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Radon Levels in Coshocton County, Ohio

EPA puts Coshocton County in Zone 1, its highest radon zone, and high results are common there: 58.9% of the 112 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

    58.9%

    6.6 pts above OH

    Coshocton
    58.9%
    Ohio
    52.3%

    112 tests, 2008 to 2017

  • Median result

    5.1pCi/L

    Action level reached

    Coshocton
    5.1 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    112

    61st of 79 by tests

    Coshocton
    112
    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

    30 of 79

    Middle half

    Coshocton
    58.9%
    Pickaway
    81.4%

    By share, of 79 with 30+ tests

Read a result for Coshocton County

Starts at Coshocton County's median, 5.1 pCi/L

5.1pCi/L

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

EPA’s reading of 5.1 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. Coshocton County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Coshocton County, At a glance

Coshocton County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

EPA puts all of Coshocton 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 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

Reported results by concentration band, Coshocton County, 2008 to 2017, laboratory
Under 2 pCi/L: 16%2 to 4 pCi/L: 25%4 pCi/L and above: 59%

Of 112 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Coshocton County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L1816.1%
2 to 4 pCi/L2825.0%
4 pCi/L and above6658.9%
What these figures count

These are the 112 tests reported to CDC for Coshocton 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

Coshocton County, Compared

Coshocton County radon figures, compared

Calculated by Radon411

More than half: 58.9% of the 112 radon tests reported to CDC for Coshocton County over the 2008 to 2017 laboratory totals read at least 4 pCi/L. That places it 30th of 79 Ohio counties with 30 or more tests for the same period. That is 6.6 points above the 52.3% pooled from 88 Ohio counties.

The median result, 5.1 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 164.0 pCi/L. The rest split 16.1% under 2 pCi/L and 25.0% from 2 to 4 (Ohio: 23.1% and 24.6%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 58.9% share point the same way here.

4 of its 6 bordering counties with figures ran higher, led by Knox County at 72.0%; Guernsey County reported 44.4%. 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 Coshocton County went from 102 tests (2005 to 2014) to 112 (2008 to 2017), the share going from 62.7% to 58.9%.

Nationally, every county with a figure for the same period pools to 35.7%; Coshocton County sits 23.2 points above it.

Coshocton County against Ohio, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Coshocton County
Coshocton County11258.9%5.1 pCi/LThis county
Ohio, pooled88 counties, pooled98,84052.3%Not pooled−6.6 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled−23.2 points
Pickaway Countyhighest in the state18381.4%9.5 pCi/L+22.5 points
Cuyahoga Countylowest in the state10,09221.7%2.0 pCi/L−37.2 points
Knox County, OHborders it1,53072.0%8.1 pCi/L+13.1 points
Licking County, OHborders it4,69471.2%7.0 pCi/L+12.3 points
Tuscarawas County, OHborders it54766.4%5.6 pCi/L+7.5 points
Holmes County, OHborders it6764.2%5.8 pCi/L+5.3 points
Muskingum County, OHborders it39156.3%4.9 pCi/L−2.6 points
Guernsey County, OHborders it11744.4%3.6 pCi/L−14.5 points
Where Coshocton County's reported results fell, 2008 to 2017, laboratory, beside Ohio and the United States
ResultCoshocton County testsCoshocton County shareOhio shareU.S. shareAgainst Ohio
Under 2 pCi/L1816.1%23.1%39.6%−7.0 points
2 to 4 pCi/L2825.0%24.6%24.7%+0.4 points
4 pCi/L and above6658.9%52.3%35.7%+6.6 points
Coshocton 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
Shelby County25 of 7924860.1%5.2 pCi/L
Putnam County26 of 799459.6%4.8 pCi/L
Crawford County27 of 7921059.5%4.7 pCi/L
Huron County28 of 7979659.4%4.9 pCi/L
Sandusky County29 of 7964959.2%5.0 pCi/L
Coshocton County30 of 7911258.9%5.1 pCi/L
Seneca County31 of 7954058.9%4.9 pCi/L
Greene County32 of 792,60258.6%4.9 pCi/L
Monroe County33 of 794858.3%5.0 pCi/L
Mercer County34 of 7914957.7%5.1 pCi/L
Clark County35 of 791,44757.5%4.9 pCi/L
Coshocton County ten-year laboratory totals, against Ohio's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestOhio, pooledChange from the row before
2008 to 201711258.9%5.1 pCi/L164.0 pCi/L52.3%−0.4 points
2007 to 201611359.3%5.1 pCi/L164.0 pCi/L52.8%−3.0 points
2006 to 201510662.3%5.3 pCi/L87.4 pCi/L52.9%−0.4 points
2005 to 201410262.7%5.3 pCi/L87.4 pCi/L52.4%First on file

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

Coshocton County, Geology

The ground under Coshocton County

Predicted

USGS's geologic map puts all of Coshocton County's mapped land in one class: high radon potential. The map puts 92.5% of Coshocton County in the area it calls Area of Elevated Radioactivity and 7.5% in Glaciated Plateau. USGS gives both a radon index of 12, in the high band (12 to 17).

USGS's geologic areas under Coshocton County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Area of Elevated RadioactivityPennsylvanian shale, sandstone, coal, and limestone.High1292.5%
Glaciated PlateauPre-Wisconsin glacial deposits derived from high radioactivity marine black shale.High127.5%

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

Coshocton County beside the ground around it

Coshocton County has more high-potential ground than Ohio as a whole: 100% of its land against 62.8%. Of the 6 counties that border it, none has as large a share of high-potential ground; Holmes County comes nearest at 100%.

Share of land by USGS radon potential: Coshocton County, the 6 counties bordering it and Ohio
AreaEPA zoneLow potentialModerate potentialHigh potential
Coshocton CountyZone 1NoneNone100%
Holmes CountyZone 1NoneNone100%
Muskingum CountyZone 1None28.5%71.5%
Tuscarawas CountyZone 1NoneNone100%
Knox CountyZone 1NoneNone100%
Guernsey CountyZone 1None14.3%85.7%
Licking CountyZone 1NoneNone100%
Ohio88 counties, pooled by land areaVariesNone37.2%62.8%

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

Local help

Coshocton County, Local resources

Radon testing and mitigation in Coshocton County

Listed radon businesses with an address in Coshocton County:

Listed radon professionals by town: Coshocton, West Lafayette

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

Coshocton County, Questions

Questions about radon in Coshocton County

Are radon levels high in Coshocton County?

Over the 2008 to 2017 laboratory totals, 58.9% of the radon tests reported to CDC for Coshocton County, Ohio were at or above 4 pCi/L, and the median reported pre-mitigation result was 5.1 pCi/L. Of 79 Ohio counties with 30 or more tests for the same period, 29 reported a higher share; pooled, the state comes to 52.3%.

Which counties border Coshocton County?

Coshocton County borders 6 counties: Holmes County, Muskingum County, Tuscarawas County, Knox County, Guernsey County and Licking County.

Products

Coshocton County, Products

Testing a home in Coshocton County

In Coshocton County, 58.9% of 112 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 Coshocton 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

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

Explore

Coshocton County, Bordering counties

Counties bordering Coshocton County

Calculated by Radon411

Coshocton County, Cities and towns

Cities and towns in Coshocton County

The Census Bureau estimates 37,188 residents in Coshocton County for July 1, 2025, 598 more than in 2020 (+1.6%). That works out to 66 people per square mile of land. Its largest town, Coshocton, has 11,169 residents, 30.0% of the total. Reported testing is thin here: 112 tests over 2008 to 2017, or 3.0 for every 1,000 residents (2025 estimate), where Ohio as a whole comes to 8.3.

From Coshocton to Nellie, CDC publishes no figure by town: each reads Coshocton County's.

The cities and towns in Coshocton County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Coshocton11,169+1.2%30.0%
West Lafayette2,430+1.3%6.5%
Balticextends beyond Coshocton County848+0.5%Counted whole
Warsaw662+2.8%1.8%
Conesville331+1.2%0.9%
Plainfield151+5.6%0.4%
Nellie118+1.7%0.3%

7 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 Coshocton County is counted whole, so it has no share.

Coshocton County, Homes

Homes in Coshocton County

Coshocton County is a place of houses on their own lots: 76% of its 16,321 homes are detached single-family houses, against 69% across Ohio. Half of its homes were built before 1968, close to Ohio's 1970: 43% date from before 1960 and 16% from 2000 or later. 73% of occupied homes are lived in by their owner (Ohio: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Coshocton County, Ohio, 2019 to 2023
HomesCoshocton CountyOhio
Housing units16,3215,271,573
Detached houses76%69%
In buildings of 5 or more5%15%
Mobile homes14%4%
Built before 196043%38%
Built since 200016%16%
Middle year built19681970
Owner-occupied73%67%

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