Radon in New Mexico

About 3 in 10 homes tested in New Mexico were at or above the EPA action level of 4 pCi/L.

40%31%29%

2,637 homes tested, 2008–2017

The line marks the EPA action level, 4 pCi/L.

The EPA puts 7 of New Mexico's 33 counties in Zone 1, its highest radon category, 26 in Zone 2 and 0 in Zone 3.

Every county in New Mexico

Sorted by the share of homes tested at or above 4 pCi/L. Select a county for local details and costs.

County	Homes tested	At or above 4	Median	EPA zone
Quay County	2 tests	–	–	2
Roosevelt County	1 tests	–	–	2
Union County	2 tests	–	–	2
Taos County		77%	8.5 pCi/L	1
Cibola County	9 tests	–	–	2
Rio Arriba County	12 tests	–	–	1
Grant County	12 tests	–	–	2
San Miguel County	18 tests	–	–	1
Chaves County	7 tests	–	–	2
Colfax County	10 tests	–	–	1
Luna County	4 tests	–	–	2
Los Alamos County		39%	3.0 pCi/L	2
San Juan County		34%	2.4 pCi/L	2
Santa Fe County		31%	2.7 pCi/L	1
Lincoln County	9 tests	–	–	2
McKinley County	17 tests	–	–	2
Mora County	2 tests	–	–	1
Bernalillo County		24%	2.1 pCi/L	1
Sandoval County		21%	1.5 pCi/L	2
Valencia County	19 tests	–	–	2
Lea County	11 tests	–	–	2
Torrance County	4 tests	–	–	2
Otero County	15 tests	–	–	2
Doña Ana County		13%	1.3 pCi/L	2
Eddy County	11 tests	–	–	2
Curry County		4%	0.6 pCi/L	2
Catron County	1 tests	–	–	2
Sierra County	2 tests	–	–	2
Socorro County	6 tests	–	–	2
De Baca County	No data	–	–	2
Guadalupe County	No data	–	–	2
Harding County	No data	–	–	2
Hidalgo County	No data	–	–	2

"–" means fewer than 20 tests or no lab data, too few for a reliable figure.

EPA Map of Radon Zones (public domain).
CDC Environmental Public Health Tracking Network, radon tests from labs, 2008–2017. Pre-mitigation tests only.