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 Lawrence County, Illinois
EPA puts Lawrence County in Zone 2, its middle radon zone, and only 3 radon tests from it are on file with CDC (2015). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
18.8%
24.3 pts below IL
- Lawrence
- 18.8%
- Illinois
- 43.1%
48 tests, 2008 to 2017
Median result
1.8pCi/L
Below action level
- Lawrence
- 1.8 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
48
85th of 93 by tests
- Lawrence
- 48
- Cook
- 14,199
Reported to CDC before any fix, 2008 to 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
88 of 93
Lowest quarter
- Lawrence
- 18.8%
- Stark
- 80.5%
By share, of 93 with 30+ tests
Read a result for Lawrence County
Starts at Lawrence County's median, 1.8 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.8 pCi/L
Below 2 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Lawrence County's median reported result, 2008 to 2017.
The data
Lawrence County, At a glance
Lawrence County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Lawrence 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 Lawrence County, 2015
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 66.7% |
| 2015 | 100.0% |
2015: 100.0%. Across these years the share ran from 66.7% to 100.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 3 tests were reported to CDC for Lawrence County over 2015, 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: 2015. Measured data period: 2005 to 2017 (every CDC figure on file).
Lawrence County, Compared
Lawrence County radon figures, compared
Calculated by Radon411Lawrence County's 48 reported tests over the 2008 to 2017 laboratory totals had a middle value of 1.8 pCi/L and a maximum of 22.2 pCi/L, and 18.8% reached 4 pCi/L. Illinois as a whole (102 Illinois counties, pooled) comes to 43.1%: 24.3 points higher than here.
The newest figure, in 2015, counts only 3 tests (100.0% at or above 4 pCi/L), too few to compare, so this reading uses the 48-test figure.
Among its state's counties it ranks 88th of 93 Illinois counties with 30 or more tests for the same period. Statewide for the same period, Stark County reported the highest share (80.5%) and Williamson County the lowest (13.3%).
Below the action level, 26 tests (54.2%) came in under 2 pCi/L, against 31.6% statewide, and 13 tests (27.1%) fell between 2 and 4, against 25.3% statewide. The busiest year on file was 2014, with 18 tests reported; the quietest, 2015, had 3.
EPA's 1993 zone map puts Lawrence County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.
Next door, the shares run from 18.9% in Richland County to 43.1% in Knox County, IN.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Lawrence County, Geology
The ground under Lawrence County
PredictedUSGS's geologic map puts all of Lawrence County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Southern Central Lowland Province, to which USGS gives a radon index of 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Southern Central Lowland Province | Illinoian glacial deposits, sandstone, and gray shale. | Moderate | 9 | 99.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lawrence County beside the ground around it
Across Illinois 64.5% of the land is rated high; none of Lawrence County's is. Of the 4 counties that border it, none has as large a share of moderate-potential ground; Knox County, IN comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Lawrence County, Local resources
Radon testing and mitigation in Lawrence 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
Lawrence County, Questions
Questions about radon in Lawrence County
Are radon levels high in Lawrence County?
In 2015, 100.0% of the radon tests reported to CDC for Lawrence County, Illinois were at or above 4 pCi/L, and the median reported pre-mitigation result was 6.5 pCi/L. Of 93 Illinois counties with 30 or more tests for the same period, 87 reported a higher share; pooled, the state comes to 43.1%.
Which counties border Lawrence County?
Lawrence County borders 4 counties: Knox County, IN, Richland County, IL, Crawford County, IL and Wabash County, IL.
Products
Lawrence County, Products
Testing a home in Lawrence County
In Lawrence County, 18.8% of 48 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 43.1% pooled across Illinois. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Lawrence 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
Lawrence County, Bordering counties
Counties bordering Lawrence County
Calculated by Radon411- Radon levels in Knox County, INEPA zone 2
43.1%at or above 4 pCi/L
Median 3.4 pCi/L · 58 tests · 24.3 points above Lawrence County
- Radon levels in Wabash County, ILEPA zone 2
32.4%at or above 4 pCi/L
Median 3.0 pCi/L · 34 tests · 13.6 points above Lawrence County
- Radon levels in Crawford County, ILEPA zone 2
19.3%at or above 4 pCi/L
Median 1.8 pCi/L · 181 tests · 0.5 points above Lawrence County
- Radon levels in Richland County, ILEPA zone 2
18.9%at or above 4 pCi/L
Median 1.8 pCi/L · 148 tests · 0.1 points above Lawrence County
Lawrence County, Cities and towns
Cities and towns in Lawrence County
Lawrence County has been losing residents: from 15,277 in 2020 to 13,790 on July 1, 2025, a fall of 9.7% by the Census Bureau's estimates. That works out to 37 people per square mile of land. Its largest town, Lawrenceville, has 4,356 residents, 31.6% of the total. Together its 5 incorporated places hold 60.0% of those residents; the other 40.0% live outside any of them. Reported testing is thin here: 48 tests over 2008 to 2017, or 3.5 for every 1,000 residents (2025 estimate), where Illinois as a whole comes to 8.6.
From Lawrenceville to Russellville, CDC publishes no figure by town: each reads Lawrence County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Lawrenceville | 4,356 | +4.0% | 31.6% |
| Sumner | 1,656 | −37.2% | 12.0% |
| Bridgeport | 1,652 | −8.0% | 12.0% |
| St. Francisville | 522 | −8.3% | 3.8% |
| Russellville | 91 | −9.0% | 0.7% |
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).
Lawrence County, Homes
Homes in Lawrence County
Of Lawrence County's 6,358 homes, 73% are detached houses, against 58% across Illinois; 18% are mobile homes. Half of its homes were built before 1963, close to Illinois' 1970: 46% date from before 1960 and 11% from 2000 or later. Owners live in 75% of the occupied homes (Illinois: 67%), so for most households a test and a fix are their own to order.
| Homes | Lawrence County | Illinois |
|---|---|---|
| Housing units | 6,358 | 5,443,501 |
| Detached houses | 73% | 58% |
| In buildings of 5 or more | 3% | 22% |
| Mobile homes | 18% | 2% |
| Built before 1960 | 46% | 38% |
| Built since 2000 | 11% | 16% |
| Middle year built | 1963 | 1970 |
| Owner-occupied | 75% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.