Is radon high in Toledo, Ohio?

Low. Averaging the model's ZIP-code predictions across Toledo (weighted by how much of the city each ZIP covers) gives a long-term basement mean of 1.1 pCi/L - about 38% below the US average of 1.8 and about 60% below the Ohio average of 2.8. That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. Toledo ranks 27 of 27 Ohio cities on this site.

Which Toledo ZIP codes have the highest radon?

Predictions for the 14 modeled ZIP codes in Toledo range from 0.8 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 Toledo?

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

What does EPA Radon Zone 2 mean for Toledo?

Toledo sits mainly in Lucas 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 1.1 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 Toledo, Ohio

LowEPA Zone 2

Predicted long-term basement average of 1.1 pCi/L (model estimate) across the 14 modeled ZIP codes in Toledo - about 38% below the US average of 1.8, about 60% below the Ohio average of 2.8. Ranked #27 of 27 Ohio cities on this site. Most of the city lies in Lucas County.

Test Toledo, OH once anyway - radon varies house to house

The predicted basement average here is 1.1 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.

1.1 ± 0.10

pCi/L predicted basement mean (model SD)

0.8 ± 0.07

pCi/L predicted upstairs (above-ground) mean

0.8-1.6

range of ZIP-level basement predictions in the city

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

What this means for Toledo

The typical Toledo home is predicted below 2 pCi/L, the lowest band. That describes the average house; the ZIP-level predictions inside the city still span 0.8 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 Lucas County as Zone 2 while the newer model predicts 1.1 pCi/L for Toledo; where they disagree, we grade on the model but show both.

Comparable Ohio cities: Lakewood (1.2), Euclid (1.3), Cleveland (1.3), Cleveland Heights (1.5).

ZIP codes in Toledo

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
43612	14%	1.1 ± 0.10	0.7	Low
43615	13%	1.4 ± 0.07	1.0	Low
43614	11%	1.0 ± 0.10	0.9	Low
43607	9%	1.3 ± 0.07	0.8	Low
43605	9%	1.1 ± 0.09	0.7	Low
43611	8%	1.1 ± 0.15	0.9	Low
43613	8%	1.2 ± 0.07	0.8	Low
43606	7%	0.8 ± 0.21	0.7	Low
43609	6%	1.1 ± 0.07	0.7	Low
43623	5%	1.3 ± 0.06	1.0	Low
43608	4%	1.0 ± 0.12	0.7	Low
43604	4%	1.0 ± 0.14	0.6	Low
43610	2%	1.0 ± 0.21	0.7	Low
43620	1%	1.6 ± 0.13	0.7	Low

Testing help in Ohio

Ohio's radon program page is at odh.ohio.gov; it lists testing and certified-mitigator guidance. 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.

Toledo radon questions

Is radon high in Toledo, Ohio?: Low. Averaging the model's ZIP-code predictions across Toledo (weighted by how much of the city each ZIP covers) gives a long-term basement mean of 1.1 pCi/L - about 38% below the US average of 1.8 and about 60% below the Ohio average of 2.8. That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. Toledo ranks 27 of 27 Ohio cities on this site.
Which Toledo ZIP codes have the highest radon?: Predictions for the 14 modeled ZIP codes in Toledo range from 0.8 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 Toledo?: Yes, once. The EPA recommends testing every home regardless of area. A short-term kit costs little and settles the question for your house; Toledo's low predicted average describes the typical home, not yours.
What does EPA Radon Zone 2 mean for Toledo?: Toledo sits mainly in Lucas 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 1.1 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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