REGINA MDWCA
New Mexico — Community Water System — PWSID: NM3509523
System Information
| PWSID | NM3509523 |
| System Name | REGINA 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 | Mar 12, 1980 |
| Last Reported | Dec 3, 2025 |
Location & Contact
| State | New Mexico |
| City | LOS ALAMOS |
| ZIP Code | 87544 |
| Address | — |
| Organization | GROFFMAN, ARMOND |
| Phone | 505-663-1466 |
Population & Service
| Population Served | 705 |
| Service Connections | 260 |
Drinking Water Violations (302)
This water system has 302 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2025 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Unaddressed | — | Consumer Confidence Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Apr 8, 2025 | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Unaddressed | — | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Unaddressed | — | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Unaddressed | — | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Unaddressed | — | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Unaddressed | — | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Unaddressed | — | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Apr 8, 2025 | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Apr 8, 2025 | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Apr 8, 2025 | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Unaddressed | — | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Apr 8, 2025 | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Apr 8, 2025 | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Apr 8, 2025 | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Unaddressed | — | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Apr 8, 2025 | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Unaddressed | — | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Unaddressed | — | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Unaddressed | — | Ground Water Rule |
| Oct 11, 2024 | — | Groundwater Rule | TT | Yes | No | — | — | — | Unaddressed | — | Ground Water Rule |
| Aug 16, 2024 | — | Public Notice | Other | No | No | — | — | — | Resolved | Feb 5, 2025 | Public Notice Rule and Revised PN Rule |
| Aug 16, 2024 | — | Public Notice | Other | No | No | — | — | — | Resolved | Feb 5, 2025 | Public Notice Rule and Revised PN Rule |
| Jul 16, 2024 | — | Groundwater Rule | Other | No | No | — | — | — | Resolved | Apr 8, 2025 | Ground Water Rule |
| Jul 16, 2024 | — | Groundwater Rule | Other | No | No | — | — | — | Resolved | Apr 8, 2025 | Ground Water Rule |
| Jul 16, 2024 | — | Groundwater Rule | Other | No | No | — | — | — | Resolved | Apr 8, 2025 | Ground Water Rule |
| Oct 1, 2023 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Mar 19, 2024 | Consumer Confidence Rule |
| Oct 1, 2023 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Mar 19, 2024 | Consumer Confidence Rule |
| Jul 1, 2023 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Oct 24, 2023 | Consumer Confidence Rule |
| Jul 1, 2023 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Oct 24, 2023 | Consumer Confidence Rule |
| Mar 21, 2021 | — | Public Notice | Other | No | No | — | — | — | Resolved | Dec 9, 2021 | Public Notice Rule and Revised PN Rule |
| Jan 1, 2020 | Dec 31, 2022 | Asbestos | MR | No | Yes | — | 7 MFL | — | Resolved | Dec 31, 2022 | Inorganic Chemicals |
| Jan 1, 2020 | Dec 31, 2022 | Asbestos | MR | No | Yes | — | 7 MFL | — | Resolved | Dec 31, 2022 | Inorganic Chemicals |
| Jan 1, 2020 | Dec 31, 2022 | Asbestos | MR | No | Yes | — | 7 MFL | — | Resolved | Dec 31, 2022 | Inorganic Chemicals |
| Oct 1, 2019 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Sep 30, 2020 | Consumer Confidence Rule |
| Oct 1, 2019 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Sep 30, 2020 | Consumer Confidence Rule |
| Jul 1, 2019 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 7, 2020 | Consumer Confidence Rule |
| Jul 1, 2019 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 7, 2020 | Consumer Confidence Rule |
| Oct 1, 2018 | Sep 30, 2019 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2019 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2018 | Sep 30, 2019 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2019 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2018 | Sep 30, 2019 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2019 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2018 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Feb 19, 2019 | Consumer Confidence Rule |
| Oct 1, 2018 | Sep 30, 2019 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2019 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2018 | Sep 30, 2019 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2019 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2018 | Sep 30, 2019 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2019 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2018 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Feb 19, 2019 | Consumer Confidence Rule |
| Jul 1, 2018 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Dec 27, 2018 | Consumer Confidence Rule |
| Jul 1, 2018 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Dec 27, 2018 | Consumer Confidence Rule |
| Jun 15, 2018 | — | Public Notice | Other | No | No | — | — | — | Resolved | Mar 28, 2019 | Public Notice Rule and Revised PN Rule |
| Jun 15, 2018 | — | Public Notice | Other | No | No | — | — | — | Resolved | Mar 28, 2019 | Public Notice Rule and Revised PN Rule |
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.