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Counties with the Highest Radon Potential in New Mexico

The top 25 of 32 New Mexico counties on GIS Map, ranked by EPA radon zone, where zone 1 carries the highest predicted indoor radon potential and zone 3 the lowest.

#CountyEPA radon zone
1Catron County
2
2Chaves County
2
3Cibola County
2
4Curry County
2
5De Baca County
2
6Eddy County
2
7Grant County
2
8Guadalupe County
2
9Harding County
2
10Hidalgo County
2
11Lea County
2
12Lincoln County
2
13Los Alamos County
2
14Luna County
2
15McKinley County
2
16Otero County
2
17Quay County
2
18Roosevelt County
2
19San Juan County
2
20Sandoval County
2
21Sierra County
2
22Socorro County
2
23Torrance County
2
24Union County
2
25Valencia County
2

Source: EPA Map of Radon Zones (September 2025). All counties with data are ranked. Estimates carry margins of error.

Citing this page: GIS Map, “Counties with the Highest Radon Potential in New Mexico”, https://gismap.land/rankings/new-mexico/highest-radon-counties. Figures from EPA Map of Radon Zones (September 2025).

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