Skip to content
RADON411

Locations and reports

Radon Levels in St. Francis County, Arkansas

EPA puts St. Francis County in Zone 3, its lowest radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

How to test this homeFind a certified tester

  • Nearest county

    6.8%

    Pulaski County, 91 miles

    Pulaski
    6.8%
    Arkansas
    22.7%

    Share at 4+ pCi/L, 103 tests, 2007 to 2016

  • Ground above low

    10.3%

    11.0 pts below Arkansas

    St. Francis
    10.3%
    Arkansas
    21.3%

    Share of land USGS rates moderate or high potential

  • Tests reported

    0

    None published

    A home here needs its own test

  • EPA radon zone

    Zone 3

    Lower potential

    1. 1
    2. 2
    3. Zone 3

    1 highest, 3 lowest

    EPA predicts under 2 pCi/L indoors

Read a result for St. Francis County

Starts at EPA's action level

4.0pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 4.0 pCi/L

At or above 4 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher.

Interpret this readingWhat a fix costs

The data

St. Francis County, At a glance

St. Francis County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for St. Francis County as a whole is an average indoor of less than 2 pCi/L (less than 75 Bq/m³). A low zone clears no address in it: homes above EPA's turn up in all three zones.

USGS geologic potential: Low across 90% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

No CDC test figures here

CDC has published no radon test figures for St. Francis County. Pulaski County, 91 miles away, is the nearest county with a figure over the 2007 to 2016 laboratory totals.

How to read these figures

St. Francis County, Compared

St. Francis County radon figures, compared

Calculated by Radon411

CDC's county radon counts over the 2007 to 2016 laboratory totals cover 60 Arkansas counties, and St. Francis County is not among them: no year's figure and no ten-year laboratory total names it. Pooled across 60 Arkansas counties, 22.7% of reported tests reached that level; across every county in the country with a figure, 35.8%.

The nearest counties with a figure are Pulaski County (91 miles away) at 6.8%, Saline County (113 miles away) at 31.9% and Garland County (140 miles away) at 45.8%. Statewide for the same period, Garland County reported the highest share (45.8%) and Pulaski County the lowest (6.8%).

EPA's 1993 map puts St. Francis County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 90% of the county's land low radon potential.

Arkansas, the United States and the counties around St. Francis County, 2007 to 2016, laboratory
AreaTestsAt or above 4 pCi/LMedian
Arkansas, pooled60 counties, pooled68722.7%Not pooled
United States, pooled2,666 counties, pooled1,939,02535.8%Not pooled
Garland Countyhighest in the state4845.8%2.9 pCi/L
Pulaski Countylowest in the state1036.8%0.9 pCi/L
Monroe County, ARborders it250.0%3.9 pCi/L
Crittenden County, ARborders it10.0%0.1 pCi/L
The nearest Arkansas counties to St. Francis County with 30 or more tests, 2007 to 2016, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Pulaski County91 mi1036.8%0.9 pCi/L
Saline County113 mi4731.9%2.2 pCi/L
Garland County140 mi4845.8%2.9 pCi/L
Washington County206 mi5614.3%2.2 pCi/L
Benton County217 mi14531.0%1.8 pCi/L

Pooled shares: Radon411's sum of CDC's county counts for one period.

St. Francis County, Geology

The ground under St. Francis County

Predicted

Most of the ground under St. Francis County is one class on USGS's geologic map: 89.7% of its land is low radon potential, with 10.3% moderate. The map puts 89.7% of St. Francis County in the area it calls Mississippi Alluvial Plain and 10.3% in Crowley's Ridge. USGS gives the first a radon index of 8, in the low band (5 to 8), and the second 9, in the moderate band (9 to 11).

USGS's geologic areas under St. Francis County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Mississippi Alluvial PlainAlluvial sand, silt, gravel, and clay.Low889.7%
Crowley's RidgeLoess.Moderate910.3%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

St. Francis County beside the ground around it

Arkansas as a whole has more moderate-potential ground than St. Francis County: 21.3% of its land, against 10.3% here. Of the 5 counties that border it, 1 has more moderate-potential ground, Cross County the most at 17.7%.

Share of land by USGS radon potential: St. Francis County, the 5 counties bordering it and Arkansas
AreaEPA zoneLow potentialModerate potentialHigh potential
St. Francis CountyZone 389.7%10.3%None
Cross CountyZone 382.3%17.7%None
Lee CountyZone 397.6%2.4%None
Crittenden CountyZone 3100%NoneNone
Woodruff CountyZone 3100%NoneNone
Monroe CountyZone 3100%NoneNone
Arkansas75 counties, pooled by land areaVaries78.7%21.3%None

The map rates the ground, not the air in any home.

Local help

St. Francis County, Local resources

Radon testing and mitigation in St. Francis County

What Arkansas's program says
Phone
501-661-2621
Email
ADH.EPI.Radon@arkansas.gov

What it means

St. Francis County, Questions

Questions about radon in St. Francis County

Are radon levels high in St. Francis County?

No CDC testing statistics are published here for St. Francis County, Arkansas yet. Of the 5 nearest counties with a figure, within 217 miles, the share of tests at or above 4 pCi/L runs from 6.8% to 45.8%.

Which counties border St. Francis County?

St. Francis County borders 5 counties: Cross County, Lee County, Crittenden County, Woodruff County and Monroe County.

Products

St. Francis County, Products

Testing a home in St. Francis County

No CDC figure names St. Francis County; the nearest county with one, Pulaski County (91 miles away), reported 6.8% of its tests at or above 4 pCi/L over the 2007 to 2016 laboratory totals, the only reading nearby until a test of this home. Zone 3 is the lowest label, yet homes at or above 4 pCi/L occur in every zone: a short-term kit (2 to 90 days) is the quick first check in St. Francis County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for St. Francis County homes, compared

Explore

St. Francis County, Bordering counties

Counties bordering St. Francis County

Calculated by Radon411

St. Francis County, Cities and towns

Cities and towns in St. Francis County

St. Francis County has been losing residents: from 23,019 in 2020 to 21,800 on July 1, 2025, a fall of 5.3% by the Census Bureau's estimates. That works out to 34 people per square mile of land. Forrest City alone is home to 12,308 of them, 56.5% of the total. CDC publishes no radon test count for St. Francis County; across Arkansas its counts for 2007 to 2016 come to 0.2 tests for every 1,000 residents (2025 estimate).

From Forrest City to Jennette, CDC publishes no figure by town: each reads St. Francis County's.

The cities and towns in St. Francis County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Forrest City12,308−5.2%56.5%
Hughes976−7.2%4.5%
Madison713−6.1%3.3%
Palestine476−5.7%2.2%
Caldwell419−5.6%1.9%
Colt283−5.0%1.3%
Wheatley259−6.5%1.2%
Widener202−3.8%0.9%
Jennetteextends beyond St. Francis County113−4.2%Counted whole

9 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond St. Francis County is counted whole, so it has no share.

St. Francis County, Homes

Homes in St. Francis County

Of St. Francis County's 9,583 homes, 67% are detached houses, against 70% across Arkansas; 12% are mobile homes. Half of its homes were built before 1980, close to Arkansas' 1987: 15% date from before 1960 and 17% from 2000 or later. 55% of occupied homes are lived in by their owner (Arkansas: 66%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in St. Francis County, Arkansas, 2019 to 2023
HomesSt. Francis CountyArkansas
Housing units9,5831,382,664
Detached houses67%70%
In buildings of 5 or more5%10%
Mobile homes12%11%
Built before 196015%14%
Built since 200017%28%
Middle year built19801987
Owner-occupied55%66%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.