Is radon high in Little Rock, Arkansas?

Low. Averaging the model's ZIP-code predictions across Little Rock (weighted by how much of the city each ZIP covers) gives a long-term basement mean of 1.5 pCi/L - about 16% below the US average of 1.8 and close to the Arkansas average of 1.8. That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. Little Rock ranks 9 of 9 Arkansas cities on this site.

Which Little Rock ZIP codes have the highest radon?

Predictions for the 14 modeled ZIP codes in Little Rock range from 1.3 to 1.8 pCi/L in the basement. 0% of them are predicted at or above 4 pCi/L and 0% at or above 2. The city is fairly uniform, so the city-wide number is a reasonable guide for any neighborhood.

Should I test for radon in Little Rock?

Yes, once. The EPA recommends testing every home regardless of area. A short-term kit costs little and settles the question for your house; Little Rock's low predicted average describes the typical home, not yours.

What does EPA Radon Zone 3 mean for Little Rock?

Little Rock sits mainly in Pulaski County, which the EPA classifies as Zone 3 - low potential (< 2 pCi/L). The zone map dates from 1993 and covers whole counties. The 2001-2021 model agrees with the zone for the city. Neither replaces a test of your own home.

Radon levels in Little Rock, Arkansas

LowEPA Zone 3

Predicted long-term basement average of 1.5 pCi/L (model estimate) across the 14 modeled ZIP codes in Little Rock - about 16% below the US average of 1.8, close to the Arkansas average of 1.8. Ranked #9 of 9 Arkansas cities on this site. Most of the city lies in Pulaski County (its ZIPs also reach into 1 other county).

Test Little Rock, AR once anyway - radon varies house to house

The predicted basement average here is 1.5 pCi/L, below the EPA's 2 pCi/L "consider fixing" threshold. That's good news for the area - but the EPA still recommends every home be tested, because foundation cracks, soil pockets and ventilation make one house very different from its neighbor. One inexpensive kit settles it.

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Predicted (model estimate). The pCi/L figures on this page are long-term area averages from a peer-reviewed national model built on millions of real radon tests (2001-2021). They describe the typical home in this area - not your home, which can be several times higher or lower. The EPA radon zone is a separate, 1993 county-level classification. How the numbers work.

1.5 ± 0.06

pCi/L predicted basement mean (model SD)

0.8 ± 0.07

pCi/L predicted upstairs (above-ground) mean

1.3-1.8

range of ZIP-level basement predictions in the city

of Little Rock ZIPs predicted ≥ 4 pCi/L (0% ≥ 2)

What this means for Little Rock

The typical Little Rock home is predicted below 2 pCi/L, the lowest band. That describes the average house; the ZIP-level predictions inside the city still span 1.3 to 1.8 pCi/L.

The city figure is not a separate estimate: it is the mean of the model's ZIP-code predictions, weighted by the share of the city's land in each ZIP (Census 2020 ZCTA-to-place relationship file). The 1993 EPA zone (3) for Pulaski and the 2001-2021 model agree here.

Comparable Arkansas cities: North Little Rock (1.5), Fort Smith (1.6), Conway (1.7), Jonesboro (1.7).

ZIP codes in Little Rock

ZIPs that overlap the city, largest share of its land first. Predicted basement and upstairs means are model estimates; ZIPs the model does not cover show a dash.

ZIP	Share of city	Basement	Upstairs	Grade
72209	15%	1.3 ± 0.06	0.7	Low
72206	15%	1.5 ± 0.06	0.9	Low
72223	13%	1.6 ± 0.06	0.8	Low
72204	13%	1.5 ± 0.07	0.8	Low
72211	7%	1.4 ± 0.06	0.6	Low
72205	7%	1.6 ± 0.06	0.8	Low
72202	6%	1.5 ± 0.06	0.8	Low
72210	6%	1.8 ± 0.06	0.9	Low
72103	5%	1.6 ± 0.07	0.9	Low
72212	5%	1.5 ± 0.06	0.8	Low
72227	3%	1.6 ± 0.05	0.8	Low
72207	3%	1.6 ± 0.06	0.8	Low
72002	2%	1.8 ± 0.06	0.9	Low
72201	1%	1.4 ± 0.07	0.7	Low

Testing help in Arkansas

We link only state program pages we could verify, and Arkansas's did not respond when we checked, so start from the EPA state radon contacts page. If a test comes back at 4 pCi/L or higher, mitigation typically costs $800-$2,500 installed; use EPA find-a-professional and read the mitigation guide.

Little Rock radon questions

Is radon high in Little Rock, Arkansas?: Low. Averaging the model's ZIP-code predictions across Little Rock (weighted by how much of the city each ZIP covers) gives a long-term basement mean of 1.5 pCi/L - about 16% below the US average of 1.8 and close to the Arkansas average of 1.8. That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. Little Rock ranks 9 of 9 Arkansas cities on this site.
Which Little Rock ZIP codes have the highest radon?: Predictions for the 14 modeled ZIP codes in Little Rock range from 1.3 to 1.8 pCi/L in the basement. 0% of them are predicted at or above 4 pCi/L and 0% at or above 2. The city is fairly uniform, so the city-wide number is a reasonable guide for any neighborhood.
Should I test for radon in Little Rock?: Yes, once. The EPA recommends testing every home regardless of area. A short-term kit costs little and settles the question for your house; Little Rock's low predicted average describes the typical home, not yours.
What does EPA Radon Zone 3 mean for Little Rock?: Little Rock sits mainly in Pulaski County, which the EPA classifies as Zone 3 - low potential (< 2 pCi/L). The zone map dates from 1993 and covers whole counties. The 2001-2021 model agrees with the zone for the city. Neither replaces a test of your own home.

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