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RankingsVirginiaHighest radon potential

Counties with the Highest Radon Potential in Virginia

The top 25 of 127 Virginia counties on GIS Map, ranked by EPA radon zone, where zone 1 carries the highest predicted indoor radon potential and zone 3 the lowest.

#CountyEPA radon zone
1Accomack County
3
2Alexandria city
3
3Caroline County
3
4Chesapeake city
3
5Colonial Heights city
3
6Emporia city
3
7Essex County
3
8Franklin city
3
9Fredericksburg city
3
10Gloucester County
3
11Greensville County
3
12Hampton city
3
13Hanover County
3
14Henrico County
3
15Hopewell city
3
16Isle of Wight County
3
17King and Queen County
3
18King George County
3
19King William County
3
20Lancaster County
3
21Martinsville city
3
22Mathews County
3
23Middlesex County
3
24New Kent County
3
25Newport News city
3

Source: EPA Map of Radon Zones (September 2025). All counties with data are ranked. Estimates carry margins of error.

Citing this page: GIS Map, “Counties with the Highest Radon Potential in Virginia”, https://gismap.land/rankings/virginia/highest-radon-counties. Figures from EPA Map of Radon Zones (September 2025).

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