Is radon high in Polk County, Florida?

Low. The model predicts a long-term basement average of 1.3 pCi/L in Polk County (about 27% 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. Ranked 33 of 67 Florida counties.

Should I test for radon in Polk County?

Yes, once. The EPA recommends testing every home regardless of area, and the model's ZIP-level predictions in Polk County already range from 1.1 to 1.6 pCi/L. A short-term kit costs little and settles the question for your house.

What does EPA Radon Zone 2 mean for Polk County?

Zone 2 - moderate potential (2-4 pCi/L). The zone map dates from 1993 and classifies whole counties. The newer model's predicted average of 1.3 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.

How much does radon mitigation cost in Polk County?

A standard active sub-slab depressurization system typically runs $800-$2,500 installed nationally; Florida quotes vary with foundation type (slab, crawlspace, basement), home size and local labor. Get two or three bids from certified mitigators listed by your state radon program or the EPA's find-a-professional page.

Radon levels in Polk County, Florida

LowEPA Zone 2

Predicted long-term basement average of 1.3 pCi/L (model estimate) across 30 ZIP codes - about 27% below the US average of 1.8, close to the Florida average of 1.3. Ranked #33 of 67 Florida counties.

Test Polk County, FL once anyway - radon varies house to house

The predicted basement average here is 1.3 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.

1.3 ± 0.07

pCi/L predicted basement mean (model SD)

1.0 ± 0.13

pCi/L predicted upstairs (above-ground) mean

1.1-1.6

range of ZIP-level basement predictions in the county

What this means for Polk

The typical Polk County home is predicted below 2 pCi/L, the lowest band. That is the best case an area can show - but it describes the average house, and the ZIP-level predictions within the county still span 1.1 to 1.6 pCi/L.

Note that the EPA classifies Polk County as Zone 2 while the newer model predicts 1.3 pCi/L. The zone map predates two decades of test data; where they disagree, we grade on the model but show both. County figures weight each ZIP by its 2010 Census population, so they describe where people live rather than empty land.

Comparable Florida counties: Collier County (1.3), Manatee County (1.3), Leon County (1.3), Flagler County (1.3). The state's highest is Jefferson County at 1.6 pCi/L.

ZIP codes in Polk County

Predicted basement and upstairs means by ZIP (model estimate). ZIPs whose land is mostly in this county.

ZIP	Basement	Upstairs	Grade
33810	1.4 ± 0.07	1.1	Low
33880	1.2 ± 0.08	0.7	Low
33844	1.2 ± 0.07	0.6	Low
33801	1.2 ± 0.08	0.7	Low
33813	1.6 ± 0.06	1.8	Low
34759	1.3 ± 0.07	0.7	Low
33881	1.1 ± 0.07	0.6	Low
33809	1.5 ± 0.06	1.2	Low
33823	1.2 ± 0.07	0.7	Low
33884	1.3 ± 0.07	0.8	Low
33830	1.5 ± 0.05	1.5	Low
33803	1.4 ± 0.06	1.2	Low
33805	1.3 ± 0.07	1.0	Low
33860	1.6 ± 0.05	1.5	Low
33811	1.6 ± 0.06	1.5	Low
33837	1.4 ± 0.06	0.8	Low
33898	1.4 ± 0.07	0.7	Low
33815	1.2 ± 0.07	1.0	Low
33897	1.4 ± 0.06	0.7	Low
33812	1.6 ± 0.05	1.5	Low
33868	1.3 ± 0.07	0.9	Low
33853	1.1 ± 0.08	0.8	Low
33843	1.1 ± 0.07	0.7	Low
33859	1.2 ± 0.07	0.8	Low
33841	1.5 ± 0.06	1.2	Low
33850	1.2 ± 0.07	0.7	Low
33838	1.2 ± 0.08	0.7	Low
33827	1.4 ± 0.08	1.0	Low
33839	1.2 ± 0.08	0.7	Low
33849	1.4 ± 0.06	1.2	Low

If your test comes back at 4 pCi/L or higher

Mitigation is a routine job: a fan-driven pipe that vents soil gas from under the slab to above the roofline, typically $800-$2,500 installed (typical range; local quotes vary). Use certified professionals: EPA find-a-professional. Read the full mitigation guide.

Polk County radon questions

Is radon high in Polk County, Florida?: Low. The model predicts a long-term basement average of 1.3 pCi/L in Polk County (about 27% 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. Ranked 33 of 67 Florida counties.
Should I test for radon in Polk County?: Yes, once. The EPA recommends testing every home regardless of area, and the model's ZIP-level predictions in Polk County already range from 1.1 to 1.6 pCi/L. A short-term kit costs little and settles the question for your house.
What does EPA Radon Zone 2 mean for Polk County?: Zone 2 - moderate potential (2-4 pCi/L). The zone map dates from 1993 and classifies whole counties. The newer model's predicted average of 1.3 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.
How much does radon mitigation cost in Polk County?: A standard active sub-slab depressurization system typically runs $800-$2,500 installed nationally; Florida quotes vary with foundation type (slab, crawlspace, basement), home size and local labor. Get two or three bids from certified mitigators listed by your state radon program or the EPA's find-a-professional page.

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