CONCHAS DAM, NM · San Miguel County

BIG MESA WATER MDWCA Water System

Current status

No open violations on record as of July 4, 2026.

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

Violation history

Monitoring, Regular
—
Asbestos
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
October 1, 2017 – October 31, 2017
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
October 1, 2017 – October 31, 2017
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
July 16, 2017 – January 31, 2018
Resolved
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
Public Notification Violation for NPDWR Violation
—
Public Notice
March 22, 2014 – March 28, 2014
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2013 – December 31, 2013
Resolved
Monitoring and Reporting (DBP)
—
TTHM
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, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
August 1, 2010 – August 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
May 1, 2010 – May 31, 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 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
August 1, 2009 – August 31, 2009
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
June 1, 2009 – June 30, 2009
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
June 1, 2009 – June 30, 2009
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2009 – March 31, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2009 – March 31, 2009
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
December 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
October 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
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
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 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
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
July 1, 2007 – September 30, 2007
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
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 1997 – August 31, 1997
Resolved
Monitoring, Regular
—
Mercury
July 1, 1982 – June 30, 1985
Archived
Monitoring, Regular
—
Selenium
July 1, 1982 – June 30, 1985
Archived
Monitoring, Regular
—
Arsenic
July 1, 1982 – June 30, 1985
Archived
Monitoring, Regular
—
Barium
July 1, 1982 – June 30, 1985
Archived
Monitoring, Regular
—
Cadmium
July 1, 1982 – June 30, 1985
Archived
Monitoring, Regular
—
Chromium
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, 2020 – December 31, 2022	Monitoring, Regular	Asbestos	—	Resolved
October 1, 2017 – October 31, 2017	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
October 1, 2017 – October 31, 2017	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
July 16, 2017 – January 31, 2018	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
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
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)	Total Haloacetic Acids (HAA5)	—	Resolved
October 1, 2013 – December 31, 2013	Monitoring and Reporting (DBP)	TTHM	—	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, Turbidity (Enhanced SWTR)	Interim Enhanced 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
May 1, 2010 – May 31, 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 of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
August 1, 2009 – August 31, 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
June 1, 2009 – June 30, 2009	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
January 1, 2009 – March 31, 2009	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2009 – March 31, 2009	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
December 1, 2008 – December 31, 2008	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
October 1, 2008 – October 31, 2008	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
October 1, 2008 – December 31, 2008	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2008 – December 31, 2008	Monitoring and Reporting (DBP)	Chlorine	—	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 – June 30, 2008	Maximum Contaminant Level Violation, Average	TTHM	Health-based	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
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
July 1, 2007 – September 30, 2007	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
August 1, 1997 – August 31, 1997	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 1982 – June 30, 1985	Monitoring, Regular	Mercury	—	Archived
July 1, 1982 – June 30, 1985	Monitoring, Regular	Selenium	—	Archived
July 1, 1982 – June 30, 1985	Monitoring, Regular	Arsenic	—	Archived
July 1, 1982 – June 30, 1985	Monitoring, Regular	Barium	—	Archived
July 1, 1982 – June 30, 1985	Monitoring, Regular	Cadmium	—	Archived
July 1, 1982 – June 30, 1985	Monitoring, Regular	Chromium	—	Archived

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

Enforcement actions

February 7, 2024State Violation/Reminder Notice1 linked violation
August 9, 2022State Violation/Reminder Notice2 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 Compliance achieved1 linked violation
January 31, 2018State Compliance achieved1 linked violation
January 31, 2018State Public Notification received2 linked violations
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
October 6, 2017State Compliance achieved3 linked violations
July 26, 2017State Public Notification requested3 linked violations
July 26, 2017State Violation/Reminder Notice3 linked violations
June 15, 2017State Public Notification requested2 linked violations
June 15, 2017State Compliance achieved2 linked violations
June 15, 2017State Public Notification requested2 linked violations
June 15, 2017State Violation/Reminder Notice2 linked violations
April 26, 2017State Public Notification requested3 linked violations
April 26, 2017State Violation/Reminder Notice3 linked violations
February 15, 2017State Violation/Reminder Notice2 linked violations
April 11, 2016State Public Notification requested3 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 Violation/Reminder Notice3 linked violations
March 28, 2014State Compliance achieved4 linked violations
February 21, 2014State Violation/Reminder Notice4 linked violations
August 2, 2012State Compliance achieved3 linked violations
March 9, 2012State Public Notification received36 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 requested3 linked violations
April 21, 2011State Public Notification requested2 linked violations
April 21, 2011State Public Notification requested2 linked violations
April 21, 2011State Violation/Reminder Notice8 linked violations
April 15, 2011State Public Notification requested2 linked violations
April 15, 2011State Public Notification requested2 linked violations
April 15, 2011State Violation/Reminder Notice2 linked violations
April 15, 2011State Public Notification requested2 linked violations
April 15, 2011State Violation/Reminder Notice2 linked violations
April 15, 2011State Violation/Reminder Notice2 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 Public Notification requested2 linked violations
April 15, 2011State Compliance achieved18 linked violations
April 15, 2011State Violation/Reminder Notice3 linked violations
April 15, 2011State Violation/Reminder Notice2 linked violations
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 Violation/Reminder Notice1 linked violation
April 15, 2011State Public Notification requested2 linked violations
April 15, 2011State Public Notification requested3 linked violations
April 15, 2011State Violation/Reminder Notice3 linked violations
April 8, 2011State Violation/Reminder Notice4 linked violations
April 8, 2011State Violation/Reminder Notice4 linked violations
April 8, 2011State Public Notification requested4 linked violations
October 22, 2010State Compliance achieved1 linked violation
October 22, 2010State Compliance achieved3 linked violations
October 22, 2010State Compliance achieved3 linked violations
October 22, 2010State Compliance achieved3 linked violations
October 22, 2010State Compliance achieved1 linked violation
October 22, 2010State Compliance achieved1 linked violation
September 10, 2010State Compliance achieved12 linked violations
December 22, 2008State Compliance achieved3 linked violations
January 2, 2008State Violation/Reminder Notice1 linked violation
September 10, 2007State Public Notification requested1 linked violation
March 22, 2007State Public Notification requested2 linked violations
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 Public Notification requested1 linked violation
January 11, 2007State Violation/Reminder Notice2 linked violations
September 19, 2006State Violation/Reminder Notice2 linked violations
September 19, 2006State Public Notification requested2 linked violations
August 25, 2006State Technical Assistance Visit3 linked violations
August 11, 2006State Violation/Reminder Notice4 linked violations
June 21, 2006State Technical Assistance Visit3 linked violations
July 12, 1999State Public Notification received2 linked violations
May 7, 1991State Public Notification requested3 linked violations

Contact

MERKERT, BEATE

575-868-4550

CONCHAS DAM, NM 88416