New Mexico Water Quality
Drinking water data for all 33 counties.
Avg Water Score
21.7
State Grade
F
Counties with Data
32
of 33 total
All New Mexico Counties
| County | Water Score |
|---|---|
| De Baca County | 86.0 |
| Los Alamos County | 86.0 |
| Chaves County | 58.1 |
| Bernalillo County | 43.4 |
| Curry County | 41.1 |
| Eddy County | 36.6 |
| Quay County | 31.3 |
| Roosevelt County | 24.8 |
| San Juan County | 24.3 |
| Luna County | 23.9 |
| Lea County | 23.0 |
| Santa Fe County | 22.7 |
| Lincoln County | 20.2 |
| Harding County | 20.0 |
| Sandoval County | 18.1 |
| Grant County | 17.9 |
| Otero County | 15.8 |
| Valencia County | 14.2 |
| McKinley County | 13.3 |
| Socorro County | 12.2 |
| Cibola County | 12.1 |
| Taos County | 10.1 |
| Sierra County | 7.4 |
| Union County | 7.0 |
| Guadalupe County | 5.3 |
| Rio Arriba County | 4.4 |
| San Miguel County | 4.0 |
| Torrance County | 3.3 |
| Mora County | 2.5 |
| Colfax County | 2.0 |
| Hidalgo County | 1.9 |
| Catron County | 1.1 |
| Doña Ana County | — |
Concerned about your water quality?
Berkey water filters remove contaminants at home.
Sponsored
Frequently Asked Questions
Which county in New Mexico has the best water quality?
De Baca County has the highest water quality score in New Mexico at 86.0/100 (Grade: A), based on EPA SDWIS data.
Which county in New Mexico has the most water violations?
Catron County has among the lowest water quality scores in New Mexico at 1.1/100. See the individual county page for detailed violation history.
Is the tap water safe to drink in New Mexico?
New Mexico has an average water quality score of 21.7/100 based on EPA Safe Drinking Water Act compliance data. Individual county scores vary — check your specific county's page for detailed information.
What contaminants are found in New Mexico water supplies?
Drinking water quality varies by county and water system. The EPA Safe Drinking Water Information System (SDWIS) tracks violations for contaminants like lead, nitrates, bacteria, and disinfection byproducts. See individual county pages for specific contaminant and violation history.
Data Source
Water quality data sourced from the EPA Safe Drinking Water Information System (SDWIS) via the ECHO enforcement database. Scores reflect compliance history and health-based violation counts.
Disclaimer: This data is informational only. It is not health, legal, or professional advice. For concerns about your specific water supply, contact your local water utility.