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State overview
Radon in New Mexico
Of New Mexico's 33 counties and county equivalents, EPA places 7 in Zone 1, 26 in Zone 2. Zones are county-wide predictions; testing is the only way to know your home's level.
Radon in the news
New Mexico stories
- MON: New study tracks radon pollution in New Mexico oil country, + MoreKUNM · 2026-09-28
- New study tracks radon pollution in New Mexico oil country, highlights flaresSanta Fe New Mexican · 2026-09-27
- January Is a National Radon Action and Awareness Month: A Call for Action in New MexicoCibola Citizen · 2025-12-24
Headlines link to the original publishers via Google News. Updated 2026-10-27.
All 33 counties
| County | EPA zone |
|---|---|
| Bernalillo County | Zone 1 |
| Catron County | Zone 2 |
| Chaves County | Zone 2 |
| Cibola County | Zone 2 |
| Colfax County | Zone 1 |
| Curry County | Zone 2 |
| De Baca County | Zone 2 |
| Doña Ana County | Zone 2 |
| Eddy County | Zone 2 |
| Grant County | Zone 2 |
| Guadalupe County | Zone 2 |
| Harding County | Zone 2 |
| Hidalgo County | Zone 2 |
| Lea County | Zone 2 |
| Lincoln County | Zone 2 |
| Los Alamos County | Zone 2 |
| Luna County | Zone 2 |
| McKinley County | Zone 2 |
| Mora County | Zone 1 |
| Otero County | Zone 2 |
| Quay County | Zone 2 |
| Rio Arriba County | Zone 1 |
| Roosevelt County | Zone 2 |
| San Juan County | Zone 2 |
| San Miguel County | Zone 1 |
| Sandoval County | Zone 2 |
| Santa Fe County | Zone 1 |
| Sierra County | Zone 2 |
| Socorro County | Zone 2 |
| Taos County | Zone 1 |
| Torrance County | Zone 2 |
| Union County | Zone 2 |
| Valencia County | Zone 2 |
Source: EPA radon zones spreadsheet (EPA 402/A-16/001).