Radon by ZIP

Radon zones in North Carolina

Last updated

EPA’s Map of Radon Zones places 100 North Carolina counties in its three radon potential zones: 8 in Zone 1 (highest), 31 in Zone 2 (moderate), and 61 in Zone 3 (low).

8Zone 1 · Highest potential
31Zone 2 · Moderate potential
61Zone 3 · Low potential

What this means for North Carolina homes

Most North Carolina counties fall in Zone 3. EPA predicts lower average indoor levels (below 2 pCi/L) across much of North Carolina. 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.

North Carolina radon program

EPA lists the following state contact for North Carolina: NC NC Department of Health and Human Services, Radon Program, phone 828-712-0972. Website: www.ncdhhs.gov/divisions/health-service-regulation/north-carolina-radon-program. State programs can tell you about local testing data, free or discounted test kits, disclosure rules for home sales, and credentialed radon professionals.

North Carolina counties and their EPA radon zones

CountyEPA radon zone
Alamance CountyZone 3
Alexander CountyZone 2
Alleghany CountyZone 1
Anson CountyZone 3
Ashe CountyZone 2
Avery CountyZone 2
Beaufort CountyZone 3
Bertie CountyZone 3
Bladen CountyZone 3
Brunswick CountyZone 3
Buncombe CountyZone 1
Burke CountyZone 2
Cabarrus CountyZone 3
Caldwell CountyZone 2
Camden CountyZone 3
Carteret CountyZone 3
Caswell CountyZone 2
Catawba CountyZone 2
Chatham CountyZone 3
Cherokee CountyZone 1
Chowan CountyZone 3
Clay CountyZone 2
Cleveland CountyZone 2
Columbus CountyZone 3
Craven CountyZone 3
Cumberland CountyZone 3
Currituck CountyZone 3
Dare CountyZone 3
Davidson CountyZone 3
Davie CountyZone 3
Duplin CountyZone 3
Durham CountyZone 3
Edgecombe CountyZone 3
Forsyth CountyZone 2
Franklin CountyZone 2
Gaston CountyZone 2
Gates CountyZone 3
Graham CountyZone 2
Granville CountyZone 3
Greene CountyZone 3
Guilford CountyZone 3
Halifax CountyZone 3
Harnett CountyZone 3
Haywood CountyZone 2
Henderson CountyZone 1
Hertford CountyZone 3
Hoke CountyZone 3
Hyde CountyZone 3
Iredell CountyZone 2
Jackson CountyZone 2
Johnston CountyZone 3
Jones CountyZone 3
Lee CountyZone 3
Lenoir CountyZone 3
Lincoln CountyZone 2
Macon CountyZone 2
Madison CountyZone 2
Martin CountyZone 3
McDowell CountyZone 2
Mecklenburg CountyZone 3
Mitchell CountyZone 1
Montgomery CountyZone 3
Moore CountyZone 3
Nash CountyZone 3
New Hanover CountyZone 3
Northampton CountyZone 3
Onslow CountyZone 3
Orange CountyZone 3
Pamlico CountyZone 3
Pasquotank CountyZone 3
Pender CountyZone 3
Perquimans CountyZone 3
Person CountyZone 3
Pitt CountyZone 3
Polk CountyZone 2
Randolph CountyZone 3
Richmond CountyZone 3
Robeson CountyZone 3
Rockingham CountyZone 1
Rowan CountyZone 3
Rutherford CountyZone 2
Sampson CountyZone 3
Scotland CountyZone 3
Stanly CountyZone 3
Stokes CountyZone 2
Surry CountyZone 2
Swain CountyZone 2
Transylvania CountyZone 1
Tyrrell CountyZone 3
Union CountyZone 3
Vance CountyZone 2
Wake CountyZone 2
Warren CountyZone 2
Washington CountyZone 3
Watauga CountyZone 1
Wayne CountyZone 3
Wilkes CountyZone 2
Wilson CountyZone 3
Yadkin CountyZone 2
Yancey CountyZone 2

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