Is radon high in Gainesville, Florida?

Low. Averaging the model's ZIP-code predictions across Gainesville (weighted by how much of the city each ZIP covers) gives a long-term basement mean of 1.5 pCi/L - about 18% below the US average of 1.8 and about 1.2× the Florida average of 1.3. That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. Gainesville ranks 4 of 89 Florida cities on this site.

Which Gainesville ZIP codes have the highest radon?

Predictions for the 9 modeled ZIP codes in Gainesville range from 1.1 to 1.6 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 Gainesville?

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

What does EPA Radon Zone 2 mean for Gainesville?

Gainesville sits mainly in Alachua 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 1.5 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 Gainesville, Florida

LowEPA Zone 2

Predicted long-term basement average of 1.5 pCi/L (model estimate) across the 9 modeled ZIP codes in Gainesville - about 18% below the US average of 1.8, about 1.2× the Florida average of 1.3. Ranked #4 of 89 Florida cities on this site. Most of the city lies in Alachua County.

Test Gainesville, FL 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.

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.

1.5 ± 0.06

pCi/L predicted basement mean (model SD)

1.5 ± 0.09

pCi/L predicted upstairs (above-ground) mean

1.1-1.6

range of ZIP-level basement predictions in the city

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

What this means for Gainesville

The typical Gainesville 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 1.6 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 Alachua County as Zone 2 while the newer model predicts 1.5 pCi/L for Gainesville; where they disagree, we grade on the model but show both.

Comparable Florida cities: Cape Coral (1.4), Ocala (1.5), Palm Beach Gardens (1.4), North Port (1.4).

ZIP codes in Gainesville

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
32609	24%	1.5 ± 0.06	1.1	Low
32653	22%	1.6 ± 0.05	1.7	Low
32605	14%	1.6 ± 0.07	2.4	Low
32608	10%	1.3 ± 0.08	1.3	Low
32607	9%	1.4 ± 0.08	1.6	Low
32641	9%	1.4 ± 0.06	1.0	Low
32601	7%	1.2 ± 0.07	1.0	Low
32606	2%	1.5 ± 0.06	1.9	Low
32612	2%	—	—	no model
32603	1%	1.1 ± 0.08	1.1	Low
32610	<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.

Gainesville radon questions

Is radon high in Gainesville, Florida?: Low. Averaging the model's ZIP-code predictions across Gainesville (weighted by how much of the city each ZIP covers) gives a long-term basement mean of 1.5 pCi/L - about 18% below the US average of 1.8 and about 1.2× the Florida average of 1.3. That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. Gainesville ranks 4 of 89 Florida cities on this site.
Which Gainesville ZIP codes have the highest radon?: Predictions for the 9 modeled ZIP codes in Gainesville range from 1.1 to 1.6 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 Gainesville?: Yes, once. The EPA recommends testing every home regardless of area. A short-term kit costs little and settles the question for your house; Gainesville's low predicted average describes the typical home, not yours.
What does EPA Radon Zone 2 mean for Gainesville?: Gainesville sits mainly in Alachua 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 1.5 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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