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Radon zones in Arkansas

The EPA assigns every county in Arkansas to one of three radon potential zones. No county in Arkansas is in Zone 1. That is a statement about predicted county averages, not about any individual home - homes above the action level are found in all three zones.

75
Counties
0
Zone 1 counties
Predicted average above 4 pCi/L
14
Zone 2 counties
Predicted average 2-4 pCi/L
61
Zone 3 counties
Predicted average below 2 pCi/L

The map

Radon potential across Arkansas

Every county in Arkansas, 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 · 0Zone 2 · 14Zone 3 · 61

Hover a county · click to open it

County by county

All 75 Arkansas counties

Zone 1 · > 4 pCi/LZone 2 · 2 - 4 pCi/LZone 3 · < 2 pCi/L
CountyZonePopulationCOPDSmokingLung ca. deaths
Baxter County243k11.5%16.6%48.8
Benton County2311k5.9%11.7%32.7
Boone County239k9.3%16.4%49.3
Carroll County229k10.4%17.0%41.3
Fulton County212k13.2%20.4%55.1
Garland County2100k9.5%15.5%37.9
Independence County238k9.7%17.1%38.7
Izard County214k12.2%19.8%60.1
Marion County218k12.1%18.0%56.6
Montgomery County28,62012.0%17.8%44.3
Randolph County219k11.2%20.0%57.9
Searcy County27,80613.7%20.9%59.8
Sharp County218k12.3%19.3%56.7
Stone County213k13.2%19.7%55.4
Arkansas County316k9.6%17.3%50.1
Ashley County318k11.9%20.0%46.4
Bradley County310k10.7%18.9%42.3
Calhoun County34,6418.9%16.0%59.0
Chicot County39,53811.5%19.7%61.2
Clark County321k8.1%15.0%58.7
Clay County314k10.8%18.3%57.5
Cleburne County325k11.1%17.4%48.8
Cleveland County37,37810.3%17.7%54.8
Columbia County322k8.8%16.1%46.7
Conway County321k10.7%18.8%43.8
Craighead County3114k7.9%15.8%52.0
Crawford County362k9.2%16.8%52.9
Crittenden County347k9.3%18.5%55.3
Cross County316k10.8%19.8%45.1
Dallas County36,1859.5%16.3%61.4
Desha County310k13.1%22.3%45.2
Drew County317k9.8%17.4%41.7
Faulkner County3130k6.7%13.6%40.3
Franklin County317k11.2%19.5%64.5
Grant County318k8.2%15.6%50.5
Greene County347k9.7%18.5%55.6
Hempstead County319k9.8%17.7%54.2
Hot Spring County333k9.8%18.6%50.5
Howard County313k9.5%17.1%40.8
Jackson County317k11.1%21.1%65.5
Jefferson County364k9.3%17.3%49.6
Johnson County326k10.3%18.3%58.8
Lafayette County36,09513.6%21.5%41.0
Lawrence County316k11.3%19.8%66.4
Lee County38,20111.7%22.3%40.8
Lincoln County313k8.8%19.9%64.4
Little River County312k10.2%17.8%46.2
Logan County321k10.4%18.0%57.3
Lonoke County376k7.5%16.0%46.0
Madison County318k10.5%19.0%44.7
Miller County342k10.1%19.1%48.9
Mississippi County339k9.6%18.8%62.7
Monroe County36,51211.5%19.1%47.2
Nevada County38,12011.8%20.4%60.7
Newton County37,07111.3%17.8%37.5
Ouachita County322k10.3%18.2%48.4
Perry County310k10.2%17.6%53.1
Phillips County315k12.4%21.0%49.1
Pike County310k10.2%17.4%65.7
Poinsett County322k11.3%20.4%73.0
Polk County319k11.4%18.6%39.8
Pope County365k9.1%16.4%44.3
Prairie County38,03610.4%17.3%45.3
Pulaski County3400k7.2%13.4%36.3
Saline County3130k7.2%14.2%42.0
Scott County39,85110.6%18.5%58.7
Sebastian County3129k8.5%16.1%42.8
Sevier County316k9.9%18.8%44.1
St. Francis County322k10.9%21.8%51.6
Union County337k9.6%17.6%44.7
Van Buren County316k12.6%19.3%48.1
Washington County3262k6.5%13.4%30.0
White County378k9.3%17.4%46.4
Woodruff County35,96412.3%20.2%44.7
Yell County320k9.9%18.4%39.1

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.

Other states

Radon zones elsewhere