Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
Locations and reports
Radon Levels in Kankakee County, Illinois
EPA puts Kankakee County in Zone 2, its middle radon zone, and 31.6% of its 522 reported radon tests (2017) were 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
31.6%
2.1 pts below IL
- Kankakee
- 31.6%
- Illinois
- 33.7%
522 tests, 2017
Median result
2.7pCi/L
Below action level
- Kankakee
- 2.7 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2017
Tests reported
522
27th of 70 by tests
- Kankakee
- 522
- 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
57 of 70
Lowest quarter
- Kankakee
- 31.6%
- Stark
- 69.2%
By share, of 70 with 30+ tests
Read a result for Kankakee County
Starts at Kankakee County's median, 2.7 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.7 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. Kankakee County's median reported result, 2017.
The data
Kankakee County, At a glance
Kankakee County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Kankakee County is a
USGS geologic potential: High across 63% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Kankakee County, 2017
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 39.6% |
| 2015 | 40.3% |
| 2017 | 31.6% |
2017: 31.6%. Across these years the share ran from 31.6% to 40.3%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 522 tests reported to CDC for Kankakee 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).
Kankakee County, Compared
Kankakee County radon figures, compared
Calculated by Radon411In Kankakee County, about 3 in 10 reported tests in 2017 (165 of 522) were at or above EPA's action level. Against the national pool of 31.7%, the gap is 0.1 points lower. Across 93 Illinois counties pooled together, 33.7% of tests reached that level, so Kankakee County runs 2.1 points below its state.
Of 5 neighbours with a figure, 4 reported a larger share at or above 4 pCi/L and 1 a smaller one; the spread is 25.0% (Iroquois County) to 61.7% (Livingston County). By share, Kankakee County is 57th of 70 Illinois counties with 30 or more tests for the same period.
Year by year, 2014 opened at 39.6% and 2017 closed at 31.6% (down 8.0 points), with 2015 the high at 40.3%. Half the tests came in under 2.7 pCi/L and half over it; the single highest reached 50.2 pCi/L. Below the action level, 165 tests (31.6%) came in under 2 pCi/L, against 37.7% statewide, and 192 tests (36.8%) 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 31.6% share point the same way here. USGS geology rates 63% of the county's land high radon potential.
The busiest year on file was 2014, with 576 tests reported; the quietest, 2015, had 372.
Kankakee CountyIllinois, pooled
| Year | Tests | Kankakee County, at or above 4 pCi/L | Illinois, pooled |
|---|---|---|---|
| 2014 | 576 | 39.6% | 37.8% |
| 2015 | 372 | 40.3% | 36.6% |
| 2017 | 522 | 31.6% | 33.7% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Kankakee County, Geology
The ground under Kankakee County
PredictedUSGS's geologic map splits Kankakee County: 62.9% of its land is high radon potential and 37.1% moderate. The map puts 62.9% of Kankakee County in the area it calls Bloomington Ridged Plain and 34.0% in Kankakee Plain, with one smaller area beside them. USGS gives the first a radon index of 13, in the high band (12 to 17), and the second 11, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Bloomington Ridged Plain | Wisconsinan glacial deposits and loess over Paleozoic sedimentary rocks. | High | 13 | 62.9% |
| Kankakee Plain | Eolian quartz sand deposits. | Moderate | 11 | 34.0% |
| Wheaton Morainal Country | Glacial lake deposits and clay-rich glacial till. | Moderate | 11 | 3.1% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Kankakee County beside the ground around it
On high-potential ground Kankakee County is close to Illinois as a whole: 62.9% of its land against 64.5%. Of the 7 counties that border it, 4 have more high-potential ground, Grundy County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Kankakee County, Local resources
Radon testing and mitigation in Kankakee County
Listed radon businesses with an address in Kankakee 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.
Listed radon professionals by town: Bourbonnais, Manteno
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
Kankakee County, Questions
Questions about radon in Kankakee County
Are radon levels high in Kankakee County?
In 2017, 31.6% of the radon tests reported to CDC for Kankakee County, Illinois were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.7 pCi/L. Of 70 Illinois counties with 30 or more tests for the same period, 56 reported a higher share; pooled, the state comes to 33.7%.
Which counties border Kankakee County?
Kankakee County borders 7 counties: Iroquois County, IL, Will County, IL, Ford County, IL, Newton County, IN, Grundy County, IL, Lake County, IN and Livingston County, IL.
Products
Kankakee County, Products
Testing a home in Kankakee County
In Kankakee County, 31.6% of 522 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 Kankakee 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
MonitorPYZYCKYH
RD17 plug-in radon detector with a rechargeable battery and color screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Kankakee County, Bordering counties
Counties bordering Kankakee County
Calculated by Radon411- Radon levels in Livingston County, ILEPA zone 1
61.7%at or above 4 pCi/L
Median 5.3 pCi/L · 345 tests · 30.1 points above Kankakee County
- Radon levels in Ford County, ILEPA zone 1
57.1%at or above 4 pCi/L
Median 4.0 pCi/L · 42 tests · 25.5 points above Kankakee County
- Radon levels in Will County, ILEPA zone 2
40.0%at or above 4 pCi/L
Median 3.1 pCi/L · 10,776 tests · 8.4 points above Kankakee County
- Radon levels in Grundy County, ILEPA zone 1
32.3%at or above 4 pCi/L
Median 2.4 pCi/L · 390 tests · 0.7 points above Kankakee County
- Radon levels in Iroquois County, ILEPA zone 1
25.0%at or above 4 pCi/L
Median 1.9 pCi/L · 36 tests · 6.6 points below Kankakee County
- Radon levels in Newton County, INEPA zone 2
No CDC figure for 2017; its page reads it against its own neighbours.
- Radon levels in Lake County, INEPA zone 2
No CDC figure for 2017; its page reads it against its own neighbours.
Kankakee County, Cities and towns
Cities and towns in Kankakee County
About 105,525 people live in Kankakee County by the Census Bureau's estimate for July 1, 2025, 1,877 fewer than in 2020 (−1.7%). That works out to 156 people per square mile of land. Its largest town, Kankakee, has 23,400 residents, 22.2% of the total. Reported testing is thin here: 522 tests over 2017, or 4.9 for every 1,000 residents (2025 estimate), where Illinois as a whole comes to 10.9.
From Kankakee to Union Hill, CDC publishes no figure by town: each reads Kankakee County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Kankakee | 23,400 | −2.5% | 22.2% |
| Bourbonnais | 17,658 | −2.4% | 16.7% |
| Bradley | 15,214 | −1.1% | 14.4% |
| Manteno | 9,201 | +0.2% | 8.7% |
| Momence | 3,158 | −2.8% | 3.0% |
| Limestone | 1,518 | −2.2% | 1.4% |
| Herscher | 1,486 | −2.3% | 1.4% |
| Grant Park | 1,271 | −1.1% | 1.2% |
| St. Anne | 1,122 | −3.2% | 1.1% |
| Chebanseextends beyond Kankakee County | 1,014 | −3.4% | Counted whole |
| Essex | 849 | +0.8% | 0.8% |
| Aroma Park | 647 | −0.6% | 0.6% |
- Hopkins Park
- Sun River Terrace
- Bonfield
- Buckingham
- Cabery (part)
- Sammons Point
- Reddick (part)
- Irwin
- Union Hill
21 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 Kankakee County is counted whole, so it has no share.
Kankakee County, Homes
Homes in Kankakee County
Of Kankakee County's 45,396 homes, 71% are detached houses, against 58% across Illinois; 10% are in buildings of five or more homes. Half of its homes were built before 1971, close to Illinois' 1970: 33% date from before 1960 and 16% from 2000 or later. 69% 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 | Kankakee County | Illinois |
|---|---|---|
| Housing units | 45,396 | 5,443,501 |
| Detached houses | 71% | 58% |
| In buildings of 5 or more | 10% | 22% |
| Mobile homes | 7% | 2% |
| Built before 1960 | 33% | 38% |
| Built since 2000 | 16% | 16% |
| Middle year built | 1971 | 1970 |
| Owner-occupied | 69% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.