EPA Zone Data 2026
Texas Radon Map, Levels & Testing Guide
View EPA radon zone classifications for every county in Texas. Open your county to compare basement test meaning, EPA action thresholds, and when mitigation pricing becomes worth checking.
0
Zone 1
High Risk
High Risk
39
Zone 2
Moderate
Moderate
215
Zone 3
Low Risk
Low Risk
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Browse Counties
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Open your county to see its EPA zone, testing meaning, and the point where mitigation becomes worth pricing.
Armstrong County
Zone 2
Bailey County
Zone 2
Brewster County
Zone 2
Carson County
Zone 2
Castro County
Zone 2
Crosby County
Zone 2
Culberson County
Zone 2
Dallam County
Zone 2
Deaf Smith County
Zone 2
Donley County
Zone 2
Floyd County
Zone 2
Garza County
Zone 2
Gray County
Zone 2
Hale County
Zone 2
Hansford County
Zone 2
Hartley County
Zone 2
Hemphill County
Zone 2
Hockley County
Zone 2
Hudspeth County
Zone 2
Hutchinson County
Zone 2
Jeff Davis County
Zone 2
Lamb County
Zone 2
Lipscomb County
Zone 2
Llano County
Zone 2
Lubbock County
Zone 2
Lynn County
Zone 2
Mason County
Zone 2
Moore County
Zone 2
Ochiltree County
Zone 2
Oldham County
Zone 2
Parmer County
Zone 2
Potter County
Zone 2
Presidio County
Zone 2
Randall County
Zone 2
Reeves County
Zone 2
Roberts County
Zone 2
Sherman County
Zone 2
Swisher County
Zone 2
Terrell County
Zone 2
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