Is radon high in Tallahassee, Florida?

Low. Averaging the model's ZIP-code predictions across Tallahassee (weighted by how much of the city each ZIP covers) gives a long-term basement mean of 1.4 pCi/L - about 24% below the US average of 1.8 and close to the Florida average of 1.3. That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. Tallahassee ranks 11 of 89 Florida cities on this site.

Which Tallahassee ZIP codes have the highest radon?

Predictions for the 10 modeled ZIP codes in Tallahassee range from 1.1 to 1.5 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 Tallahassee?

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

What does EPA Radon Zone 2 mean for Tallahassee?

Tallahassee sits mainly in Leon County, which the EPA classifies as Zone 2 - moderate potential (2-4 pCi/L). The zone map dates from 1993 and covers whole counties. The newer model's city average of 1.4 pCi/L does not line up with Zone 2, which is common - the EPA itself says high-radon homes exist in every zone. Neither replaces a test of your own home.

Radon levels in Tallahassee, Florida

LowEPA Zone 2

Predicted long-term basement average of 1.4 pCi/L (model estimate) across the 10 modeled ZIP codes in Tallahassee - about 24% below the US average of 1.8, close to the Florida average of 1.3. Ranked #11 of 89 Florida cities on this site. Most of the city lies in Leon County.

Test Tallahassee, FL once anyway - radon varies house to house

The predicted basement average here is 1.4 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.

Get a short-term test kit →Or track it with a continuous monitor

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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.

1.4 ± 0.06

pCi/L predicted basement mean (model SD)

1.2 ± 0.09

pCi/L predicted upstairs (above-ground) mean

1.1-1.5

range of ZIP-level basement predictions in the city

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

What this means for Tallahassee

The typical Tallahassee home is predicted below 2 pCi/L, the lowest band. That describes the average house; the ZIP-level predictions inside the city still span 1.1 to 1.5 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). Note that the EPA classifies Leon County as Zone 2 while the newer model predicts 1.4 pCi/L for Tallahassee; where they disagree, we grade on the model but show both.

Comparable Florida cities: Fort Myers (1.4), Jupiter (1.4), Apopka (1.4), Greenacres (1.4).

ZIP codes in Tallahassee

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
32309	15%	1.5 ± 0.06	1.4	Low
32311	13%	1.5 ± 0.06	1.1	Low
32308	11%	1.4 ± 0.05	1.6	Low
32312	11%	1.5 ± 0.06	1.4	Low
32303	10%	1.4 ± 0.07	1.3	Low
32301	10%	1.3 ± 0.08	1.3	Low
32310	9%	1.2 ± 0.07	0.8	Low
32305	9%	1.4 ± 0.07	0.8	Low
32304	7%	1.1 ± 0.08	0.9	Low
32317	3%	1.5 ± 0.06	1.3	Low
32399	1%	—	—	no model
32307	<1%	—	—	no model
32313	<1%	—	—	no model
32306	<1%	—	—	no model

Testing help in Florida

Florida's radon program page is at www.floridahealth.gov and, when we checked it, offered a free radon test kit on request. 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.

Tallahassee radon questions

Is radon high in Tallahassee, Florida?: Low. Averaging the model's ZIP-code predictions across Tallahassee (weighted by how much of the city each ZIP covers) gives a long-term basement mean of 1.4 pCi/L - about 24% below the US average of 1.8 and close to the Florida average of 1.3. That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. Tallahassee ranks 11 of 89 Florida cities on this site.
Which Tallahassee ZIP codes have the highest radon?: Predictions for the 10 modeled ZIP codes in Tallahassee range from 1.1 to 1.5 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 Tallahassee?: Yes, once. The EPA recommends testing every home regardless of area. A short-term kit costs little and settles the question for your house; Tallahassee's low predicted average describes the typical home, not yours.
What does EPA Radon Zone 2 mean for Tallahassee?: Tallahassee sits mainly in Leon County, which the EPA classifies as Zone 2 - moderate potential (2-4 pCi/L). The zone map dates from 1993 and covers whole counties. The newer model's city average of 1.4 pCi/L does not line up with Zone 2, which is common - the EPA itself says high-radon homes exist in every zone. Neither replaces a test of your own home.

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