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Radon Levels in Wayne County, Ohio

EPA puts Wayne County in Zone 1, its highest radon zone, and high results are common there: 61.8% of the 1,074 radon tests reported to CDC (2008 to 2017, laboratory totals) came back at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

  • Share at 4+ pCi/L

    61.8%

    9.5 pts above OH

    Wayne
    61.8%
    Ohio
    52.3%

    1,074 tests, 2008 to 2017

  • Median result

    4.9pCi/L

    Action level reached

    Wayne
    4.9 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    1,074

    27th of 79 by tests

    Wayne
    1,074
    Franklin
    16,142

    Reported to CDC before any fix, 2008 to 2017

  • EPA radon zone

    Zone 1

    Highest potential

    1. Zone 1
    2. 2
    3. 3

    1 highest, 3 lowest

    EPA predicts over 4 pCi/L indoors

  • Rank in Ohio

    21 of 79

    Middle half

    Wayne
    61.8%
    Pickaway
    81.4%

    By share, of 79 with 30+ tests

Read a result for Wayne County

Starts at Wayne County's median, 4.9 pCi/L

4.9pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 4.9 pCi/L

At or above 4 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. Wayne County's median reported result, 2008 to 2017.

The data

Wayne County, At a glance

Wayne County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

EPA puts all of Wayne County in and predicts an average indoor of greater than 4 pCi/L (greater than 150 Bq/m³) across the county. That is one forecast for the whole county, not a reading of any address in it; homes above EPA's turn up in all three zones.

USGS geologic potential: High across 65% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Wayne County, 2008 to 2017, laboratory

Reported results by concentration band, Wayne County, 2008 to 2017, laboratory
Under 2 pCi/L: 15%2 to 4 pCi/L: 23%4 pCi/L and above: 62%

Of 1,074 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Wayne County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L15914.8%
2 to 4 pCi/L25123.4%
4 pCi/L and above66461.8%
What these figures count

These are the 1,074 tests reported to CDC for Wayne County over 2008 to 2017 (laboratory totals), many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.

Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).

How to read these figures

Wayne County, Compared

Wayne County radon figures, compared

Calculated by Radon411

More than half: 61.8% of the 1,074 radon tests reported to CDC for Wayne County over the 2008 to 2017 laboratory totals read at least 4 pCi/L. That places it 21st of 79 Ohio counties with 30 or more tests for the same period. That is 9.5 points above the 52.3% pooled from 88 Ohio counties.

The median result, 4.9 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 504.7 pCi/L. The rest split 14.8% under 2 pCi/L and 23.4% from 2 to 4 (Ohio: 23.1% and 24.6%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 61.8% share point the same way here.

2 of its 5 bordering counties with figures ran higher, led by Holmes County at 64.2%; Summit County reported 38.7%. Statewide for the same period, Pickaway County reported the highest share (81.4%) and Cuyahoga County the lowest (21.7%).

CDC's ten-year totals for Wayne County went from 813 tests (2005 to 2014) to 1,074 (2008 to 2017), the share going from 61.9% to 61.8%.

Nationally, every county with a figure for the same period pools to 35.7%; Wayne County sits 26.1 points above it. CDC also counts 107 tests taken after mitigation in Wayne County for the same period: tests in homes where a fix was already in.

Wayne County against Ohio, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Wayne County
Wayne County1,07461.8%4.9 pCi/LThis county
Ohio, pooled88 counties, pooled98,84052.3%Not pooled−9.5 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled−26.1 points
Pickaway Countyhighest in the state18381.4%9.5 pCi/L+19.6 points
Cuyahoga Countylowest in the state10,09221.7%2.0 pCi/L−40.1 points
Holmes County, OHborders it6764.2%5.8 pCi/L+2.4 points
Ashland County, OHborders it34062.9%5.4 pCi/L+1.1 points
Stark County, OHborders it3,31760.1%4.9 pCi/L−1.7 points
Medina County, OHborders it2,13943.4%3.5 pCi/L−18.4 points
Summit County, OHborders it6,48638.7%3.1 pCi/L−23.1 points
Where Wayne County's reported results fell, 2008 to 2017, laboratory, beside Ohio and the United States
ResultWayne County testsWayne County shareOhio shareU.S. shareAgainst Ohio
Under 2 pCi/L15914.8%23.1%39.6%−8.3 points
2 to 4 pCi/L25123.4%24.6%24.7%−1.2 points
4 pCi/L and above66461.8%52.3%35.7%+9.5 points
Wayne County ranked among the 79 Ohio counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Holmes County16 of 796764.2%5.8 pCi/L
Darke County17 of 7927063.7%5.6 pCi/L
Ashland County18 of 7934062.9%5.4 pCi/L
Preble County19 of 7921262.7%5.5 pCi/L
Richland County20 of 791,32762.2%5.2 pCi/L
Wayne County21 of 791,07461.8%4.9 pCi/L
Henry County22 of 793461.8%5.3 pCi/L
Union County23 of 791,28560.2%4.8 pCi/L
Stark County24 of 793,31760.1%4.9 pCi/L
Shelby County25 of 7924860.1%5.2 pCi/L
Putnam County26 of 799459.6%4.8 pCi/L
Wayne County ten-year laboratory totals, against Ohio's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestOhio, pooledChange from the row before
2008 to 20171,07461.8%4.9 pCi/L504.7 pCi/L52.3%−0.1 points
2007 to 20161,02461.9%5.0 pCi/L504.7 pCi/L52.8%−0.6 points
2006 to 201592162.5%5.1 pCi/L377.6 pCi/L52.9%+0.6 points
2005 to 201481361.9%5.1 pCi/L312.8 pCi/L52.4%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

Wayne County, Geology

The ground under Wayne County

Predicted

USGS's geologic map splits Wayne County: 65.4% of its land is high radon potential and 34.6% moderate. The map puts 65.4% of Wayne County in the area it calls Area of Elevated Radioactivity and 34.6% in Glaciated Plateau. USGS gives the first a radon index of 12, in the high band (12 to 17), and the second 11, in the moderate band (9 to 11).

USGS's geologic areas under Wayne County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Area of Elevated RadioactivityPennsylvanian shale, sandstone, coal, and limestone.High1265.4%
Glaciated PlateauDevonian, Mississippian and Permian carbonates and shales.Moderate1134.6%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Wayne County beside the ground around it

On high-potential ground Wayne County is close to Ohio as a whole: 65.4% of its land against 62.8%. Of the 5 counties that border it, 2 have more high-potential ground, Holmes County the most at 100%.

Share of land by USGS radon potential: Wayne County, the 5 counties bordering it and Ohio
AreaEPA zoneLow potentialModerate potentialHigh potential
Wayne CountyZone 1None34.6%65.4%
Holmes CountyZone 1NoneNone100%
Ashland CountyZone 1None31.5%68.5%
Medina CountyZone 2None100%None
Stark CountyZone 1None56.2%43.8%
Summit CountyZone 1None100%None
Ohio88 counties, pooled by land areaVariesNone37.2%62.8%

The map rates the ground, not the air in any home.

What it means

Wayne County, Questions

Questions about radon in Wayne County

Are radon levels high in Wayne County?

Over the 2008 to 2017 laboratory totals, 61.8% of the radon tests reported to CDC for Wayne County, Ohio were at or above 4 pCi/L, and the median reported pre-mitigation result was 4.9 pCi/L. Of 79 Ohio counties with 30 or more tests for the same period, 20 reported a higher share; pooled, the state comes to 52.3%.

Which counties border Wayne County?

Wayne County borders 5 counties: Holmes County, Ashland County, Medina County, Stark County and Summit County.

Products

Wayne County, Products

Testing a home in Wayne County

In Wayne County, 61.8% of 1,074 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 52.3% pooled across Ohio. In Zone 1 the year-round level in Wayne County is the one to know: a long-term test (more than 90 days) or a monitor, with a short-term kit for a first answer.

Test kits and monitors3

See every kit and monitor

Wayne County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Wayne County

Explore

Wayne County, Bordering counties

Counties bordering Wayne County

Calculated by Radon411

Wayne County, Cities and towns

Cities and towns in Wayne County

Wayne County's population has barely moved since 2020: 116,758 residents on July 1, 2025 against 116,899 then, by the Census Bureau's estimates. That works out to 210 people per square mile of land. Its largest town, Wooster, has 27,115 residents, 23.2% of the total. CDC's 1,074 reported tests for 2008 to 2017 work out to 9.2 per 1,000 residents (2025 estimate), close to Ohio's 8.3.

From Wooster to Congress, CDC publishes no figure by town: each reads Wayne County's.

The 12 largest cities and towns in Wayne County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Wooster27,115−0.5%23.2%
Nortonextends beyond Wayne County11,493−1.4%Counted whole
Orrville8,461Level7.2%
Rittmanextends beyond Wayne County6,120−0.3%Counted whole
Doylestown3,085+1.0%2.6%
Crestonextends beyond Wayne County2,143+0.3%Counted whole
Dalton1,921−0.3%1.6%
Shreve1,495+0.1%1.3%
West Salem1,430−0.1%1.2%
Smithville1,333−0.4%1.1%
Apple Creek1,183−0.5%1.0%
Marshallville793+0.1%0.7%
  • Fredericksburg
  • Burbank
  • Mount Eaton
  • Congress

16 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. “(part)” marks a place that extends into another county. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond Wayne County is counted whole, so it has no share.

Wayne County, Homes

Homes in Wayne County

Wayne County is a place of houses on their own lots: 76% of its 46,804 homes are detached single-family houses, against 69% across Ohio. Half of its homes were built before 1975, close to Ohio's 1970: 31% date from before 1960 and 17% from 2000 or later. Owners live in 76% of the occupied homes (Ohio: 67%), so for most households a test and a fix are their own to order.

Homes in Wayne County, Ohio, 2019 to 2023
HomesWayne CountyOhio
Housing units46,8045,271,573
Detached houses76%69%
In buildings of 5 or more7%15%
Mobile homes7%4%
Built before 196031%38%
Built since 200017%16%
Middle year built19751970
Owner-occupied76%67%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.