Short-term kit
RA400 short-term liquid scintillation radon test kit, lab fee included
- Lab fee included
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Gallatin County, Illinois
EPA puts Gallatin County in Zone 2, its middle radon zone, and only 6 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
35.3%
Posey County
- Posey
- 35.3%
- Saline
- 20.7%
4 of 6 neighbours have 30+ tests, 2008 to 2017
Nearest county
20.7%
Saline County, 17 miles
- Saline
- 20.7%
- Illinois
- 43.1%
Share at 4+ pCi/L, 82 tests, 2008 to 2017
Ground above low
100.0%
0.9 pts above Illinois
- Gallatin
- 100.0%
- Illinois
- 99.1%
Share of land USGS rates moderate or high potential
Tests reported
7
Too few for a share
- Gallatin
- 7
- Needed
- 30
2007 to 2016, laboratory
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Read a result for Gallatin County
Starts at EPA's action level
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
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 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
Gallatin County, At a glance
Gallatin County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Gallatin 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
Radon tests reported for Gallatin County, 2008 to 2017, laboratory
CDC holds 6 reported tests for Gallatin County over the 2008 to 2017 laboratory totals, with a median of 2.0 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Gallatin County beside the counties around it is how this page reads it.
What these figures count
Only 6 tests were reported to CDC for Gallatin 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).
Gallatin County, Compared
Gallatin County radon figures, compared
Calculated by Radon411CDC's largest figure for Gallatin County rests on 7 tests over the 2007 to 2016 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 14.3 points and no rank or comparison is drawn from it. Results reached as high as 2.5 pCi/L, with a middle value of 1.9 pCi/L.
Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Posey County, IN reported the largest share at or above 4 pCi/L, 35.3%, and Saline County the smallest, 20.7%, with White County at 29.4% and Hamilton County at 23.3% between. Farther out, Williamson County (38 miles away) at 13.3%, Franklin County (41 miles away) at 19.6% and Johnson County (41 miles away) at 14.6% have figures too. Pooled across 102 Illinois counties, 43.1% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Stark County reported the highest share (80.5%) and Williamson County the lowest (13.3%). EPA's 1993 map puts Gallatin 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.
Gallatin County, Geology
The ground under Gallatin County
PredictedUSGS's geologic map puts all of Gallatin County's mapped land in one class: moderate radon potential. The map puts 84.6% of Gallatin County in the area it calls Shawnee Hills Section and 15.0% in Southern Central Lowland Province. USGS gives the first a radon index of 10 and the second 9, both in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Shawnee Hills Section | Unglaciated Ordovician to Pennsylvanian limestone, sandstone, and shale. | Moderate | 10 | 84.6% |
| Southern Central Lowland Province | Illinoian glacial deposits, sandstone, and gray shale. | Moderate | 9 | 15.0% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Gallatin County beside the ground around it
Across Illinois 64.5% of the land is rated high; none of Gallatin County's is. Of the 6 counties that border it, none has as large a share of moderate-potential ground; Hamilton County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Gallatin County, Local resources
Radon testing and mitigation in Gallatin 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
Gallatin County, Questions
Questions about radon in Gallatin County
Are radon levels high in Gallatin County?
Over the 2008 to 2017 laboratory totals, 33.3% of the radon tests reported to CDC for Gallatin County, Illinois were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.0 pCi/L. Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Posey County, IN reported the largest share at or above 4 pCi/L, 35.3%, and Saline County the smallest, 20.7%, with White County at 29.4% and Hamilton County at 23.3% between.
Which counties border Gallatin County?
Gallatin County borders 6 counties: Union County, KY, Hardin County, IL, Saline County, IL, White County, IL, Hamilton County, IL and Posey County, IN.
Products
Gallatin County, Products
Testing a home in Gallatin County
No CDC figure names Gallatin County; the nearest county with one, Saline County (17 miles away), reported 20.7% 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 Gallatin County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
Monitor
Wave Radon battery smart radon monitor
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- App only
Method: Alpha spectrometry
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Gallatin County, Bordering counties
Counties bordering Gallatin County
Calculated by Radon411- Radon levels in Posey County, INEPA zone 2
35.3%at or above 4 pCi/L
Median 2.8 pCi/L · 215 tests
- Radon levels in White County, ILEPA zone 2
29.4%at or above 4 pCi/L
Median 2.9 pCi/L · 34 tests
- Radon levels in Union County, KYEPA zone 2
25.0%at or above 4 pCi/L
Median 1.6 pCi/L · 8 tests
- Radon levels in Hamilton County, ILEPA zone 2
23.3%at or above 4 pCi/L
Median 1.9 pCi/L · 30 tests
- Radon levels in Hardin County, ILEPA zone 2
22.2%at or above 4 pCi/L
Median 1.4 pCi/L · 9 tests
- Radon levels in Saline County, ILEPA zone 2
20.7%at or above 4 pCi/L
Median 1.7 pCi/L · 82 tests
Gallatin County, Cities and towns
Cities and towns in Gallatin County
Gallatin County has been losing residents: from 4,933 in 2020 to 4,616 on July 1, 2025, a fall of 6.4% by the Census Bureau's estimates. That works out to 14 people per square mile of land. Its largest town, Shawneetown, has 985 residents, 21.3% of the total. Reported testing is thin here: 7 tests over 2007 to 2016, or 1.5 for every 1,000 residents (2025 estimate), where Illinois as a whole comes to 8.3.
From Shawneetown to Junction, CDC publishes no figure by town: each reads Gallatin County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Shawneetown | 985 | −6.2% | 21.3% |
| Ridgway | 795 | −6.3% | 17.2% |
| Equality | 499 | −6.7% | 10.8% |
| New Havenextends beyond Gallatin County | 376 | −5.5% | Counted whole |
| Omaha | 203 | −6.0% | 4.4% |
| Old Shawneetown | 101 | −5.6% | 2.2% |
| Junction | 52 | −7.1% | 1.1% |
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 Gallatin County is counted whole, so it has no share.
Gallatin County, Homes
Homes in Gallatin County
Of Gallatin County's 2,506 homes, 71% are detached houses, against 58% across Illinois; 21% are mobile homes. Half of its homes were built before 1971, close to Illinois' 1970: 33% date from before 1960 and 12% from 2000 or later. Owners live in 80% of the occupied homes (Illinois: 67%), so for most households a test and a fix are their own to order.
| Homes | Gallatin County | Illinois |
|---|---|---|
| Housing units | 2,506 | 5,443,501 |
| Detached houses | 71% | 58% |
| In buildings of 5 or more | 1% | 22% |
| Mobile homes | 21% | 2% |
| Built before 1960 | 33% | 38% |
| Built since 2000 | 12% | 16% |
| Middle year built | 1971 | 1970 |
| Owner-occupied | 80% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.