Radon by ZIP

Radon zones in Oklahoma

Last updated

EPA’s Map of Radon Zones places 77 Oklahoma counties in its three radon potential zones: 0 in Zone 1 (highest), 9 in Zone 2 (moderate), and 68 in Zone 3 (low).

0Zone 1 · Highest potential
9Zone 2 · Moderate potential
68Zone 3 · Low potential

What this means for Oklahoma homes

Most Oklahoma counties fall in Zone 3. EPA predicts lower average indoor levels (below 2 pCi/L) across much of Oklahoma. That does not mean your home is low: EPA notes that elevated levels are found in Zone 3 counties too.

EPA’s guidance is the same everywhere: test your home, fix it if the level is 4 pCi/L or higher, and consider fixing between 2 and 4 pCi/L. The zone map is from 1993 and should not be used to decide whether a single home needs testing.

Oklahoma radon program

EPA lists the following state contact for Oklahoma: OK Department of Environmental Quality, Land Protection Division, Radiation Management Section, phone 405-702-5100. Website: oklahoma.gov/deq/divisions/land-protection/radiation/radon.html. State programs can tell you about local testing data, free or discounted test kits, disclosure rules for home sales, and credentialed radon professionals.

Oklahoma counties and their EPA radon zones

CountyEPA radon zone
Adair CountyZone 2
Alfalfa CountyZone 3
Atoka CountyZone 3
Beaver CountyZone 2
Beckham CountyZone 3
Blaine CountyZone 3
Bryan CountyZone 3
Caddo CountyZone 3
Canadian CountyZone 3
Carter CountyZone 3
Cherokee CountyZone 2
Choctaw CountyZone 3
Cimarron CountyZone 2
Cleveland CountyZone 3
Coal CountyZone 3
Comanche CountyZone 3
Cotton CountyZone 3
Craig CountyZone 3
Creek CountyZone 3
Custer CountyZone 3
Delaware CountyZone 2
Dewey CountyZone 3
Ellis CountyZone 2
Garfield CountyZone 3
Garvin CountyZone 3
Grady CountyZone 3
Grant CountyZone 3
Greer CountyZone 3
Harmon CountyZone 3
Harper CountyZone 3
Haskell CountyZone 3
Hughes CountyZone 3
Jackson CountyZone 3
Jefferson CountyZone 3
Johnston CountyZone 3
Kay CountyZone 3
Kingfisher CountyZone 3
Kiowa CountyZone 3
Latimer CountyZone 3
Le Flore CountyZone 3
Lincoln CountyZone 3
Logan CountyZone 3
Love CountyZone 3
Major CountyZone 3
Marshall CountyZone 3
Mayes CountyZone 2
McClain CountyZone 3
McCurtain CountyZone 3
McIntosh CountyZone 3
Murray CountyZone 3
Muskogee CountyZone 3
Noble CountyZone 3
Nowata CountyZone 3
Okfuskee CountyZone 3
Oklahoma CountyZone 3
Okmulgee CountyZone 3
Osage CountyZone 3
Ottawa CountyZone 3
Pawnee CountyZone 3
Payne CountyZone 3
Pittsburg CountyZone 3
Pontotoc CountyZone 3
Pottawatomie CountyZone 3
Pushmataha CountyZone 3
Roger Mills CountyZone 3
Rogers CountyZone 3
Seminole CountyZone 3
Sequoyah CountyZone 2
Stephens CountyZone 3
Texas CountyZone 2
Tillman CountyZone 3
Tulsa CountyZone 3
Wagoner CountyZone 3
Washington CountyZone 3
Washita CountyZone 3
Woods CountyZone 3
Woodward CountyZone 3

County names follow the 2020 Census. Zones from the EPA Map of Radon Zones (text version). Rows marked “zone of” use the zone EPA gave the predecessor or surrounding county.

Next steps: read how to test your home, check a result with the level calculator, or look up a single address by ZIP code.

Sources

  1. U.S. EPA, EPA Map of Radon Zones (text version)
  2. U.S. EPA, EPA Map of Radon Zones and Supplemental Information (state radon contacts)
  3. U.S. EPA, EPA Maps of Radon Zones and Supporting Documents by State