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Radon zones in Virginia

The EPA assigns every county in Virginia to one of three radon potential zones. 62 are in Zone 1, the highest category, home to about 43% of the state's residents.

133
Counties
62
Zone 1 counties
Predicted average above 4 pCi/L
28
Zone 2 counties
Predicted average 2-4 pCi/L
43
Zone 3 counties
Predicted average below 2 pCi/L

The map

Radon potential across Virginia

Every county in Virginia, filled by the zone the EPA assigns it. Zones follow geology rather than county lines, so the colour usually changes where the bedrock does, not where the border is.

Zone 1 · 62Zone 2 · 28Zone 3 · 43

Hover a county · click to open it

County by county

All 133 Virginia counties

Zone 1 · > 4 pCi/LZone 2 · 2 - 4 pCi/LZone 3 · < 2 pCi/L
CountyZonePopulationCOPDSmokingLung ca. deaths
Alleghany County115k9.9%16.6%53.2
Amelia County113k9.7%17.7%52.4
Appomattox County117k8.7%15.8%34.4
Augusta County178k8.1%14.5%31.7
Bath County14,05112.9%19.3%49.6
Bland County16,1798.8%16.0%31.1
Botetourt County134k7.6%13.0%36.0
Bristol city117k10.0%17.2%51.6
Brunswick County116k9.6%17.9%45.5
Buckingham County117k9.3%18.4%49.4
Buena Vista city16,5668.8%15.8%47.6
Campbell County155k8.4%15.3%31.2
Chesterfield County1384k5.6%11.5%30.8
Clarke County115k6.8%11.7%25.7
Covington city15,54511.0%19.9%43.2
Craig County14,8439.4%15.6% -
Cumberland County19,8788.8%15.4%31.6
Danville city142k10.7%19.1%45.3
Dinwiddie County128k7.4%14.6%42.4
Fairfax city125k4.5%9.2%42.9
Fairfax County11.1M4.1%8.1%15.7
Falls Church city115k3.6%6.7%20.7
Fluvanna County128k6.8%12.5%31.8
Frederick County196k6.8%13.0%33.5
Giles County116k8.9%16.0%54.1
Goochland County127k6.1%10.1%25.8
Harrisonburg city151k6.1%13.2%27.7
Henry County150k11.0%17.8%39.9
Highland County12,3399.3%12.8% -
Lee County122k12.6%21.2%63.3
Lexington city17,5284.7%9.2% -
Louisa County141k8.1%14.9%34.4
Manassas city143k5.0%12.0%29.8
Manassas Park city116k5.5%13.8% -
Montgomery County199k6.0%11.8%27.7
Nottoway County116k8.9%18.0%54.6
Orange County139k7.4%13.7%38.4
Page County124k9.5%17.0%46.4
Patrick County118k11.0%17.2%47.3
Petersburg city133k8.4%16.9%60.0
Pittsylvania County160k10.8%18.1%37.2
Powhatan County132k6.7%12.8%36.8
Pulaski County134k9.0%15.7%43.6
Radford city117k6.6%14.0%36.2
Roanoke city197k8.4%16.5%47.9
Roanoke County197k6.8%11.9%28.1
Rockbridge County122k8.8%13.8%32.1
Rockingham County187k7.7%13.9%30.3
Russell County125k11.4%19.0%38.7
Salem city126k7.1%13.0%41.3
Scott County121k11.6%18.6%49.9
Shenandoah County145k9.1%15.9%39.3
Smyth County129k10.9%18.3%59.2
Spotsylvania County1150k6.1%12.8%32.0
Stafford County1165k4.8%11.0%31.9
Staunton city126k7.5%13.5%40.6
Tazewell County139k10.9%18.1%47.3
Warren County142k7.6%15.0%50.4
Washington County154k8.8%14.8%44.2
Waynesboro city123k7.9%15.2%52.3
Winchester city128k8.3%15.5%40.1
Wythe County128k9.6%16.7%38.1
Albemarle County2116k5.2%9.0%20.6
Amherst County231k8.7%15.6%44.2
Arlington County2234k3.2%7.0%17.7
Bedford County282k7.6%13.2% -
Buchanan County219k13.0%21.6%50.5
Carroll County229k11.1%17.9%33.7
Charlotte County211k11.5%19.2%61.2
Charlottesville city245k5.4%11.1%26.8
Culpeper County255k7.0%13.7%29.6
Dickenson County214k12.6%20.6%49.0
Fauquier County275k6.0%11.5%30.8
Floyd County216k8.6%15.0%29.8
Franklin County256k9.2%15.0%33.7
Galax city26,71710.7%19.2%60.3
Grayson County215k12.1%19.8%45.2
Greene County221k7.6%14.2%28.2
Halifax County233k11.2%18.4%43.3
Loudoun County2436k3.7%8.4%19.1
Lunenburg County212k10.6%18.9%46.1
Lynchburg city280k6.2%12.3%44.1
Madison County214k8.2%14.1%34.1
Mecklenburg County231k10.3%16.3%45.2
Nelson County215k9.1%13.7%37.2
Norton city23,49210.5%19.8% -
Prince Edward County222k7.7%14.6%54.9
Prince William County2490k4.7%11.1%26.2
Rappahannock County27,4148.8%13.5%21.4
Wise County235k10.5%19.4%65.7
Accomack County333k10.6%16.5%40.3
Alexandria city3155k4.1%9.0%21.5
Caroline County333k7.4%15.2%42.9
Charles City County36,6109.5%16.6%38.0
Chesapeake city3254k5.9%12.5%34.7
Colonial Heights city318k6.7%12.8%53.8
Emporia city35,46310.1%18.6%54.1
Essex County311k9.8%16.9%38.5
Franklin city38,3399.3%16.8%52.9
Fredericksburg city329k5.2%11.7%32.0
Gloucester County340k7.4%13.5%42.3
Greensville County311k8.4%19.2%52.5
Hampton city3137k6.9%14.1%36.7
Hanover County3114k6.1%11.8%33.5
Henrico County3335k5.7%11.4%35.1
Hopewell city323k10.1%20.3%62.5
Isle of Wight County341k7.1%13.2%33.6
James City County383k6.2%9.7%24.4
King and Queen County36,7209.6%16.4%47.0
King George County329k6.1%13.1%42.7
King William County319k6.7%13.8%44.2
Lancaster County311k10.3%13.4%61.7
Martinsville city314k10.2%19.1%47.7
Mathews County38,5148.8%13.1%30.9
Middlesex County311k9.3%13.1%45.1
New Kent County326k6.1%12.3%54.2
Newport News city3183k6.5%14.1%36.4
Norfolk city3231k6.3%13.7%40.7
Northampton County312k9.9%14.4%37.0
Northumberland County312k9.0%12.0%39.5
Poquoson city313k6.1%11.2%38.7
Portsmouth city397k7.6%16.4%43.0
Prince George County343k5.9%13.8%43.5
Richmond city3229k6.2%14.2%34.0
Richmond County39,1848.8%17.3%39.0
Southampton County318k8.0%15.0%43.1
Suffolk city3101k6.3%13.2%32.8
Surry County36,5938.5%14.4%30.1
Sussex County311k8.0%17.1%55.9
Virginia Beach city3454k5.6%11.9%34.0
Westmoreland County319k10.7%17.1%45.1
Williamsburg city316k5.3%9.7%32.5
York County371k5.2%10.0%30.8

Zones from the EPA Map of Radon Zones. COPD and smoking are CDC PLACES model-based estimates of adult prevalence. Lung cancer death rates are age-adjusted deaths per 100,000 per year, 2019-2023, from NCI State Cancer Profiles. A dash means the source does not report a value for that county.

Highest potential

Zone 1 counties in Virginia

These 62 counties have a predicted average indoor radon screening level above the EPA action level. The EPA recommends every home in them be tested.

Other states

Radon zones elsewhere