Short-term kit
Air Chek Short-Term radon test kit you hang, lab fee included
- Lab fee included
In home: 72 to 168 hours
Locations and reports
Radon Levels in Christian County, Illinois
EPA puts Christian County in Zone 2, its middle radon zone, and high results are common there: 42.3% of the 213 radon tests reported to CDC (2017) 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
Share at 4+ pCi/L
42.3%
8.6 pts above IL
- Christian
- 42.3%
- Illinois
- 33.7%
213 tests, 2017
Median result
3.5pCi/L
Below action level
- Christian
- 3.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2017
Tests reported
213
40th of 70 by tests
- Christian
- 213
- Cook
- 26,937
Reported to CDC before any fix, 2017
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Rank in Illinois
39 of 70
Middle half
- Christian
- 42.3%
- Stark
- 69.2%
By share, of 70 with 30+ tests
Read a result for Christian County
Starts at Christian County's median, 3.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.5 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Christian County's median reported result, 2017.
The data
Christian County, At a glance
Christian County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Christian County is a
USGS geologic potential: High across 83% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Christian County, 2017
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 44.1% |
| 2015 | 52.8% |
| 2017 | 42.3% |
2017: 42.3%. Across these years the share ran from 42.3% to 52.8%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 213 tests reported to CDC for Christian County over 2017, 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: 2017. Measured data period: 2005 to 2017 (every CDC figure on file).
Christian County, Compared
Christian County radon figures, compared
Calculated by Radon411In Christian County, about 4 in 10 reported tests in 2017 (90 of 213) were at or above EPA's action level. Against the national pool of 31.7%, the gap is 10.6 points higher. Across 93 Illinois counties pooled together, 33.7% of tests reached that level, so Christian County runs 8.6 points above its state.
Of 3 neighbours with a figure, 2 reported a larger share at or above 4 pCi/L and 1 a smaller one; the spread is 38.8% (Macon County) to 43.9% (Montgomery County). By share, Christian County is 39th of 70 Illinois counties with 30 or more tests for the same period.
Year by year, 2014 opened at 44.1% and 2017 closed at 42.3% (about level), with 2015 the high at 52.8%. Half the tests came in under 3.5 pCi/L and half over it; the single highest reached 22.6 pCi/L. Below the action level, 51 tests (23.9%) came in under 2 pCi/L, against 37.7% statewide, and 72 tests (33.8%) fell between 2 and 4, against 28.6% statewide.
Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 42.3% share point the same way here. USGS geology rates 83% of the county's land high radon potential.
The busiest year on file was 2017, with 213 tests reported; the quietest, 2015, had 108.
Christian CountyIllinois, pooled
42.3% % of tests33.7% % of tests
| Year | Tests | Christian County, at or above 4 pCi/L | Illinois, pooled |
|---|---|---|---|
| 2014 | 204 | 44.1% | 37.8% |
| 2015 | 108 | 52.8% | 36.6% |
| 2017 | 213 | 42.3% | 33.7% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Christian County, Geology
The ground under Christian County
PredictedMost of the ground under Christian County is one class on USGS's geologic map: 83.1% of its land is high radon potential, with 16.9% moderate. The map puts 83.1% of Christian County in the area it calls Galesburg Plain and 16.9% in Southern Central Lowland Province. USGS gives the first a radon index of 13, in the high band (12 to 17), and the second 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Galesburg Plain | Illinoian glacial deposits and loess over Paleozoic sedimentary rocks. | High | 13 | 83.1% |
| Southern Central Lowland Province | Illinoian glacial deposits, sandstone, and gray shale. | Moderate | 9 | 16.9% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Christian County beside the ground around it
Christian County has more high-potential ground than Illinois as a whole: 83.1% of its land against 64.5%. Of the 4 counties that border it, 2 have more high-potential ground, Macon County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Christian County, Local resources
Radon testing and mitigation in Christian County
- IEMA-OHS Radon ProgramIEMA-OHS Radon Program, run by Illinois Emergency Management Agency and Office of Homeland Security, licenses or certifies radon professionals and states the rule for disclosing radon when a home is sold, and answers questions about testing and mitigation in Illinois.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- Professionals in Illinois339 professionals are listed in Illinois.
What Illinois's program says
- Phone
- (800) 325-1245
- Licensing of radon professionals
The Agency also licenses and regulates the individuals who provide radon measurement and mitigation to the public.
- Disclosure when a home is sold or rented
Illinois Radon Awareness Act - This is the legislation that requires the seller to provide to the buyer of any interest in residential real property the IEMA-OHS pamphlet entitled "Radon Testing Guidelines for Real Estate Transactions" and the Illinois Disclosure of Information on Radon Hazards.
What it means
Christian County, Questions
Questions about radon in Christian County
Are radon levels high in Christian County?
In 2017, 42.3% of the radon tests reported to CDC for Christian County, Illinois were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.5 pCi/L. Of 70 Illinois counties with 30 or more tests for the same period, 38 reported a higher share; pooled, the state comes to 33.7%.
Which counties border Christian County?
Christian County borders 4 counties: Montgomery County, Macon County, Sangamon County and Shelby County.
Products
Christian County, Products
Testing a home in Christian County
In Christian County, 42.3% of 213 tests reported to CDC in 2017 reached 4 pCi/L, against 33.7% pooled across Illinois. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Christian County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
MonitorAranet
Radon One battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Christian County, Bordering counties
Counties bordering Christian County
Calculated by Radon411- Radon levels in Shelby CountyEPA zone 2
71.4%at or above 4 pCi/L
Median 5.2 pCi/L · 21 tests · 29.1 points above Christian County
- Radon levels in Montgomery CountyEPA zone 2
43.9%at or above 4 pCi/L
Median 3.3 pCi/L · 123 tests · 1.6 points above Christian County
- Radon levels in Sangamon CountyEPA zone 1
43.7%at or above 4 pCi/L
Median 3.7 pCi/L · 3,378 tests · 1.4 points above Christian County
- Radon levels in Macon CountyEPA zone 1
38.8%at or above 4 pCi/L
Median 3.1 pCi/L · 1,251 tests · 3.5 points below Christian County
Christian County, Cities and towns
Cities and towns in Christian County
About 33,443 people live in Christian County by the Census Bureau's estimate for July 1, 2025, 517 fewer than in 2020 (−1.5%). That works out to 47 people per square mile of land. Its largest town, Taylorville, has 10,522 residents, 31.5% of the total. Reported testing is thin here: 213 tests over 2017, or 6.4 for every 1,000 residents (2025 estimate), where Illinois as a whole comes to 10.9.
From Taylorville to Jeisyville, CDC publishes no figure by town: each reads Christian County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Taylorville | 10,522 | +0.3% | 31.5% |
| Panaextends beyond Christian County | 5,010 | −3.2% | Counted whole |
| Moweaquaextends beyond Christian County | 1,735 | −1.2% | Counted whole |
| Kincaid | 1,310 | −2.7% | 3.9% |
| Assumption | 1,112 | −3.1% | 3.3% |
| Edinburg | 1,055 | −2.8% | 3.2% |
| Morrisonville | 977 | −1.9% | 2.9% |
| Stonington | 794 | −3.5% | 2.4% |
| Tovey | 445 | −3.7% | 1.3% |
| Mount Auburn | 441 | −3.3% | 1.3% |
| Owaneco | 206 | −2.8% | 0.6% |
| Bulpitt | 204 | −3.8% | 0.6% |
- Palmer
- Harvel (part)
- Jeisyville
15 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. “(part)” marks a place that extends into another county. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond Christian County is counted whole, so it has no share.
Christian County, Homes
Homes in Christian County
Christian County is a place of houses on their own lots: 83% of its 15,190 homes are detached single-family houses, against 58% across Illinois. Half of its homes were built before 1963, close to Illinois' 1970: 47% date from before 1960 and 8% from 2000 or later. 74% of occupied homes are lived in by their owner (Illinois: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Christian County | Illinois |
|---|---|---|
| Housing units | 15,190 | 5,443,501 |
| Detached houses | 83% | 58% |
| In buildings of 5 or more | 7% | 22% |
| Mobile homes | 4% | 2% |
| Built before 1960 | 47% | 38% |
| Built since 2000 | 8% | 16% |
| Middle year built | 1963 | 1970 |
| Owner-occupied | 74% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.