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Radon Levels in Morgan County, Ohio

EPA puts Morgan County in Zone 2, its middle radon zone, and only 10 radon tests from it are on file with CDC (2008 to 2017, laboratory totals). Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

  • Highest bordering

    56.3%

    Muskingum County

    Muskingum
    56.3%
    Noble
    31.0%

    5 of 5 neighbours have 30+ tests, 2008 to 2017

  • Nearest county

    48.9%

    Perry County, 22 miles

    Perry
    48.9%
    Ohio
    52.3%

    Share at 4+ pCi/L, 90 tests, 2008 to 2017

  • Ground above low

    100.0%

    0.1 pts above Ohio

    Morgan
    100.0%
    Ohio
    99.9%

    Share of land USGS rates moderate or high potential

  • Tests reported

    11

    Too few for a share

    Morgan
    11
    Needed
    30

    2006 to 2015, laboratory

  • 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

Read a result for Morgan County

Starts at EPA's action level

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.

The data

Morgan County, At a glance

Morgan County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Morgan 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: Moderate across 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

CDC holds 10 reported tests for Morgan County over the 2008 to 2017 laboratory totals, with a median of 3.3 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Morgan County beside the counties around it is how this page reads it.

What these figures count

Only 10 tests were reported to CDC for Morgan County over 2008 to 2017 (laboratory totals), and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor 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

Morgan County, Compared

Morgan County radon figures, compared

Calculated by Radon411

CDC's largest figure for Morgan County rests on 11 tests over the 2006 to 2015 laboratory totals, 3 of them at or above 4 pCi/L, so each test moves its share by 9.1 points and no rank or comparison is drawn from it. Results reached as high as 9.5 pCi/L, with a middle value of 3.4 pCi/L.

Of the counties bordering it, 5 have a figure over the 2008 to 2017 laboratory totals: Muskingum County reported the largest share at or above 4 pCi/L, 56.3%, and Noble County the smallest, 31.0%, with Perry County at 48.9%, Washington County at 38.1% and Athens County at 38.1% between. Farther out, Hocking County (35 miles away) at 53.3%, Guernsey County (35 miles away) at 44.4% and Monroe County (42 miles away) at 58.3% have figures too. Pooled across 88 Ohio counties, 52.3% of reported tests reached that level; across every county in the country with a figure, 35.7%.

Statewide for the same period, Pickaway County reported the highest share (81.4%) and Cuyahoga County the lowest (21.7%). EPA's 1993 map puts Morgan County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.

Ohio, the United States and the counties around Morgan County, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedian
Ohio, pooled88 counties, pooled98,84052.3%Not pooled
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled
Pickaway Countyhighest in the state18381.4%9.5 pCi/L
Cuyahoga Countylowest in the state10,09221.7%2.0 pCi/L
Muskingum County, OHborders it39156.3%4.9 pCi/L
Perry County, OHborders it9048.9%3.8 pCi/L
Washington County, OHborders it34938.1%3.1 pCi/L
Athens County, OHborders it31838.1%3.1 pCi/L
Noble County, OHborders it4231.0%2.2 pCi/L
The nearest Ohio counties to Morgan County with 30 or more tests, 2008 to 2017, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Perry County22 mi9048.9%3.8 pCi/L
Washington County22 mi34938.1%3.1 pCi/L
Athens County22 mi31838.1%3.1 pCi/L
Noble County23 mi4231.0%2.2 pCi/L
Muskingum County24 mi39156.3%4.9 pCi/L
Hocking County35 mi6053.3%4.0 pCi/L
Guernsey County35 mi11744.4%3.6 pCi/L
Monroe County42 mi4858.3%5.0 pCi/L
Morgan County ten-year laboratory totals, against Ohio's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestOhio, pooledChange from the row before
2008 to 20171030.0%3.3 pCi/L9.5 pCi/L52.3%Level
2007 to 20161030.0%3.3 pCi/L9.5 pCi/L52.8%+2.7 points
2006 to 20151127.3%3.4 pCi/L9.5 pCi/L52.9%+5.1 points
2005 to 2014922.2%3.4 pCi/L8.4 pCi/L52.4%First on file

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

Morgan County, Geology

The ground under Morgan County

Predicted

USGS's geologic map puts all of Morgan County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Unglaciated Plateau, to which USGS gives a radon index of 11, in the moderate band (9 to 11).

USGS's geologic areas under Morgan County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Unglaciated PlateauMississippian through Permian limestone, dolomite, and shale.Moderate11100%

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

Morgan County beside the ground around it

Across Ohio 62.8% of the land is rated high; none of Morgan County's is. Of the 5 counties that border it, 2 have more high-potential ground, Muskingum County the most at 71.5%.

Share of land by USGS radon potential: Morgan County, the 5 counties bordering it and Ohio
AreaEPA zoneLow potentialModerate potentialHigh potential
Morgan CountyZone 2None100%None
Noble CountyZone 2None100%None
Washington CountyZone 2None100%None
Perry CountyZone 1None41.6%58.4%
Athens CountyZone 2None100%None
Muskingum CountyZone 1None28.5%71.5%
Ohio88 counties, pooled by land areaVariesNone37.2%62.8%

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

What it means

Morgan County, Questions

Questions about radon in Morgan County

Are radon levels high in Morgan County?

Over the 2008 to 2017 laboratory totals, 30.0% of the radon tests reported to CDC for Morgan County, Ohio were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.3 pCi/L. Of the counties bordering it, 5 have a figure over the 2008 to 2017 laboratory totals: Muskingum County reported the largest share at or above 4 pCi/L, 56.3%, and Noble County the smallest, 31.0%, with Perry County at 48.9%, Washington County at 38.1% and Athens County at 38.1% between.

Which counties border Morgan County?

Morgan County borders 5 counties: Noble County, Washington County, Perry County, Athens County and Muskingum County.

Products

Morgan County, Products

Testing a home in Morgan County

No CDC figure names Morgan County; the nearest county with one, Perry County (22 miles away), reported 48.9% of its tests at or above 4 pCi/L over the 2008 to 2017 laboratory totals, the only reading nearby until a test of this home. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Morgan County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Morgan County homes, compared

Explore

Morgan County, Bordering counties

Counties bordering Morgan County

Calculated by Radon411

Morgan County, Cities and towns

Cities and towns in Morgan County

About 13,626 people live in Morgan County by the Census Bureau's estimate for July 1, 2025, 130 fewer than in 2020 (−0.9%). That works out to 33 people per square mile of land. No town dominates: McConnelsville, the largest, has 1,637 residents, 12.0% of the total. Together its 4 incorporated places hold 21.6% of those residents; the other 78.4% live outside any of them. Reported testing is thin here: 11 tests over 2006 to 2015, or 0.8 for every 1,000 residents (2025 estimate), where Ohio as a whole comes to 7.6.

From McConnelsville to Chesterhill, CDC publishes no figure by town: each reads Morgan County's.

The cities and towns in Morgan County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
McConnelsville1,637−1.4%12.0%
Malta559−0.9%4.1%
Stockport472−1.9%3.5%
Chesterhill269−1.5%2.0%

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).

Morgan County, Homes

Homes in Morgan County

Morgan County is a place of houses on their own lots: 76% of its 7,311 homes are detached single-family houses, against 69% across Ohio. Half of its homes were built before 1975, close to Ohio's 1970: 35% date from before 1960 and 21% from 2000 or later. Owners live in 77% of the occupied homes (Ohio: 67%), so for most households a test and a fix are their own to order.

Homes in Morgan County, Ohio, 2019 to 2023
HomesMorgan CountyOhio
Housing units7,3115,271,573
Detached houses76%69%
In buildings of 5 or more2%15%
Mobile homes19%4%
Built before 196035%38%
Built since 200021%16%
Middle year built19751970
Owner-occupied77%67%

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