MILAN, NM · Cibola County
SAN MATEO MDWCA Water System
Consumer Confidence Report status
SAN MATEO 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 items for SAN MATEO MDWCA that are open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.
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)
- NM3525733
- System type
- Community Water System
- Population served
- 182
- Service connections
- 55
- Ownership
- local government
- Water source
- groundwater (wells)
SAN MATEO MDWCA is one of 667 community water systems in New Mexico in the 500 or fewer people size category, serving 182 people from groundwater.
As of August 1, 2026, its federal record holds 11 entries between 1984 and 2025, of which 2 remain open; none are health-based.
Of the 11, 1 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 Consumer Confidence Rule, the Groundwater Rule, and the Total Coliform Rules.
Violation history
Follow-up Or Routine LCR Tap M/R
—Lead and Copper Rule
October 1, 2025
UnaddressedConsumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2025 – September 19, 2025
ResolvedPublic Notification Violation for NPDWR Violation
—Public Notice
December 20, 2024
UnaddressedConsumer Confidence Report Inadequate Reporting
—Consumer Confidence Rule
October 1, 2024 – October 7, 2024
ResolvedFailure To Address Deficiency
Health-basedGroundwater Rule
June 15, 2023 – October 13, 2023
ResolvedConsumer Confidence Report Inadequate Reporting
—Consumer Confidence Rule
October 1, 2021 – October 26, 2021
ResolvedFailure To Address Deficiency
Health-basedGroundwater Rule
September 21, 2018 – November 19, 2018
ResolvedConsumer Confidence Report Inadequate Reporting
—Consumer Confidence Rule
October 1, 2017 – February 13, 2018
ResolvedSample Siting Plan Errors (RTCR)
—Revised Total Coliform Rule
June 2, 2016 – August 3, 2016
ResolvedMaximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
August 1, 2001 – August 31, 2001
ResolvedMaximum Contaminant Level Violation, Average
Health-basedFluoride
July 1, 1984 – June 30, 1987
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 |
|---|---|---|---|---|
| October 1, 2025 | Follow-up Or Routine LCR Tap M/R | Lead and Copper Rule | — | Unaddressed |
| July 1, 2025 – September 19, 2025 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
| December 20, 2024 | Public Notification Violation for NPDWR Violation | Public Notice | — | Unaddressed |
| October 1, 2024 – October 7, 2024 | Consumer Confidence Report Inadequate Reporting | Consumer Confidence Rule | — | Resolved |
| June 15, 2023 – October 13, 2023 | Failure To Address Deficiency | Groundwater Rule | Health-based | Resolved |
| October 1, 2021 – October 26, 2021 | Consumer Confidence Report Inadequate Reporting | Consumer Confidence Rule | — | Resolved |
| September 21, 2018 – November 19, 2018 | Failure To Address Deficiency | Groundwater Rule | Health-based | Resolved |
| October 1, 2017 – February 13, 2018 | Consumer Confidence Report Inadequate Reporting | Consumer Confidence Rule | — | Resolved |
| June 2, 2016 – August 3, 2016 | Sample Siting Plan Errors (RTCR) | Revised Total Coliform Rule | — | Resolved |
| August 1, 2001 – August 31, 2001 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Resolved |
| July 1, 1984 – June 30, 1987 | Maximum Contaminant Level Violation, Average | Fluoride | Health-based | 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
- June 9, 2003State Violation/Reminder Notice2 linked violations
- August 13, 1991State Violation/Reminder Notice4 linked violations
Common questions
Is SAN MATEO MDWCA required to publish a Consumer Confidence Report?
- Yes. SAN MATEO 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 SAN MATEO MDWCA’s next Consumer Confidence Report due?
- SAN MATEO MDWCA’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does SAN MATEO MDWCA have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show 2 items for SAN MATEO MDWCA that are open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.
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
ORTEGA, LLOYD
505-287-8108
MILAN, NM 87021