
Short-term kit![]()
RA100 short-term liquid scintillation radon test kit
- Lab fee extra
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
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
3 of 5 neighbours have 30+ tests, 2008 to 2017
Nearest county
27.2%
Adair County, 20 miles
Share at 4+ pCi/L, 92 tests, 2008 to 2017
Ground above low
100.0%
5.8 pts above Missouri
Share of land USGS rates moderate or high potential
Tests reported
13
Too few for a share
2005 to 2014, laboratory
EPA radon zone
Zone 2
Moderate potential
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Read a result for Schuyler County
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
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
Predicted: EPA radon zone
Schuyler County is a
USGS geologic potential: Moderate across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
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.
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).
Schuyler County, Compared
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.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Schuyler County, Geology
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).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Dissected Till Plains | Till-covered Pennsylvanian sandstone, shale, and limestone. | Moderate | 11 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
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%.
The map rates the ground, not the air in any home.
Local help
Schuyler County, Local resources
Free radon test kits are available for Missouri residents (limit one per household).
What it means
Schuyler County, Questions
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.
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
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 monitors: 1 of 3
Explore
Schuyler County, Bordering counties
45.3%at or above 4 pCi/L
Median 3.7 pCi/L · 117 tests
42.4%at or above 4 pCi/L
Median 3.1 pCi/L · 85 tests
33.3%at or above 4 pCi/L
Median 1.8 pCi/L · 9 tests
27.2%at or above 4 pCi/L
Median 1.8 pCi/L · 92 tests
16.7%at or above 4 pCi/L
Median 1.4 pCi/L · 18 tests
Schuyler County, Cities and towns
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.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Lancaster | 691 | +3.1% | 16.7% |
| Queen City | 572 | +3.4% | 13.8% |
| Greentopextends beyond Schuyler County | 391 | +3.2% | Counted whole |
| Downing | 308 | +3.4% | 7.4% |
| Glenwood | 185 | +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
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 | Schuyler County | Missouri |
|---|---|---|
| Housing units | 1,906 | 2,809,501 |
| Detached houses | 79% | 70% |
| In buildings of 5 or more | 2% | 13% |
| Mobile homes | 10% | 5% |
| Built before 1960 | 45% | 28% |
| Built since 2000 | 15% | 21% |
| Middle year built | 1963 | 1978 |
| Owner-occupied | 79% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.