Is BIG MESA WATER MDWCA required to publish a Consumer Confidence Report?

Yes. BIG MESA WATER 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 BIG MESA WATER MDWCA’s next Consumer Confidence Report due?

BIG MESA WATER 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.

CONCHAS DAM, NM · San Miguel County

BIG MESA WATER MDWCA Water System

Consumer Confidence Report status

BIG MESA WATER 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 no open violations for BIG MESA WATER MDWCA.

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): NM3573725
System type: Community Water System
Population served: 250
Service connections: 572
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

BIG MESA WATER MDWCA is one of 667 community water systems in New Mexico in the 500 or fewer people size category, serving 250 people from surface water.

As of August 1, 2026, its federal record holds 51 entries between 1982 and 2017, all of which EPA lists as closed. Nothing has been added since 2017.

Of the 51, 39 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 Surface Water Treatment Rules, the Stage 1 Disinfectants and Disinfection Byproducts Rule, and the Public Notice Rule and Revised PN Rule.

Violation history

Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
January 1, 2017 – January 31, 2017
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
March 1, 2016 – March 31, 2016
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
December 1, 2015 – December 31, 2015
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
December 1, 2015 – December 31, 2015
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
March 22, 2014 – March 28, 2014
Resolved
Monitoring and Reporting (DBP)
—
TTHM
October 1, 2013 – December 31, 2013
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2013 – December 31, 2013
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 2012 – July 31, 2012
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
February 1, 2011 – February 28, 2011
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
February 1, 2011 – February 28, 2011
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
January 1, 2011 – January 31, 2011
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
January 1, 2011 – January 31, 2011
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
November 1, 2010 – November 30, 2010
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
November 1, 2010 – November 30, 2010
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
October 1, 2010 – October 31, 2010
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
October 1, 2010 – October 31, 2010
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
August 1, 2010 – August 31, 2010
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
June 1, 2010 – June 30, 2010
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
June 1, 2010 – June 30, 2010
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
May 1, 2010 – May 31, 2010
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
March 1, 2010 – March 31, 2010
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
March 1, 2010 – March 31, 2010
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2010 – March 31, 2010
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
January 1, 2010 – January 31, 2010
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
November 1, 2009 – November 30, 2009
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
November 1, 2009 – November 30, 2009
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
August 1, 2009 – August 31, 2009
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
August 1, 2009 – August 31, 2009
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
June 1, 2009 – June 30, 2009
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
June 1, 2009 – June 30, 2009
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
February 1, 2009 – February 28, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2009 – March 31, 2009
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2009 – March 31, 2009
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
December 1, 2008 – December 31, 2008
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2008 – December 31, 2008
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2008 – December 31, 2008
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
October 1, 2008 – October 31, 2008
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2008 – September 30, 2008
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
June 1, 2008 – June 30, 2008
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
June 1, 2008 – June 30, 2008
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
April 1, 2008 – April 30, 2008
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
April 1, 2008 – April 30, 2008
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2008 – June 30, 2008
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
March 28, 2008 – October 22, 2010
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
February 2, 2008 – October 22, 2010
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2008 – March 31, 2008
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
April 22, 2007 – October 22, 2010
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
February 11, 2007 – October 22, 2010
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 1991 – March 31, 1991
Archived
Monitoring, Regular
—
Arsenic
July 1, 1982 – June 30, 1985
Archived
Monitoring, Regular
—
Cadmium
July 1, 1982 – June 30, 1985
Archived

Resolved 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
January 1, 2017 – January 31, 2017	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
March 1, 2016 – March 31, 2016	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
December 1, 2015 – December 31, 2015	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
December 1, 2015 – December 31, 2015	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
March 22, 2014 – March 28, 2014	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
October 1, 2013 – December 31, 2013	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2013 – December 31, 2013	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2012 – July 31, 2012	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
February 1, 2011 – February 28, 2011	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
February 1, 2011 – February 28, 2011	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2011 – January 31, 2011	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2011 – January 31, 2011	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
November 1, 2010 – November 30, 2010	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
November 1, 2010 – November 30, 2010	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
October 1, 2010 – October 31, 2010	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
October 1, 2010 – October 31, 2010	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
August 1, 2010 – August 31, 2010	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
June 1, 2010 – June 30, 2010	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
June 1, 2010 – June 30, 2010	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
May 1, 2010 – May 31, 2010	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
March 1, 2010 – March 31, 2010	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
March 1, 2010 – March 31, 2010	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2010 – March 31, 2010	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2010 – January 31, 2010	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
November 1, 2009 – November 30, 2009	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
November 1, 2009 – November 30, 2009	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
August 1, 2009 – August 31, 2009	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
August 1, 2009 – August 31, 2009	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
June 1, 2009 – June 30, 2009	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
June 1, 2009 – June 30, 2009	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
February 1, 2009 – February 28, 2009	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2009 – March 31, 2009	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2009 – March 31, 2009	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
December 1, 2008 – December 31, 2008	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
October 1, 2008 – December 31, 2008	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
October 1, 2008 – December 31, 2008	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2008 – October 31, 2008	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
July 1, 2008 – September 30, 2008	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
June 1, 2008 – June 30, 2008	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
June 1, 2008 – June 30, 2008	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
April 1, 2008 – April 30, 2008	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
April 1, 2008 – April 30, 2008	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
April 1, 2008 – June 30, 2008	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
March 28, 2008 – October 22, 2010	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
February 2, 2008 – October 22, 2010	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 1, 2008 – March 31, 2008	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
April 22, 2007 – October 22, 2010	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
February 11, 2007 – October 22, 2010	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
March 1, 1991 – March 31, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
July 1, 1982 – June 30, 1985	Monitoring, Regular	Arsenic	—	Archived
July 1, 1982 – June 30, 1985	Monitoring, Regular	Cadmium	—	Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

February 21, 2024State Compliance achieved2 linked violations
February 7, 2024State Public Notification requested1 linked violation
August 9, 2022State Violation/Reminder Notice2 linked violations
June 14, 2022State Compliance achieved2 linked violations
February 24, 2020State Compliance achieved1 linked violation
February 14, 2020State Violation/Reminder Notice1 linked violation
August 14, 2019State Compliance achieved2 linked violations
July 2, 2018State Compliance achieved1 linked violation
May 15, 2018State Public Notification received2 linked violations
May 15, 2018State Public Notification received2 linked violations
January 31, 2018State Public Notification received2 linked violations
January 31, 2018State Compliance achieved1 linked violation
January 31, 2018State Compliance achieved1 linked violation
January 31, 2018State Public Notification received2 linked violations
November 28, 2017State Violation/Reminder Notice2 linked violations
November 28, 2017State Public Notification requested2 linked violations
October 6, 2017State Compliance achieved3 linked violations
June 15, 2017State Public Notification requested2 linked violations
June 15, 2017State Compliance achieved2 linked violations
June 15, 2017State Compliance achieved1 linked violation
June 15, 2017State Violation/Reminder Notice2 linked violations
April 26, 2017State Violation/Reminder Notice3 linked violations
November 17, 2016State Compliance achieved3 linked violations
November 17, 2016State Compliance achieved4 linked violations
February 2, 2016State Public Notification received3 linked violations
February 2, 2016State Public Notification received3 linked violations
January 12, 2016State Public Notification requested3 linked violations
January 12, 2016State Violation/Reminder Notice2 linked violations
January 12, 2016State Public Notification requested3 linked violations
January 12, 2016State Violation/Reminder Notice3 linked violations
March 28, 2014State Compliance achieved4 linked violations
March 13, 2014State Compliance achieved5 linked violations
February 21, 2014State Public Notification requested4 linked violations
February 21, 2014State Violation/Reminder Notice4 linked violations
April 21, 2011State Public Notification requested11 linked violations
April 21, 2011State Violation/Reminder Notice2 linked violations
April 21, 2011State Violation/Reminder Notice2 linked violations
April 21, 2011State Public Notification requested2 linked violations
April 21, 2011State Public Notification requested1 linked violation
April 21, 2011State Violation/Reminder Notice10 linked violations
April 15, 2011State Public Notification requested2 linked violations
April 15, 2011State Violation/Reminder Notice2 linked violations
April 15, 2011State Violation/Reminder Notice5 linked violations
April 15, 2011State Compliance achieved18 linked violations
April 15, 2011State Public Notification requested2 linked violations
April 15, 2011State Public Notification requested2 linked violations
April 15, 2011State Public Notification requested2 linked violations
April 15, 2011State Violation/Reminder Notice1 linked violation
April 15, 2011State Public Notification requested1 linked violation
April 15, 2011State Public Notification requested2 linked violations
April 15, 2011State Violation/Reminder Notice1 linked violation
April 15, 2011State Public Notification requested2 linked violations
April 15, 2011State Violation/Reminder Notice2 linked violations
April 15, 2011State Violation/Reminder Notice3 linked violations
April 15, 2011State Public Notification requested2 linked violations
April 8, 2011State Violation/Reminder Notice4 linked violations
April 8, 2011State Public Notification requested4 linked violations
December 17, 2010State Compliance achieved8 linked violations
October 22, 2010State Compliance achieved3 linked violations
October 22, 2010State Compliance achieved1 linked violation
October 22, 2010State Compliance achieved1 linked violation
October 22, 2010State Compliance achieved1 linked violation
December 22, 2008State Compliance achieved3 linked violations
January 2, 2008State Violation/Reminder Notice1 linked violation
September 10, 2007State Violation/Reminder Notice2 linked violations
September 10, 2007State Public Notification requested1 linked violation
March 22, 2007State Violation/Reminder Notice1 linked violation
March 10, 2007State Compliance Meeting conducted4 linked violations
March 5, 2007State Formal Notice of Violation issued5 linked violations
February 26, 2007State Technical Assistance Visit4 linked violations
January 25, 2007State Technical Assistance Visit7 linked violations
January 11, 2007State Violation/Reminder Notice2 linked violations
January 11, 2007State Public Notification requested1 linked violation
June 21, 2006State Technical Assistance Visit3 linked violations
June 13, 2005State Public Notification received9 linked violations
May 7, 1991State Public Notification requested3 linked violations

Common questions

Is BIG MESA WATER MDWCA required to publish a Consumer Confidence Report?: Yes. BIG MESA WATER 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 BIG MESA WATER MDWCA’s next Consumer Confidence Report due?: BIG MESA WATER MDWCA’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does BIG MESA WATER MDWCA have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for BIG MESA WATER MDWCA.
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

MERKERT, BEATE

575-868-4550

CONCHAS DAM, NM 88416