6, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 111655 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start November 1, 2020 · period end November 30, 2020 · first reported February 22, 2021 · EPA return-to-compliance field November 30, 2020
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 116 December 29, 2020 Resolving State Compliance achieved 111 December 30, 2020 Informal State Violation/Reminder Notice 112 December 30, 2020 Informal State Public Notification requested 123 March 2, 2022 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 111658 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start October 1, 2020 · period end December 31, 2020 · first reported March 25, 2021 · EPA return-to-compliance field December 31, 2020
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 113 February 22, 2021 Informal State Violation/Reminder Notice 114 February 22, 2021 Informal State Public Notification requested 118 April 1, 2021 Resolving State Compliance achieved 122 March 2, 2022 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 111654 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start October 1, 2020 · period end October 31, 2020 · first reported February 22, 2021 · EPA return-to-compliance field October 31, 2020
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 106 December 18, 2020 Informal State Violation/Reminder Notice 107 December 18, 2020 Informal State Public Notification requested 116 December 29, 2020 Resolving State Compliance achieved 124 March 2, 2022 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 111660 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2020 · period end September 30, 2020 · first reported March 25, 2021 · EPA return-to-compliance field September 30, 2020
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 113 February 22, 2021 Informal State Violation/Reminder Notice 114 February 22, 2021 Informal State Public Notification requested 118 April 1, 2021 Resolving State Compliance achieved 122 March 2, 2022 Informal State Public Notification received Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 111670 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start October 1, 2019 · period end September 17, 2020 · first reported March 31, 2025 · EPA return-to-compliance field September 17, 2020
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 140 September 17, 2020 Resolving State Compliance achieved 139 November 24, 2024 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Follow-up Or Routine LCR Tap M/RViolation 111648 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start October 1, 2019 · period end September 21, 2021 · first reported February 18, 2020 · EPA return-to-compliance field September 21, 2021
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 94 December 23, 2019 Informal State Violation/Reminder Notice 95 December 23, 2019 Informal State Public Notification requested 97 June 19, 2020 Informal State Public Notification received 119 September 21, 2021 Resolving State Compliance achieved Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 111656 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start April 27, 2018 · period end March 18, 2021 · first reported February 22, 2021 · EPA return-to-compliance field March 18, 2021
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 115 March 18, 2021 Resolving State Compliance achieved Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 111653 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start June 10, 2017 · period end June 27, 2020 · first reported February 22, 2021 · EPA return-to-compliance field June 27, 2020
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 105 June 27, 2020 Resolving State Compliance achieved Other or unclassified · Resolved
Sample Siting Plan Errors (RTCR)Violation 111682 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start June 2, 2016 · period end July 26, 2016 · first reported September 17, 2026 · EPA return-to-compliance field July 26, 2016
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 164 July 26, 2016 Resolving State Compliance achieved 163 November 23, 2016 Informal State Violation/Reminder Notice Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 111652 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start March 19, 2015 · period end December 22, 2020 · first reported February 22, 2021 · EPA return-to-compliance field December 22, 2020
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 108 December 22, 2020 Resolving State Compliance achieved Other or unclassified · Unaddressed by formal action
Consumer Confidence Report Complete Failure to ReportViolation 104 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2002 · first reported November 15, 2005
No linked action row appears in the records shown.
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.
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