LOS ALAMOS, NM · Los Alamos County
LOS ALAMOS MUNICIPAL WATER SYSTEM Water System
Consumer Confidence Report status
LOS ALAMOS MUNICIPAL WATER SYSTEM 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 LOS ALAMOS MUNICIPAL WATER SYSTEM.
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)
- NM3500115
- System type
- Community Water System
- Population served
- 25,000
- Service connections
- 7,000
- Ownership
- local government
- Water source
- groundwater (wells)
LOS ALAMOS MUNICIPAL WATER SYSTEM is among the 12 largest community water systems in New Mexico, serving 25,000 people from groundwater.
As of August 1, 2026, its federal record holds 13 entries between 1980 and 2016, all of which EPA lists as closed. Nothing has been added since 2016.
Of the 13, 10 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 Stage 2 Disinfectants and Disinfection Byproducts Rule, the Consumer Confidence Rule, and the Public Notice Rule and Revised PN Rule.
Violation history
Public Notification Violation for NPDWR Violation
—Public Notice
February 1, 2016 – February 3, 2016
ResolvedFollow-up Or Routine LCR Tap M/R
—Lead and Copper Rule
October 1, 2014 – June 10, 2015
ResolvedMonitoring and Reporting (DBP)
—TTHM
October 1, 2014 – December 31, 2014
ResolvedMonitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
October 1, 2014 – December 31, 2014
ResolvedConsumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2014 – August 28, 2014
ResolvedMonitoring and Reporting (DBP)
—TTHM
July 1, 2014 – September 30, 2014
ResolvedMonitoring and Reporting (DBP)
—TTHM
April 1, 2014 – June 30, 2014
ResolvedMonitoring and Reporting (DBP)
—TTHM
January 1, 2014 – March 31, 2014
ResolvedMonitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
January 1, 2014 – March 31, 2014
ResolvedMonitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
October 1, 2013 – December 31, 2013
ResolvedMonitoring and Reporting (DBP)
—TTHM
October 1, 2013 – December 31, 2013
ResolvedConsumer Confidence Report Inadequate Reporting
—Consumer Confidence Rule
October 1, 2011 – October 26, 2011
ResolvedMonitoring, Regular
—Fluoride
July 1, 1980 – June 30, 1983
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 |
|---|---|---|---|---|
| February 1, 2016 – February 3, 2016 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
| October 1, 2014 – June 10, 2015 | Follow-up Or Routine LCR Tap M/R | Lead and Copper Rule | — | Resolved |
| October 1, 2014 – December 31, 2014 | Monitoring and Reporting (DBP) | TTHM | — | Resolved |
| October 1, 2014 – December 31, 2014 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Resolved |
| July 1, 2014 – August 28, 2014 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
| July 1, 2014 – September 30, 2014 | Monitoring and Reporting (DBP) | TTHM | — | Resolved |
| April 1, 2014 – June 30, 2014 | Monitoring and Reporting (DBP) | TTHM | — | Resolved |
| January 1, 2014 – March 31, 2014 | Monitoring and Reporting (DBP) | TTHM | — | Resolved |
| January 1, 2014 – March 31, 2014 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | 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 |
| October 1, 2011 – October 26, 2011 | Consumer Confidence Report Inadequate Reporting | Consumer Confidence Rule | — | Resolved |
| July 1, 1980 – June 30, 1983 | Monitoring, Regular | Fluoride | — | Archived |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- February 12, 2015State Violation/Reminder Notice3 linked violations
- May 17, 2012State Public Notification requested4 linked violations
Common questions
Is LOS ALAMOS MUNICIPAL WATER SYSTEM required to publish a Consumer Confidence Report?
- Yes. LOS ALAMOS MUNICIPAL WATER SYSTEM 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 LOS ALAMOS MUNICIPAL WATER SYSTEM’s next Consumer Confidence Report due?
- LOS ALAMOS MUNICIPAL WATER SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does LOS ALAMOS MUNICIPAL WATER SYSTEM have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for LOS ALAMOS MUNICIPAL WATER SYSTEM.
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
GOMEZ, DAVID
505-662-8157
LOS ALAMOS, NM 87544