LOS ALAMOS, NM · Sandoval County

REGINA MDWCA Water System

Current status

1 open health-based violation on record as of July 4, 2026. 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): NM3509523
System type: Community Water System
Population served: 705
Service connections: 260
Ownership: local government
Water source: groundwater (wells)

Violation history

Failure To Address Deficiency
Health-based
Groundwater Rule
October 11, 2024
Unaddressed
Failure To Address Deficiency
Health-based
Groundwater Rule
October 11, 2024 – April 8, 2025
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
May 9, 2018 – March 28, 2019
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
April 13, 2018 – March 28, 2019
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
February 4, 2018 – February 27, 2018
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
November 29, 2017 – November 13, 2020
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2017 – February 19, 2019
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2017 – September 26, 2017
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
April 1, 2017 – April 30, 2017
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
March 1, 2017 – March 31, 2017
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
February 1, 2017 – February 28, 2017
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2016 – September 26, 2018
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
October 1, 2016 – October 31, 2016
Resolved
Monitoring and Reporting (DBP)
—
TTHM
October 1, 2016 – September 30, 2017
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2016 – September 30, 2017
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2016 – July 31, 2016
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2015 – September 30, 2016
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
April 19, 2015 – July 31, 2017
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
April 19, 2015 – July 30, 2018
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
April 19, 2015 – July 30, 2018
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
April 19, 2015 – July 31, 2018
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
April 19, 2015 – December 15, 2017
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
January 22, 2015 – July 31, 2017
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
January 22, 2015 – July 30, 2018
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
January 22, 2015 – August 2, 2017
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
January 22, 2015 – July 31, 2017
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
January 22, 2015 – December 15, 2017
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2014 – September 30, 2014
Resolved
Operations Report
—
No contaminant on record
January 11, 2006 – August 10, 2006
Resolved
Operations Report
—
No contaminant on record
April 11, 2005 – August 10, 2006
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2005 – December 31, 2005
Resolved
Operations Report
—
No contaminant on record
October 11, 2004 – August 10, 2006
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2001 – September 30, 2001
Resolved

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

Period	Violation	Contaminant / rule	Health-based	Status
October 11, 2024	Failure To Address Deficiency	Groundwater Rule	Health-based	Unaddressed
October 11, 2024 – April 8, 2025	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
May 9, 2018 – March 28, 2019	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
April 13, 2018 – March 28, 2019	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
February 4, 2018 – February 27, 2018	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
November 29, 2017 – November 13, 2020	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
October 1, 2017 – February 19, 2019	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2017 – September 26, 2017	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
April 1, 2017 – April 30, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
March 1, 2017 – March 31, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
February 1, 2017 – February 28, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2016 – September 26, 2018	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
October 1, 2016 – October 31, 2016	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2016 – September 30, 2017	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2016 – September 30, 2017	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2016 – July 31, 2016	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2015 – September 30, 2016	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
April 19, 2015 – July 31, 2017	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
April 19, 2015 – July 30, 2018	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
April 19, 2015 – July 30, 2018	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
April 19, 2015 – July 31, 2018	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
April 19, 2015 – December 15, 2017	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
January 22, 2015 – July 31, 2017	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
January 22, 2015 – July 30, 2018	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
January 22, 2015 – August 2, 2017	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
January 22, 2015 – July 31, 2017	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
January 22, 2015 – December 15, 2017	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
January 1, 2014 – September 30, 2014	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 11, 2006 – August 10, 2006	Operations Report	—	—	Resolved
April 11, 2005 – August 10, 2006	Operations Report	—	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
October 11, 2004 – August 10, 2006	Operations Report	—	—	Resolved
September 1, 2001 – September 30, 2001	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved

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

Enforcement actions

August 10, 2006State Compliance Meeting conducted26 linked violations
August 10, 2006State Compliance achieved6 linked violations
August 10, 2006State Compliance achieved14 linked violations
September 17, 2004State Public Notification received5 linked violations
October 8, 2003State Public Notification received35 linked violations

Contact

GROFFMAN, ARMOND

505-663-1466

LOS ALAMOS, NM 87544