Is COSTILLA MDWCA required to publish a Consumer Confidence Report?

Yes. COSTILLA MDWCA is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is COSTILLA MDWCA’s next Consumer Confidence Report due?

COSTILLA MDWCA’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

COSTILLA, NM · Taos County

COSTILLA MDWCA Water System

Consumer Confidence Report status

COSTILLA MDWCA must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show 2 open health-based violations for COSTILLA MDWCA, alongside 2 other open items.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 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)

COSTILLA MDWCA is one of 667 community water systems in New Mexico in the 500 or fewer people size category, serving 244 people from groundwater.

As of August 1, 2026, its federal record holds 29 entries between 1991 and 2025, of which 2 health-based items remain open, alongside 2 other open entries.

Of the 29, 11 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Total Coliform Rules, the Public Notice Rule and Revised PN Rule, and the Groundwater Rule.

Violation history

Public Notification Violation for NPDWR Violation
—
Public Notice
March 7, 2025
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 Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2023 – November 27, 2023
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
December 31, 2021 – March 2, 2022
Resolved
Public Notification Violation without NPDWR Violation
—
Public Notice
October 6, 2021 – December 1, 2025
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2021 – March 2, 2022
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2020 – December 31, 2020
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
October 1, 2020 – October 31, 2020
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)
—
Total Haloacetic Acids (HAA5)
January 1, 2018 – December 31, 2018
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2018 – December 31, 2018
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
December 8, 2017 – March 28, 2019
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
June 1, 2016 – June 30, 2016
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
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 2014 – June 30, 2014
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2013 – July 28, 2014
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
July 13, 2012 – August 21, 2012
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
July 1, 2012 – July 31, 2012
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2011 – August 18, 2011
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2008 – September 30, 2008
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 1991 – May 31, 1991
Archived

Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
March 7, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	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
October 1, 2023 – November 27, 2023	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
December 31, 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
October 1, 2021 – March 2, 2022	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
October 1, 2020 – December 31, 2020	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
October 1, 2020 – October 31, 2020	Monitoring, Routine (RTCR)	Revised Total Coliform 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)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2018 – December 31, 2018	Monitoring and Reporting (DBP)	TTHM	—	Resolved
December 8, 2017 – March 28, 2019	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
June 1, 2016 – June 30, 2016	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	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
June 1, 2014 – June 30, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2013 – July 28, 2014	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 13, 2012 – August 21, 2012	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
July 1, 2012 – July 31, 2012	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2011 – August 18, 2011	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
September 1, 2008 – September 30, 2008	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
May 1, 1991 – May 31, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived

Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

July 26, 2010State Compliance achieved3 linked violations
September 11, 2008State Public Notification received4 linked violations
September 8, 2008State Violation/Reminder Notice4 linked violations
August 3, 2007State Public Notification requested5 linked violations
July 31, 2007State Public Notification received7 linked violations
July 24, 2007State Violation/Reminder Notice6 linked violations
February 12, 2004State Violation/Reminder Notice2 linked violations
September 4, 1996State Violation/Reminder Notice3 linked violations
March 11, 1992State Public Notification requested2 linked violations
May 10, 1991State Violation/Reminder Notice4 linked violations

Common questions

Is COSTILLA MDWCA required to publish a Consumer Confidence Report?: Yes. COSTILLA MDWCA is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is COSTILLA MDWCA’s next Consumer Confidence Report due?: COSTILLA MDWCA’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does COSTILLA MDWCA have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show 2 open health-based violations for COSTILLA MDWCA, alongside 2 other open items.
What is a Consumer Confidence Report?: A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

RIVERA, RICHARD

505-586-1271

COSTILLA, NM 87524