Tap & Air

EPA radon zones

Texas radon map: every county's zone

0 of Texas's 254 counties are EPA radon zone 1 (predicted average above 4 pCi/L), 39 are zone 2 and 215 are zone 3. High readings occur in every zone, so EPA recommends testing every home.
Anderson CountyZone 3
Andrews CountyZone 3
Angelina CountyZone 3
Aransas CountyZone 3
Archer CountyZone 3
Armstrong CountyZone 2
Atascosa CountyZone 3
Austin CountyZone 3
Bailey CountyZone 2
Bandera CountyZone 3
Bastrop CountyZone 3
Baylor CountyZone 3
Bee CountyZone 3
Bell CountyZone 3
Bexar CountyZone 3
Blanco CountyZone 3
Borden CountyZone 3
Bosque CountyZone 3
Bowie CountyZone 3
Brazoria CountyZone 3
Brazos CountyZone 3
Brewster CountyZone 2
Briscoe CountyZone 3
Brooks CountyZone 3
Brown CountyZone 3
Burleson CountyZone 3
Burnet CountyZone 3
Caldwell CountyZone 3
Calhoun CountyZone 3
Callahan CountyZone 3
Cameron CountyZone 3
Camp CountyZone 3
Carson CountyZone 2
Cass CountyZone 3
Castro CountyZone 2
Chambers CountyZone 3
Cherokee CountyZone 3
Childress CountyZone 3
Clay CountyZone 3
Cochran CountyZone 3
Coke CountyZone 3
Coleman CountyZone 3
Collin CountyZone 3
Collingsworth CountyZone 3
Colorado CountyZone 3
Comal CountyZone 3
Comanche CountyZone 3
Concho CountyZone 3
Cooke CountyZone 3
Coryell CountyZone 3
Cottle CountyZone 3
Crane CountyZone 3
Crockett CountyZone 3
Crosby CountyZone 2
Culberson CountyZone 2
Dallam CountyZone 2
Dallas CountyZone 3
Dawson CountyZone 3
Deaf Smith CountyZone 2
Delta CountyZone 3
Denton CountyZone 3
DeWitt CountyZone 3
Dickens CountyZone 3
Dimmit CountyZone 3
Donley CountyZone 2
Duval CountyZone 3
Eastland CountyZone 3
Ector CountyZone 3
Edwards CountyZone 3
El Paso CountyZone 3
Ellis CountyZone 3
Erath CountyZone 3
Falls CountyZone 3
Fannin CountyZone 3
Fayette CountyZone 3
Fisher CountyZone 3
Floyd CountyZone 2
Foard CountyZone 3
Fort Bend CountyZone 3
Franklin CountyZone 3
Freestone CountyZone 3
Frio CountyZone 3
Gaines CountyZone 3
Galveston CountyZone 3
Garza CountyZone 2
Gillespie CountyZone 3
Glasscock CountyZone 3
Goliad CountyZone 3
Gonzales CountyZone 3
Gray CountyZone 2
Grayson CountyZone 3
Gregg CountyZone 3
Grimes CountyZone 3
Guadalupe CountyZone 3
Hale CountyZone 2
Hall CountyZone 3
Hamilton CountyZone 3
Hansford CountyZone 2
Hardeman CountyZone 3
Hardin CountyZone 3
Harris CountyZone 3
Harrison CountyZone 3
Hartley CountyZone 2
Haskell CountyZone 3
Hays CountyZone 3
Hemphill CountyZone 2
Henderson CountyZone 3
Hidalgo CountyZone 3
Hill CountyZone 3
Hockley CountyZone 2
Hood CountyZone 3
Hopkins CountyZone 3
Houston CountyZone 3
Howard CountyZone 3
Hudspeth CountyZone 2
Hunt CountyZone 3
Hutchinson CountyZone 2
Irion CountyZone 3
Jack CountyZone 3
Jackson CountyZone 3
Jasper CountyZone 3
Jeff Davis CountyZone 2
Jefferson CountyZone 3
Jim Hogg CountyZone 3
Jim Wells CountyZone 3
Johnson CountyZone 3
Jones CountyZone 3
Karnes CountyZone 3
Kaufman CountyZone 3
Kendall CountyZone 3
Kenedy CountyZone 3
Kent CountyZone 3
Kerr CountyZone 3
Kimble CountyZone 3
King CountyZone 3
Kinney CountyZone 3
Kleberg CountyZone 3
Knox CountyZone 3
La Salle CountyZone 3
Lamar CountyZone 3
Lamb CountyZone 2
Lampasas CountyZone 3
Lavaca CountyZone 3
Lee CountyZone 3
Leon CountyZone 3
Liberty CountyZone 3
Limestone CountyZone 3
Lipscomb CountyZone 2
Live Oak CountyZone 3
Llano CountyZone 2
Loving CountyZone 3
Lubbock CountyZone 2
Lynn CountyZone 2
Madison CountyZone 3
Marion CountyZone 3
Martin CountyZone 3
Mason CountyZone 2
Matagorda CountyZone 3
Maverick CountyZone 3
McCulloch CountyZone 3
McLennan CountyZone 3
McMullen CountyZone 3
Medina CountyZone 3
Menard CountyZone 3
Midland CountyZone 3
Milam CountyZone 3
Mills CountyZone 3
Mitchell CountyZone 3
Montague CountyZone 3
Montgomery CountyZone 3
Moore CountyZone 2
Morris CountyZone 3
Motley CountyZone 3
Nacogdoches CountyZone 3
Navarro CountyZone 3
Newton CountyZone 3
Nolan CountyZone 3
Nueces CountyZone 3
Ochiltree CountyZone 2
Oldham CountyZone 2
Orange CountyZone 3
Palo Pinto CountyZone 3
Panola CountyZone 3
Parker CountyZone 3
Parmer CountyZone 2
Pecos CountyZone 3
Polk CountyZone 3
Potter CountyZone 2
Presidio CountyZone 2
Rains CountyZone 3
Randall CountyZone 2
Reagan CountyZone 3
Real CountyZone 3
Red River CountyZone 3
Reeves CountyZone 2
Refugio CountyZone 3
Roberts CountyZone 2
Robertson CountyZone 3
Rockwall CountyZone 3
Runnels CountyZone 3
Rusk CountyZone 3
Sabine CountyZone 3
San Augustine CountyZone 3
San Jacinto CountyZone 3
San Patricio CountyZone 3
San Saba CountyZone 3
Schleicher CountyZone 3
Scurry CountyZone 3
Shackelford CountyZone 3
Shelby CountyZone 3
Sherman CountyZone 2
Smith CountyZone 3
Somervell CountyZone 3
Starr CountyZone 3
Stephens CountyZone 3
Sterling CountyZone 3
Stonewall CountyZone 3
Sutton CountyZone 3
Swisher CountyZone 2
Tarrant CountyZone 3
Taylor CountyZone 3
Terrell CountyZone 2
Terry CountyZone 3
Throckmorton CountyZone 3
Titus CountyZone 3
Tom Green CountyZone 3
Travis CountyZone 3
Trinity CountyZone 3
Tyler CountyZone 3
Upshur CountyZone 3
Upton CountyZone 3
Uvalde CountyZone 3
Val Verde CountyZone 3
Van Zandt CountyZone 3
Victoria CountyZone 3
Walker CountyZone 3
Waller CountyZone 3
Ward CountyZone 3
Washington CountyZone 3
Webb CountyZone 3
Wharton CountyZone 3
Wheeler CountyZone 3
Wichita CountyZone 3
Wilbarger CountyZone 3
Willacy CountyZone 3
Williamson CountyZone 3
Wilson CountyZone 3
Winkler CountyZone 3
Wise CountyZone 3
Wood CountyZone 3
Yoakum CountyZone 3
Young CountyZone 3
Zapata CountyZone 3
Zavala CountyZone 3

How much does radon mitigation cost?

Most single-family systems cost $800 to $2,500 installed, depending on foundation type and how many suction points are needed. A follow-up test confirms the system works.

What do the zones mean?

EPA radon zones describe counties, not houses. Zone 1 counties have a predicted average indoor level above 4 picocuries per liter (pCi/L), Zone 2 between 2 and 4, Zone 3 below 2. Homes with high levels are found in every zone, which is why EPA recommends that every home be tested, and fixed at 4 pCi/L or above.

Texas cities: water and radon

Source: EPA Map of Radon Zones.