Is radon high in Cape Coral, Florida?

Low. Averaging the model's ZIP-code predictions across Cape Coral (weighted by how much of the city each ZIP covers) gives a long-term basement mean of 1.4 pCi/L - about 20% 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. Cape Coral ranks 5 of 89 Florida cities on this site.

Which Cape Coral ZIP codes have the highest radon?

Predictions for the 6 modeled ZIP codes in Cape Coral range from 1.2 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 Cape Coral?

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

What does EPA Radon Zone 3 mean for Cape Coral?

Cape Coral sits mainly in Lee 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 Cape Coral, Florida

LowEPA Zone 3

Predicted long-term basement average of 1.4 pCi/L (model estimate) across the 6 modeled ZIP codes in Cape Coral - about 20% below the US average of 1.8, about 1.2× the Florida average of 1.3. Ranked #5 of 89 Florida cities on this site. Most of the city lies in Lee County.

Test Cape Coral, 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 ± 0.07

pCi/L predicted basement mean (model SD)

1.6 ± 0.09

pCi/L predicted upstairs (above-ground) mean

1.2-1.6

range of ZIP-level basement predictions in the city

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

What this means for Cape Coral

The typical Cape Coral home is predicted below 2 pCi/L, the lowest band. That describes the average house; the ZIP-level predictions inside the city still span 1.2 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). The 1993 EPA zone (3) for Lee and the 2001-2021 model agree here.

Comparable Florida cities: Palm Beach Gardens (1.4), North Port (1.4), Gainesville (1.5), Lakeland (1.4).

ZIP codes in Cape Coral

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
33993	32%	1.4 ± 0.07	1.4	Low
33914	21%	1.6 ± 0.07	2.0	Low
33909	18%	1.4 ± 0.07	1.6	Low
33991	11%	1.5 ± 0.07	1.6	Low
33904	9%	1.2 ± 0.08	1.2	Low
33990	9%	1.3 ± 0.07	1.7	Low

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.

Cape Coral radon questions

Is radon high in Cape Coral, Florida?: Low. Averaging the model's ZIP-code predictions across Cape Coral (weighted by how much of the city each ZIP covers) gives a long-term basement mean of 1.4 pCi/L - about 20% 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. Cape Coral ranks 5 of 89 Florida cities on this site.
Which Cape Coral ZIP codes have the highest radon?: Predictions for the 6 modeled ZIP codes in Cape Coral range from 1.2 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 Cape Coral?: Yes, once. The EPA recommends testing every home regardless of area. A short-term kit costs little and settles the question for your house; Cape Coral's low predicted average describes the typical home, not yours.
What does EPA Radon Zone 3 mean for Cape Coral?: Cape Coral sits mainly in Lee 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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