COSTILLA, NM · Taos County

COSTILLA MDWCA Water System

Current status

3 open health-based violations on record as of July 4, 2026, alongside 1 other open item(s). See the violation history below for contaminant and status details.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace New Mexico’s official records. Always confirm current status with New Mexico before making decisions based on this information.

System facts

System ID (PWSID): NM3505929
System type: Community Water System
Population served: 244
Service connections: 100
Ownership: local government
Water source: groundwater (wells)

Violation history

LSL Inventory
Health-based
LEAD AND COPPER RULE REVISIONS
October 17, 2024
Unaddressed
Failure To Address Deficiency
Health-based
Groundwater Rule
July 3, 2024
Unaddressed
Failure To Address Deficiency
Health-based
Groundwater Rule
July 3, 2024
Unaddressed
Failure to Consult with State
—
Groundwater Rule
April 7, 2024
Unaddressed
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2023 – November 27, 2023
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
December 31, 2021 – March 2, 2022
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
December 19, 2021 – March 2, 2022
Resolved
Public Notification Violation without NPDWR Violation
—
Public Notice
October 6, 2021 – December 1, 2025
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2021 – February 22, 2022
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2021 – March 31, 2021
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2020 – December 31, 2020
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2020 – September 30, 2020
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2019 – September 17, 2020
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2019 – September 21, 2021
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2019 – June 27, 2020
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
April 27, 2018 – March 18, 2021
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2018 – December 31, 2018
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2018 – December 31, 2018
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
December 8, 2017 – March 28, 2019
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
September 30, 2017 – March 28, 2019
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
January 13, 2016 – November 14, 2015
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
January 13, 2016 – December 21, 2018
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
January 13, 2016 – December 21, 2018
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
January 13, 2016 – December 5, 2015
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2016 – December 31, 2016
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
March 19, 2015 – December 22, 2020
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2014 – February 6, 2017
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
August 1, 2014 – August 31, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 2014 – July 31, 2014
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2014 – July 28, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 2014 – June 30, 2014
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
February 1, 2014 – February 28, 2014
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
October 7, 2013 – October 15, 2013
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
August 1, 2013 – August 31, 2013
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
July 1, 2012 – July 31, 2012
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 2011 – July 31, 2011
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 2003 – November 30, 2003
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 1992 – January 31, 1992
Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
October 17, 2024	LSL Inventory	LEAD AND COPPER RULE REVISIONS	Health-based	Unaddressed
July 3, 2024	Failure To Address Deficiency	Groundwater Rule	Health-based	Unaddressed
July 3, 2024	Failure To Address Deficiency	Groundwater Rule	Health-based	Unaddressed
April 7, 2024	Failure to Consult with State	Groundwater Rule	—	Unaddressed
July 1, 2023 – November 27, 2023	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
December 31, 2021 – March 2, 2022	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
December 19, 2021 – March 2, 2022	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
October 6, 2021 – December 1, 2025	Public Notification Violation without NPDWR Violation	Public Notice	—	Resolved
July 1, 2021 – February 22, 2022	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2021 – March 31, 2021	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
October 1, 2020 – December 31, 2020	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2020 – September 30, 2020	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
October 1, 2019 – September 17, 2020	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
October 1, 2019 – September 21, 2021	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 2019 – June 27, 2020	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
April 27, 2018 – March 18, 2021	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 1, 2018 – December 31, 2018	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2018 – December 31, 2018	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
December 8, 2017 – March 28, 2019	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
September 30, 2017 – March 28, 2019	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 13, 2016 – November 14, 2015	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
January 13, 2016 – December 21, 2018	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
January 13, 2016 – December 21, 2018	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
January 13, 2016 – December 5, 2015	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
January 1, 2016 – December 31, 2016	Monitoring and Reporting (DBP)	TTHM	—	Resolved
March 19, 2015 – December 22, 2020	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
October 1, 2014 – February 6, 2017	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
August 1, 2014 – August 31, 2014	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 2014 – July 31, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2014 – July 28, 2014	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
June 1, 2014 – June 30, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
February 1, 2014 – February 28, 2014	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
October 7, 2013 – October 15, 2013	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
August 1, 2013 – August 31, 2013	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 2012 – July 31, 2012	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2011 – July 31, 2011	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
November 1, 2003 – November 30, 2003	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 1992 – January 31, 1992	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Enforcement actions

September 17, 2008State Technical Assistance Visit4 linked violations
September 8, 2008State Violation/Reminder Notice4 linked violations
August 13, 2007State Public Notification received2 linked violations
August 3, 2007State Public Notification requested5 linked violations
February 12, 2004State Violation/Reminder Notice2 linked violations

Contact

RIVERA, RICHARD

505-586-1271

COSTILLA, NM 87524