Radon in Virginia: radon map by county

EPA's Map of Radon Zones puts 62 of Virginia's 133 counties in Zone 1 (predicted average indoor radon above 4 pCi/L), 28 in Zone 2 and 43 in Zone 3. Of 40,388 building tests that radon laboratories reported for 2008 to 2017, 30.8% were at or above EPA's 4 pCi/L action level, against 36.5% nationally (number 21 of 42 states with 1,000+ tests). The highest county share is Russell County (67.3% of 34 tests).

counties in Zone 1 (above 4 pCi/L predicted)

counties in Zone 2 (2 to 4)

counties in Zone 3 (below 2)

30.8%

of 40,388 lab tests at or above 4 pCi/L

Radon by county in Virginia

EPA radon zone and radon test results for each county in Virginia
County	EPA zone	Lab tests	Median	4+ pCi/L
Accomack County	Zone 3	2	0.1	0%
Albemarle County	Zone 2	1,143	2.1	24.7%
Alexandria city	Zone 3	327	1.0	7.3%
Alleghany County	Zone 1	35	3.0	40%
Amelia County	Zone 1	10	2.0	27.3%
Amherst County	Zone 2	190	2.9	36.8%
Appomattox County	Zone 1	40	2.1	10%
Arlington County	Zone 2	787	1.4	13.7%
Augusta County	Zone 1	450	4.0	50.1%
Bath County	Zone 1	11	2.3	18.2%
Bedford County	Zone 2	562	2.1	23.5%
Bland County	Zone 1	12	2.6	46.2%
Botetourt County	Zone 1	401	3.3	42.1%
Bristol city	Zone 1	81	4.2	50.9%
Brunswick County	Zone 1	19	2.8	39.5%
Buchanan County	Zone 2	18	2.7	25%
Buckingham County	Zone 1	18	1.5	13.8%
Buena Vista city	Zone 1	6	10.4	85.7%
Campbell County	Zone 1	277	3.2	39.7%
Caroline County	Zone 3	197	2.5	32.7%
Carroll County	Zone 2	64	5.0	61.8%
Charles City County	Zone 3	2	1.1	0%
Charlotte County	Zone 2	10	3.7	40%
Charlottesville city	Zone 2	404	1.8	21%
Chesapeake city	Zone 3	17	0.6	7%
Chesterfield County	Zone 1	530	2.2	29.6%
Clarke County	Zone 1	304	3.5	47.7%
Colonial Heights city	Zone 3	7	1.1	30%
Covington city	Zone 1	4	3.3	40%
Craig County	Zone 1	10	2.8	46.2%
Culpeper County	Zone 2	885	3.2	40.1%
Cumberland County	Zone 1	7	2.1	16.7%
Danville city	Zone 1	50	3.0	35.1%
Dickenson County	Zone 2	7	3.4	40%
Dinwiddie County	Zone 1	16	1.9	35%
Emporia city	Zone 3	2	3.1	50%
Essex County	Zone 3	10	3.2	7.7%
Fairfax city	Zone 1	83	1.4	14.3%
Fairfax County	Zone 1	6,272	1.5	18.7%
Falls Church city	Zone 1	60	1.5	18.1%
Fauquier County	Zone 2	1,104	2.5	30.2%
Floyd County	Zone 2	37	3.3	42.6%
Fluvanna County	Zone 1	265	2.5	28.1%
Franklin city	Zone 3	1	0.9	0%
Franklin County	Zone 2	476	2.0	21.2%
Frederick County	Zone 1	2,075	3.3	44.1%
Fredericksburg city	Zone 3	370	2.3	26.1%
Galax city	Zone 2	16	3.3	38.9%
Giles County	Zone 1	140	4.8	56.9%
Gloucester County	Zone 3	8	2.0	25%
Goochland County	Zone 1	72	2.4	30.7%
Grayson County	Zone 2	39	3.8	44.7%
Greene County	Zone 2	166	2.8	34.6%
Greensville County	Zone 3	1	0.7	0%
Halifax County	Zone 2	25	2.2	18.9%
Hampton city	Zone 3	12	0.1	10.5%
Hanover County	Zone 3	118	1.9	23%
Harrisonburg city	Zone 1	353	2.4	33.4%
Henrico County	Zone 3	403	2.1	27%
Henry County	Zone 1	80	2.7	35.7%
Highland County	Zone 1	3	1.1	22.2%
Hopewell city	Zone 3	9	2.4	25%
Isle of Wight County	Zone 3	2	1.1	33.3%
James City County	Zone 3	61	2.6	37.3%
King and Queen County	Zone 3	2	2.4	28.6%
King George County	Zone 3	473	3.6	45.5%
King William County	Zone 3	6	2.4	14.3%
Lancaster County	Zone 3	4	2.5	12.5%
Lee County	Zone 1	9	4.9	50%
Lexington city	Zone 1	24	1.6	18.8%
Loudoun County	Zone 2	3,455	1.8	27.4%
Louisa County	Zone 1	240	2.8	38.1%
Lunenburg County	Zone 2	3	0.5	25%
Lynchburg city	Zone 2	534	2.2	25.9%
Madison County	Zone 2	153	3.5	44%
Manassas city	Zone 1	132	1.9	15.9%
Manassas Park city	Zone 1	18	1.4	20%
Martinsville city	Zone 3	27	1.8	27.3%
Mathews County	Zone 3	2	4.0	66.7%
Mecklenburg County	Zone 2	36	3.0	37.9%
Middlesex County	Zone 3	3	2.1	0%
Montgomery County	Zone 1	738	2.5	35.5%
Nelson County	Zone 2	79	2.6	28.7%
New Kent County	Zone 3	12	2.4	30.8%
Newport News city	Zone 3	25	1.4	6.7%
Norfolk city	Zone 3	39	0.5	2.7%
Northampton County	Zone 3	2	1.0	0%
Northumberland County	Zone 3	9	1.0	13.3%
Norton city	Zone 2	3	1.0	0%
Nottoway County	Zone 1	6	2.1	25%
Orange County	Zone 1	430	2.8	36.1%
Page County	Zone 1	104	3.3	38.3%
Patrick County	Zone 1	39	5.3	54.7%
Petersburg city	Zone 1	4	0.5	0%
Pittsylvania County	Zone 1	181	3.0	38.4%
Poquoson city	Zone 3	n/a	n/a	n/a
Portsmouth city	Zone 3	2	1.4	0%
Powhatan County	Zone 1	35	1.7	28%
Prince Edward County	Zone 2	37	2.5	40%
Prince George County	Zone 3	10	1.7	18.2%
Prince William County	Zone 2	3,527	2.3	31.7%
Pulaski County	Zone 1	177	3.9	49.6%
Radford city	Zone 1	75	3.2	41.8%
Rappahannock County	Zone 2	130	3.3	41.6%
Richmond city	Zone 3	375	2.1	27.7%
Richmond County	Zone 3	27	2.1	24.1%
Roanoke city	Zone 1	605	2.3	25.9%
Roanoke County	Zone 1	983	1.9	22.1%
Rockbridge County	Zone 1	91	4.0	50.9%
Rockingham County	Zone 1	1,006	3.3	43.9%
Russell County	Zone 1	34	6.7	67.3%
Salem city	Zone 1	197	2.8	33.6%
Scott County	Zone 1	49	4.0	50.7%
Shenandoah County	Zone 1	297	2.7	36.4%
Smyth County	Zone 1	91	5.5	61%
Southampton County	Zone 3	2	1.1	0%
Spotsylvania County	Zone 1	1,780	2.7	34.2%
Stafford County	Zone 1	2,664	2.5	31.4%
Staunton city	Zone 1	212	4.2	52.7%
Suffolk city	Zone 3	5	0.9	0%
Surry County	Zone 3	n/a	n/a	n/a
Sussex County	Zone 3	1	0.1	0%
Tazewell County	Zone 1	226	2.8	40.3%
Virginia Beach city	Zone 3	34	0.6	4.3%
Warren County	Zone 1	491	2.7	36.9%
Washington County	Zone 1	261	4.8	58.1%
Waynesboro city	Zone 1	138	3.8	48.5%
Westmoreland County	Zone 3	54	1.4	10.7%
Williamsburg city	Zone 3	8	0.8	10.5%
Winchester city	Zone 1	665	3.3	44.8%
Wise County	Zone 2	29	1.3	28.3%
Wythe County	Zone 1	95	6.0	65.5%
York County	Zone 3	17	1.8	26.1%

Lab tests: buildings tested by radon laboratories, 2008 to 2017; median in pCi/L; “4+ pCi/L” is the share of tests at or above EPA's action level. n/a: no value on file (no tests, or too few to report).

What the zones mean

Zone 1 counties have a predicted average indoor radon screening level above 4 pCi/L, Zone 2 from 2 to 4 pCi/L and Zone 3 below 2 pCi/L. The prediction is from 1993 indoor measurements, geology, aerial radioactivity, soils and foundation types. EPA: “This map should not be used to determine if individual homes need to be tested.” EPA recommends fixing a home at 4 pCi/L or more and considering a fix between 2 and 4 pCi/L, because there is no known safe level of exposure.

Radon in Virginia: questions

What radon zone is Virginia?

EPA's 1993 map does not give states one zone; it zones each county. In Virginia, 62 counties are Zone 1, 28 Zone 2 and 43 Zone 3. EPA says the map "should not be used to determine if individual homes need to be tested".

Which Virginia counties have the highest radon levels?

By the share of laboratory tests at or above 4 pCi/L for 2008 to 2017 (counties with 20 or more tests): Russell County 67.3% (median 6.7 pCi/L, 34 tests); Wythe County 65.5% (median 6.0 pCi/L, 95 tests); Carroll County 61.8% (median 5.0 pCi/L, 64 tests); Smyth County 61% (median 5.5 pCi/L, 91 tests); Washington County 58.1% (median 4.8 pCi/L, 261 tests).

How common is high radon in Virginia?

30.8% of the 40,388 tests in the laboratory data for Virginia (2008 to 2017) were at or above 4 pCi/L; the national share was 36.5%. Buildings are tested by choice, often because of a sale or a concern, so the share describes the tests on file, not every home.

Should I test for radon in Virginia?

Yes. EPA recommends testing every home no matter where it is, fixing it at 4 pCi/L or more and considering a fix between 2 and 4 pCi/L, because there is no known safe level of radon exposure.

States bordering Virginia

Radon in Kentucky (30 of 120 in Zone 1)Radon in Maryland (8 of 24 in Zone 1)Radon in North Carolina (8 of 100 in Zone 1)Radon in Tennessee (39 of 95 in Zone 1)Radon in West Virginia (20 of 55 in Zone 1)Radon in Washington, DC (0 of 1 in Zone 1)

Other free hazard lookups

All of these, plus wetlands, FEMA hazard ratings and the federal contamination lists, are in the Environmental Records Report for any US address ($29).

Superfund sites in Virginia · Radon map of every state

Data compiled 2026-10-20. County-level screening information, not a radon measurement of any building.