SAN MATEO MDWCA
New Mexico - Community Water System - PWSID: NM3525733
System Information
| PWSID | NM3525733 |
| System Name | SAN MATEO MDWCA |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 06 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Oct 21, 1981 |
| Last Reported | Mar 31, 2026 |
Location & Contact
| State | New Mexico |
| City | MILAN |
| ZIP Code | 87021 |
| Address | - |
| Organization | ORTEGA, LLOYD |
| Phone | 505-287-8108 |
Population & Service
| Population Served | 182 |
| Service Connections | 55 |
Drinking Water Violations (137)
This water system has 137 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 1, 2025 | - | MR | No | No | - | TT | - | Unaddressed | - | - | |
| Jul 1, 2025 | - | Other | No | No | - | - | - | Resolved | Sep 19, 2025 | - | |
| Jul 1, 2025 | - | Other | No | No | - | - | - | Resolved | Sep 19, 2025 | - | |
| Oct 1, 2024 | - | Other | No | No | - | - | - | Resolved | Oct 7, 2024 | - | |
| Oct 1, 2024 | - | Other | No | No | - | - | - | Resolved | Oct 7, 2024 | - | |
| Jul 1, 2024 | - | Other | No | No | - | - | - | Resolved | Oct 3, 2024 | - | |
| Jul 1, 2024 | - | Other | No | No | - | - | - | Resolved | Oct 3, 2024 | - | |
| Nov 24, 2023 | - | MR | No | Yes | - | - | - | Resolved | Nov 27, 2023 | - | |
| Nov 24, 2023 | - | MR | No | Yes | - | - | - | Resolved | Nov 27, 2023 | - | |
| Nov 24, 2023 | - | MR | No | Yes | - | - | - | Resolved | Nov 27, 2023 | - | |
| Jun 15, 2023 | - | TT | Yes | No | - | - | - | Resolved | Oct 13, 2023 | - | |
| Oct 1, 2021 | - | MR | No | No | - | TT | - | Resolved | Jul 27, 2022 | - | |
| Oct 1, 2021 | - | MR | No | No | - | TT | - | Resolved | Jul 27, 2022 | - | |
| Oct 1, 2021 | - | MR | No | No | - | TT | - | Resolved | Jul 27, 2022 | - | |
| Oct 1, 2021 | - | MR | No | No | - | TT | - | Resolved | Jul 27, 2022 | - | |
| Oct 1, 2021 | - | Other | No | No | - | - | - | Resolved | Oct 26, 2021 | - | |
| Oct 1, 2021 | - | Other | No | No | - | - | - | Resolved | Oct 26, 2021 | - | |
| Dec 20, 2019 | - | Other | No | No | - | - | - | Resolved | May 22, 2020 | - | |
| Oct 1, 2018 | - | Other | No | No | - | - | - | Resolved | Nov 19, 2018 | - | |
| Oct 1, 2018 | - | Other | No | No | - | - | - | Resolved | Nov 19, 2018 | - | |
| Sep 21, 2018 | - | TT | Yes | No | - | - | - | Resolved | Nov 19, 2018 | - | |
| Sep 21, 2018 | - | TT | Yes | No | - | - | - | Resolved | Nov 19, 2018 | - | |
| Sep 21, 2018 | - | TT | Yes | No | - | - | - | Resolved | Nov 19, 2018 | - | |
| Sep 21, 2018 | - | TT | Yes | No | - | - | - | Resolved | Nov 19, 2018 | - | |
| Sep 21, 2018 | - | TT | Yes | No | - | - | - | Resolved | May 7, 2019 | - | |
| Sep 21, 2018 | - | TT | Yes | No | - | - | - | Resolved | May 7, 2019 | - | |
| Sep 21, 2018 | - | TT | Yes | No | - | - | - | Resolved | May 7, 2019 | - | |
| Sep 21, 2018 | - | TT | Yes | No | - | - | - | Resolved | May 7, 2019 | - | |
| Oct 1, 2017 | - | Other | No | No | - | - | - | Resolved | Feb 13, 2018 | - | |
| Jun 18, 2017 | - | Other | No | No | - | - | - | Resolved | May 27, 2020 | - | |
| Jun 2, 2016 | - | Other | No | No | - | - | - | Resolved | Aug 3, 2016 | - | |
| Jun 2, 2016 | - | Other | No | No | - | - | - | Resolved | Aug 3, 2016 | - | |
| Jun 2, 2016 | - | Other | No | No | - | - | - | Resolved | Aug 3, 2016 | - | |
| Jun 2, 2016 | - | Other | No | No | - | - | - | Resolved | Aug 3, 2016 | - | |
| Apr 25, 2016 | - | TT | Yes | No | - | - | - | Unaddressed | - | - | |
| Apr 25, 2016 | - | TT | Yes | No | - | - | - | Unaddressed | - | - | |
| Sep 1, 2015 | Sep 30, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2015 | - | |
| Sep 1, 2015 | Sep 30, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2015 | - | |
| Sep 1, 2015 | Sep 30, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2015 | - | |
| Sep 1, 2015 | Sep 30, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2015 | - | |
| Apr 1, 2003 | Apr 30, 2003 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2003 | - | |
| Apr 1, 2003 | Apr 30, 2003 | Other | No | No | - | 5% of samples | - | Resolved | Oct 31, 2002 | - | |
| Apr 1, 2003 | Apr 30, 2003 | Other | No | No | - | 5% of samples | - | Resolved | Aug 31, 2002 | - | |
| Apr 1, 2003 | Apr 30, 2003 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2003 | - | |
| Apr 1, 2003 | Apr 30, 2003 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2003 | - | |
| Oct 1, 2002 | Oct 31, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2001 | - | |
| Oct 1, 2002 | Oct 31, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2001 | - | |
| Oct 1, 2002 | Oct 31, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2001 | - | |
| Oct 1, 2002 | Oct 31, 2002 | Other | No | No | - | 5% of samples | - | Resolved | Dec 31, 2001 | - | |
| Oct 1, 2002 | Oct 31, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2001 | - |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.