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Radon Levels in Schuyler County, Missouri

EPA puts Schuyler County in Zone 2, its middle radon zone, and only 11 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

    45.3%

    Appanoose County

    Appanoose
    45.3%
    Adair
    27.2%

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

  • Nearest county

    27.2%

    Adair County, 20 miles

    Adair
    27.2%
    Missouri
    30.6%

    Share at 4+ pCi/L, 92 tests, 2008 to 2017

  • Ground above low

    100.0%

    5.8 pts above Missouri

    Schuyler
    100.0%
    Missouri
    94.2%

    Share of land USGS rates moderate or high potential

  • Tests reported

    13

    Too few for a share

    Schuyler
    13
    Needed
    30

    2005 to 2014, 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 Schuyler 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

Schuyler County, At a glance

Schuyler County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Schuyler 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 Schuyler County, 2008 to 2017, laboratory

CDC holds 11 reported tests for Schuyler County over the 2008 to 2017 laboratory totals, with a median of 1.0 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Schuyler County beside the counties around it is how this page reads it.

What these figures count

Only 11 tests were reported to CDC for Schuyler 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

Schuyler County, Compared

Schuyler County radon figures, compared

Calculated by Radon411

CDC's largest figure for Schuyler County rests on 13 tests over the 2005 to 2014 laboratory totals, 1 of them at or above 4 pCi/L, so each test moves its share by 7.7 points and no rank or comparison is drawn from it. Results reached as high as 5.8 pCi/L, with a middle value of 1.0 pCi/L.

Of the counties bordering it, 3 have a figure over the 2008 to 2017 laboratory totals: Appanoose County, IA reported the largest share at or above 4 pCi/L, 45.3%, and Adair County the smallest, 27.2%, with Davis County, IA at 42.4% between. Farther out, Macon County (44 miles away) at 19.4%, Lewis County (49 miles away) at 32.4% and Linn County (52 miles away) at 18.9% have figures too. Pooled across 115 Missouri counties, 30.6% of reported tests reached that level; across every county in the country with a figure, 35.7%.

Statewide for the same period, Atchison County reported the highest share (69.9%) and Vernon County the lowest (8.8%). EPA's 1993 map puts Schuyler 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.

Missouri, the United States and the counties around Schuyler County, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedian
Missouri, pooled115 counties, pooled58,52530.6%Not pooled
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled
Atchison Countyhighest in the state10369.9%5.6 pCi/L
Vernon Countylowest in the state348.8%0.9 pCi/L
Appanoose County, IAborders it11745.3%3.7 pCi/L
Davis County, IAborders it8542.4%3.1 pCi/L
Putnam County, MOborders it933.3%1.8 pCi/L
Adair County, MOborders it9227.2%1.8 pCi/L
Scotland County, MOborders it1816.7%1.4 pCi/L
The nearest Missouri counties to Schuyler County with 30 or more tests, 2008 to 2017, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Adair County20 mi9227.2%1.8 pCi/L
Macon County44 mi3619.4%1.7 pCi/L
Lewis County49 mi7132.4%2.6 pCi/L
Linn County52 mi3718.9%1.8 pCi/L
Marion County66 mi28241.8%3.2 pCi/L
Randolph County71 mi5817.2%1.8 pCi/L
Livingston County72 mi4922.4%2.1 pCi/L
Monroe County73 mi3023.3%1.5 pCi/L
Schuyler County ten-year laboratory totals, against Missouri's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestMissouri, pooledChange from the row before
2008 to 2017119.1%1.0 pCi/L5.8 pCi/L30.6%Level
2007 to 2016119.1%1.0 pCi/L5.8 pCi/L30.8%Level
2006 to 2015119.1%1.0 pCi/L5.8 pCi/L31.7%+1.4 points
2005 to 2014137.7%1.0 pCi/L5.8 pCi/L32.4%First on file

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

Schuyler County, Geology

The ground under Schuyler County

Predicted

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

USGS's geologic areas under Schuyler County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Dissected Till PlainsTill-covered Pennsylvanian sandstone, shale, and limestone.Moderate11100%

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

Schuyler County beside the ground around it

Across Missouri 8.2% of the land is rated high; none of Schuyler County's is. Of the 5 counties that border it, 2 have more high-potential ground, Davis County, IA the most at 57.1%.

Share of land by USGS radon potential: Schuyler County, the 5 counties bordering it and Missouri
AreaEPA zoneLow potentialModerate potentialHigh potential
Schuyler CountyZone 2None100%None
Scotland CountyZone 2None100%None
Davis County, IAZone 1None42.9%57.1%
Adair CountyZone 2None100%None
Appanoose County, IAZone 1None46.5%53.5%
Putnam CountyZone 2None100%None
Missouri115 counties, pooled by land areaVaries5.8%86.0%8.2%

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

What it means

Schuyler County, Questions

Questions about radon in Schuyler County

Are radon levels high in Schuyler County?

Over the 2008 to 2017 laboratory totals, 9.1% of the radon tests reported to CDC for Schuyler County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.0 pCi/L. Of the counties bordering it, 3 have a figure over the 2008 to 2017 laboratory totals: Appanoose County, IA reported the largest share at or above 4 pCi/L, 45.3%, and Adair County the smallest, 27.2%, with Davis County, IA at 42.4% between.

Which counties border Schuyler County?

Schuyler County borders 5 counties: Scotland County, MO, Davis County, IA, Adair County, MO, Appanoose County, IA and Putnam County, MO.

Products

Schuyler County, Products

Testing a home in Schuyler County

No CDC figure names Schuyler County; the nearest county with one, Adair County (20 miles away), reported 27.2% 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 Schuyler County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Schuyler County homes, compared

Explore

Schuyler County, Bordering counties

Counties bordering Schuyler County

Calculated by Radon411

Schuyler County, Cities and towns

Cities and towns in Schuyler County

The Census Bureau estimates 4,140 residents in Schuyler County for July 1, 2025, 134 more than in 2020 (+3.3%). That works out to 13 people per square mile of land. No town dominates: Lancaster, the largest, has 691 residents, 16.7% of the total. Reported testing is thin here: 13 tests over 2005 to 2014, or 3.1 for every 1,000 residents (2025 estimate), where Missouri as a whole comes to 6.8.

From Lancaster to Glenwood, CDC publishes no figure by town: each reads Schuyler County's.

The cities and towns in Schuyler County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Lancaster691+3.1%16.7%
Queen City572+3.4%13.8%
Greentopextends beyond Schuyler County391+3.2%Counted whole
Downing308+3.4%7.4%
Glenwood185+3.4%4.5%

5 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 Schuyler County is counted whole, so it has no share.

Schuyler County, Homes

Homes in Schuyler County

Schuyler County is a place of houses on their own lots: 79% of its 1,906 homes are detached single-family houses, against 70% across Missouri. The homes are older than Missouri's as a whole: half were built before 1963 (1978 for Missouri), and 45% date from before 1960. Owners live in 79% of the occupied homes (Missouri: 68%), so for most households a test and a fix are their own to order.

Homes in Schuyler County, Missouri, 2019 to 2023
HomesSchuyler CountyMissouri
Housing units1,9062,809,501
Detached houses79%70%
In buildings of 5 or more2%13%
Mobile homes10%5%
Built before 196045%28%
Built since 200015%21%
Middle year built19631978
Owner-occupied79%68%

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