Radon levels in Lorain County, Ohio

ModerateEPA Zone 2

Predicted long-term basement average of 2.1 pCi/L (model estimate) across 14 ZIP codes - close to the US average of 1.8, about 26% below the Ohio average of 2.8. Ranked #81 of 88 Ohio counties.

Test Lorain County, OH - the EPA says "consider fixing" in this range

The predicted basement average here is 2.1 pCi/L, in the 2-4 pCi/L band where the EPA recommends considering mitigation. Plenty of individual homes in a moderate area test above 4. Start with a short-term test; if it comes back at 2 or higher, follow up with a long-term test or a continuous monitor.

Already tested at 4 pCi/L or higher? Find a certified mitigation professional (EPA). A mitigation system typically runs $800-$2,500 installed.

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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.

2.1 ± 0.07

pCi/L predicted basement mean (model SD)

1.2 ± 0.07

pCi/L predicted upstairs (above-ground) mean

1.5-3.1

range of ZIP-level basement predictions in the county

What this means for Lorain

The typical Lorain County home is predicted in the 2-4 pCi/L band. The EPA's guidance for this range is to consider fixing, because there is no known safe level and roughly one home in several in a moderate area will test above 4.

The 1993 EPA zone (2) and the 2001-2021 model agree for Lorain. County figures weight each ZIP by its 2010 Census population, so they describe where people live rather than empty land.

Comparable Ohio counties: Ashtabula County (2.1), Mahoning County (2.1), Ottawa County (2.0), Fulton County (2.2). The state's highest is Knox County at 5.8 pCi/L.

ZIP codes in Lorain County

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

ZIPBasementUpstairsGrade
440352.0 ± 0.061.2Low
440521.5 ± 0.060.8Low
440392.0 ± 0.081.3Low
440122.3 ± 0.091.2Moderate
440113.1 ± 0.121.2Moderate
440012.5 ± 0.071.2Moderate
440551.5 ± 0.070.9Low
440532.0 ± 0.101.1Low
440442.1 ± 0.061.4Moderate
440542.1 ± 0.091.2Moderate
440742.2 ± 0.061.3Moderate
440902.3 ± 0.051.5Moderate
440282.0 ± 0.081.4Moderate
440502.2 ± 0.061.2Moderate

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.

Lorain County radon questions

Is radon high in Lorain County, Ohio?
Moderate. The model predicts a long-term basement average of 2.1 pCi/L in Lorain County (close to the US average of 1.8 and about 26% below the Ohio average of 2.8). That is in the 2-4 pCi/L range where the EPA recommends considering mitigation. Ranked 81 of 88 Ohio counties.
Should I test for radon in Lorain County?
Yes, soon. With a predicted average of 2.1 pCi/L, many homes in Lorain County will test above the 4 pCi/L action level. Use a short-term kit first; if it reads 2 or higher, confirm with a long-term test or continuous monitor before deciding on mitigation.
What does EPA Radon Zone 2 mean for Lorain County?
Zone 2 - moderate potential (2-4 pCi/L). The zone map dates from 1993 and classifies whole counties. The 2001-2021 model agrees with the zone here. Neither replaces a test of your own home.
How much does radon mitigation cost in Lorain County?
A standard active sub-slab depressurization system typically runs $800-$2,500 installed nationally; Ohio 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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