North Carolina Radon Zone Map
Counties colored by EPA radon zone. Red = Zone 1, Orange = Zone 2, Green = Zone 3.
Highest-Risk Counties
AlleghanyZone 1 — High
Buncombe34% above action level
CherokeeZone 1 — High
Henderson21.2% above action level
MitchellZone 1 — High
Rockingham35% above action level
TransylvaniaZone 1 — High
WataugaZone 1 — High
All 100 Counties — By Radon Risk
| County | EPA Zone | Tests | % Above 4 pCi/L |
|---|
| Alleghany |
High |
— |
— |
| Buncombe |
High |
50 |
34% |
| Cherokee |
High |
6 |
— |
| Henderson |
High |
33 |
21.2% |
| Mitchell |
High |
— |
— |
| Rockingham |
High |
20 |
35% |
| Transylvania |
High |
7 |
— |
| Watauga |
High |
6 |
— |
| Alexander |
Moderate |
6 |
— |
| Ashe |
Moderate |
5 |
— |
| Avery |
Moderate |
— |
— |
| Burke |
Moderate |
16 |
43.8% |
| Caldwell |
Moderate |
15 |
26.7% |
| Caswell |
Moderate |
7 |
— |
| Catawba |
Moderate |
24 |
45.8% |
| Clay |
Moderate |
— |
— |
| Cleveland |
Moderate |
19 |
36.8% |
| Forsyth |
Moderate |
63 |
30.2% |
| Franklin |
Moderate |
12 |
41.7% |
| Gaston |
Moderate |
36 |
41.7% |
| Graham |
Moderate |
— |
— |
| Haywood |
Moderate |
18 |
27.8% |
| Iredell |
Moderate |
30 |
26.7% |
| Jackson |
Moderate |
4 |
— |
| Lincoln |
Moderate |
15 |
46.7% |
| Macon |
Moderate |
8 |
— |
| Madison |
Moderate |
— |
— |
| McDowell |
Moderate |
9 |
— |
| Polk |
Moderate |
5 |
— |
| Rutherford |
Moderate |
13 |
38.5% |
| Stokes |
Moderate |
11 |
— |
| Surry |
Moderate |
17 |
29.4% |
| Swain |
Moderate |
— |
— |
| Vance |
Moderate |
10 |
— |
| Wake |
Moderate |
128 |
28.9% |
| Warren |
Moderate |
5 |
— |
| Wilkes |
Moderate |
9 |
55.6% |
| Yadkin |
Moderate |
7 |
— |
| Yancey |
Moderate |
— |
— |
| Alamance |
Low |
27 |
33.3% |
| Anson |
Low |
6 |
— |
| Beaufort |
Low |
9 |
44.4% |
| Bertie |
Low |
— |
— |
| Bladen |
Low |
5 |
— |
| Brunswick |
Low |
31 |
45.2% |
| Cabarrus |
Low |
25 |
40% |
| Camden |
Low |
— |
— |
| Carteret |
Low |
16 |
37.5% |
| Chatham |
Low |
16 |
25% |
| Chowan |
Low |
4 |
— |
| Columbus |
Low |
12 |
— |
| Craven |
Low |
20 |
40% |
| Cumberland |
Low |
46 |
26.1% |
| Currituck |
Low |
— |
— |
| Dare |
Low |
7 |
— |
| Davidson |
Low |
30 |
33.3% |
| Davie |
Low |
11 |
— |
| Duplin |
Low |
10 |
— |
| Durham |
Low |
40 |
25% |
| Edgecombe |
Low |
10 |
40% |
| Gates |
Low |
— |
— |
| Granville |
Low |
9 |
55.6% |
| Greene |
Low |
4 |
— |
| Guilford |
Low |
87 |
28.7% |
| Halifax |
Low |
15 |
26.7% |
| Harnett |
Low |
23 |
26.1% |
| Hertford |
Low |
— |
— |
| Hoke |
Low |
5 |
— |
| Hyde |
Low |
— |
— |
| Johnston |
Low |
30 |
23.3% |
| Jones |
Low |
— |
— |
| Lee |
Low |
10 |
50% |
| Lenoir |
Low |
15 |
— |
| Martin |
Low |
6 |
— |
| Mecklenburg |
Low |
133 |
26.3% |
| Montgomery |
Low |
6 |
— |
| Moore |
Low |
19 |
31.6% |
| Nash |
Low |
18 |
38.9% |
| New Hanover |
Low |
41 |
34.1% |
| Northampton |
Low |
5 |
— |
| Onslow |
Low |
19 |
36.8% |
| Orange |
Low |
17 |
35.3% |
| Pamlico |
Low |
4 |
— |
| Pasquotank |
Low |
7 |
— |
| Pender |
Low |
9 |
— |
| Perquimans |
Low |
— |
— |
| Person |
Low |
7 |
— |
| Pitt |
Low |
28 |
28.6% |
| Randolph |
Low |
25 |
40% |
| Richmond |
Low |
11 |
36.4% |
| Robeson |
Low |
24 |
25% |
| Rowan |
Low |
29 |
34.5% |
| Sampson |
Low |
13 |
— |
| Scotland |
Low |
7 |
— |
| Stanly |
Low |
13 |
38.5% |
| Tyrrell |
Low |
— |
— |
| Union |
Low |
33 |
30.3% |
| Washington |
Low |
4 |
— |
| Wayne |
Low |
20 |
30% |
| Wilson |
Low |
14 |
28.6% |
Sources: EPA Map of Radon Zones, CDC Environmental Health Tracking Network
Frequently Asked Questions
How many counties in North Carolina have high radon risk?
North Carolina has 8 counties classified as EPA Zone 1 (high radon risk), 31 as Zone 2 (moderate), and 61 as Zone 3 (low risk).
Is radon a problem in North Carolina?
North Carolina has 8 high-risk counties where elevated radon is likely. The EPA recommends all homes in North Carolina be tested for radon, regardless of which zone they're in.
How do I check radon levels for my North Carolina address?
Enter your ZIP code in the search box above to see your county's EPA radon zone and available testing data. For your specific home's radon level, you'll need a radon test kit.