New Mexico water quality by county
33 counties with public water systems. Pick a county to see every system that serves it.
| County | Active systems | People served | Share with violations, 3 yr | Serious violators | Health flags |
|---|---|---|---|---|---|
| Bernalillo County | 83 | 651,881 | 7 | 13 | |
| Catron County | 15 | 2,334 | 2 | 2 | |
| Chaves County | 15 | 64,098 | 2 | 3 | |
| Cibola County | 18 | 19,265 | 3 | 9 | |
| Colfax County | 52 | 25,433 | 1 | 4 | |
| Curry County | 16 | 53,710 | 0 | 2 | |
| De Baca County | 4 | 2,293 | 0 | 2 | |
| Doña Ana County | 68 | 257,017 | 3 | 4 | |
| Eddy County | 28 | 67,133 | 1 | 2 | |
| Grant County | 28 | 27,338 | 2 | 5 | |
| Guadalupe County | 11 | 5,937 | 0 | 7 | |
| Harding County | 2 | 758 | 0 | 1 | |
| Hidalgo County | 9 | 4,361 | 0 | 1 | |
| Lea County | 23 | 66,976 | 1 | 5 | |
| Lincoln County | 53 | 35,961 | 1 | 5 | |
| Los Alamos County | 2 | 25,350 | 0 | 0 | |
| Luna County | 14 | 20,096 | 2 | 6 | |
| McKinley County | 27 | 33,611 | 1 | 8 | |
| Mora County | 20 | 4,236 | 0 | 4 | |
| Otero County | 56 | 71,071 | 2 | 8 | |
| Quay County | 10 | 10,646 | 0 | 2 | |
| Rio Arriba County | 62 | 29,214 | 5 | 22 | |
| Roosevelt County | 8 | 18,677 | 0 | 1 | |
| San Juan County | 22 | 104,788 | 1 | 5 | |
| San Miguel County | 43 | 23,659 | 2 | 9 | |
| Sandoval County | 61 | 136,121 | 3 | 16 | |
| Santa Fe County | 84 | 155,287 | 7 | 23 | |
| Sierra County | 21 | 11,558 | 0 | 3 | |
| Socorro County | 18 | 19,579 | 0 | 4 | |
| Taos County | 95 | 25,146 | 5 | 13 | |
| Torrance County | 27 | 10,502 | 4 | 8 | |
| Union County | 8 | 4,699 | 0 | 0 | |
| Valencia County | 30 | 52,098 | 5 | 7 |
under 30% 30 to 59% 60% and over
About this data
Share with violations counts any violation in the past three years, including monitoring and reporting lapses. Counts cover active systems; systems serving more than one county are counted in each.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The New Mexico records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.