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Radon Levels in Hocking County, Ohio

EPA puts Hocking County in Zone 2, its middle radon zone, and high results are common there: 53.3% of the 60 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

How to test this homeFind a certified tester

  • Share at 4+ pCi/L

    53.3%

    1.0 pts above OH

    Hocking
    53.3%
    Ohio
    52.3%

    60 tests, 2008 to 2017

  • Median result

    4.0pCi/L

    Action level reached

    Hocking
    4.0 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    60

    73rd of 79 by tests

    Hocking
    60
    Franklin
    16,142

    Reported to CDC before any fix, 2008 to 2017

  • EPA radon zone

    Zone 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    EPA predicts 2 to 4 pCi/L indoors

  • Rank in Ohio

    43 of 79

    Middle half

    Hocking
    53.3%
    Pickaway
    81.4%

    By share, of 79 with 30+ tests

Read a result for Hocking County

Starts at Hocking County's median, 4.0 pCi/L

4.0pCi/L

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

EPA’s reading of 4.0 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. Hocking County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Hocking County, At a glance

Hocking County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Hocking County is a county: EPA's forecast for it as a whole is an average indoor of 2 to 4 pCi/L (75 to 150 Bq/m³). It describes no single address, and homes above EPA's are found in every zone, this one included.

USGS geologic potential: High across 50% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

Reported results by concentration band, Hocking County, 2008 to 2017, laboratory
Under 2 pCi/L: 28%2 to 4 pCi/L: 18%4 pCi/L and above: 54%

Of 60 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Hocking County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L1728.3%
2 to 4 pCi/L1118.3%
4 pCi/L and above3253.3%
What these figures count

These are the 60 tests reported to CDC for Hocking 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

Hocking County, Compared

Hocking County radon figures, compared

Calculated by Radon411

More than half: 53.3% of the 60 radon tests reported to CDC for Hocking County over the 2008 to 2017 laboratory totals read at least 4 pCi/L. That places it 43rd of 79 Ohio counties with 30 or more tests for the same period. That is 1.0 points above the 52.3% pooled from 88 Ohio counties.

The median result, 4.0 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 95.5 pCi/L. The rest split 28.3% under 2 pCi/L and 18.3% from 2 to 4 (Ohio: 23.1% and 24.6%). The reported tests do not follow EPA's Zone 2 label for Hocking County (predicted average between 2 and 4 pCi/L): 53.3% of them reached 4 pCi/L, fewer than that label suggests.

3 of its 5 bordering counties with figures ran higher, led by Pickaway County at 81.4%; Athens County reported 38.1%. 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 Hocking County went from 48 tests (2005 to 2014) to 60 (2008 to 2017), the share going from 52.1% to 53.3%.

Nationally, every county with a figure for the same period pools to 35.7%; Hocking County sits 17.6 points above it.

Hocking County against Ohio, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Hocking County
Hocking County6053.3%4.0 pCi/LThis county
Ohio, pooled88 counties, pooled98,84052.3%Not pooled−1.0 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled−17.6 points
Logan Countyhighest in the state75573.6%7.9 pCi/L+20.3 points
Cuyahoga Countylowest in the state10,09221.7%2.0 pCi/L−31.6 points
Pickaway County, OHborders it18381.4%9.5 pCi/L+28.1 points
Fairfield County, OHborders it1,17576.8%7.4 pCi/L+23.5 points
Ross County, OHborders it36867.1%7.0 pCi/L+13.8 points
Perry County, OHborders it9048.9%3.8 pCi/L−4.4 points
Athens County, OHborders it31838.1%3.1 pCi/L−15.2 points
Vinton County, OHborders it425.0%1.9 pCi/L−28.3 points
Where Hocking County's reported results fell, 2008 to 2017, laboratory, beside Ohio and the United States
ResultHocking County testsHocking County shareOhio shareU.S. shareAgainst Ohio
Under 2 pCi/L1728.3%23.1%39.6%+5.2 points
2 to 4 pCi/L1118.3%24.6%24.7%−6.3 points
4 pCi/L and above3253.3%52.3%35.7%+1.0 points
Hocking 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
Highland County38 of 796756.7%4.8 pCi/L
Muskingum County39 of 7939156.3%4.9 pCi/L
Pike County40 of 795756.1%4.5 pCi/L
Erie County41 of 791,65154.5%4.4 pCi/L
Butler County42 of 791,95354.3%4.4 pCi/L
Hocking County43 of 796053.3%4.0 pCi/L
Warren County44 of 792,51252.5%4.2 pCi/L
Clinton County45 of 7910352.4%4.2 pCi/L
Montgomery County46 of 792,92250.3%4.0 pCi/L
Clermont County47 of 791,36350.0%4.0 pCi/L
Harrison County48 of 794450.0%4.1 pCi/L
Hocking County ten-year laboratory totals, against Ohio's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestOhio, pooledChange from the row before
2008 to 20176053.3%4.0 pCi/L95.5 pCi/L52.3%−2.1 points
2007 to 20165655.4%4.3 pCi/L93.2 pCi/L52.8%+0.7 points
2006 to 20155354.7%4.1 pCi/L93.2 pCi/L52.9%+2.6 points
2005 to 20144852.1%4.0 pCi/L93.2 pCi/L52.4%First on file

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

Hocking County, Geology

The ground under Hocking County

Predicted

USGS's geologic map splits Hocking County: 50.2% of its land is high radon potential and 49.8% moderate. The map puts 49.8% of Hocking County in the area it calls Unglaciated Plateau and 37.9% in Mississippian Limestone, with 2 smaller areas beside them. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 14, in the high band (12 to 17).

USGS's geologic areas under Hocking County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Unglaciated PlateauMississippian through Permian limestone, dolomite, and shale.Moderate1149.8%
Mississippian LimestoneMississippian limestone exhibiting high gamma radioactivity.High1437.9%
Glaciated PlateauPre-Wisconsin glacial deposits derived from high radioactivity marine black shale.High128.8%
Till PlainsGlacial deposits underlain by Ordovician through Devonian limestone and shale.High143.5%

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

Hocking County beside the ground around it

Ohio as a whole has more high-potential ground than Hocking County: 62.8% of its land, against 50.2% here. Of the 6 counties that border it, 4 have more high-potential ground, Fairfield County the most at 100%.

Share of land by USGS radon potential: Hocking County, the 6 counties bordering it and Ohio
AreaEPA zoneLow potentialModerate potentialHigh potential
Hocking CountyZone 2None49.8%50.2%
Vinton CountyZone 2None80.7%19.3%
Perry CountyZone 1None41.6%58.4%
Fairfield CountyZone 1NoneNone100%
Athens CountyZone 2None100%None
Pickaway CountyZone 1NoneNone100%
Ross CountyZone 1NoneNone100%
Ohio88 counties, pooled by land areaVariesNone37.2%62.8%

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

Local help

Hocking County, Local resources

Radon testing and mitigation in Hocking County

What Ohio's program says
Phone
614-728-0272
Email
indoor.radon@odh.ohio.gov
Licensing of radon professionals
This program licenses companies and persons directly involved with the radon testing and mitigation industry.

What it means

Hocking County, Questions

Questions about radon in Hocking County

Are radon levels high in Hocking County?

Over the 2008 to 2017 laboratory totals, 53.3% of the radon tests reported to CDC for Hocking County, Ohio were at or above 4 pCi/L, and the median reported pre-mitigation result was 4.0 pCi/L. Of 79 Ohio counties with 30 or more tests for the same period, 42 reported a higher share; pooled, the state comes to 52.3%.

Which counties border Hocking County?

Hocking County borders 6 counties: Vinton County, Perry County, Fairfield County, Athens County, Pickaway County and Ross County.

Products

Hocking County, Products

Testing a home in Hocking County

In Hocking County, 53.3% of 60 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 52.3% pooled across Ohio. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Hocking County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Hocking County homes, compared

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Hocking County, Bordering counties

Counties bordering Hocking County

Calculated by Radon411

Hocking County, Cities and towns

Cities and towns in Hocking County

About 27,512 people live in Hocking County by the Census Bureau's estimate for July 1, 2025, 528 fewer than in 2020 (−1.9%). That works out to 65 people per square mile of land. Its largest town, Logan, has 7,164 residents, 26.0% of the total. Reported testing is thin here: 60 tests over 2008 to 2017, or 2.2 for every 1,000 residents (2025 estimate), where Ohio as a whole comes to 8.3.

From Logan to Murray City, CDC publishes no figure by town: each reads Hocking County's.

The cities and towns in Hocking County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Logan7,164−1.9%26.0%
Buchtelextends beyond Hocking County508−1.6%Counted whole
Laurelville503−3.3%1.8%
Murray City343−2.6%1.2%

4 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond Hocking County is counted whole, so it has no share.

Hocking County, Homes

Homes in Hocking County

Of Hocking County's 13,014 homes, 73% are detached houses, against 69% across Ohio; 19% are mobile homes. Much of Hocking County is recent building: 20% of its homes have gone up since 2000 and the middle year built is 1982, against 1970 for Ohio. Owners live in 79% of the occupied homes (Ohio: 67%), so for most households a test and a fix are their own to order.

Homes in Hocking County, Ohio, 2019 to 2023
HomesHocking CountyOhio
Housing units13,0145,271,573
Detached houses73%69%
In buildings of 5 or more4%15%
Mobile homes19%4%
Built before 196025%38%
Built since 200020%16%
Middle year built19821970
Owner-occupied79%67%

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