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Radon Levels in Livingston County, Illinois

EPA puts Livingston County in Zone 1, its highest radon zone, and high results are common there: 61.7% of the 345 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

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  • Share at 4+ pCi/L

    61.7%

    28.0 pts above IL

    Livingston
    61.7%
    Illinois
    33.7%

    345 tests, 2017

  • Median result

    5.3pCi/L

    Action level reached

    Livingston
    5.3 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2017

  • Tests reported

    345

    33rd of 70 by tests

    Livingston
    345
    Cook
    26,937

    Reported to CDC before any fix, 2017

  • EPA radon zone

    Zone 1

    Highest potential

    1. Zone 1
    2. 2
    3. 3

    1 highest, 3 lowest

    EPA predicts over 4 pCi/L indoors

  • Rank in Illinois

    6 of 70

    Top quarter

    Livingston
    61.7%
    Stark
    69.2%

    By share, of 70 with 30+ tests

Read a result for Livingston County

Starts at Livingston County's median, 5.3 pCi/L

5.3pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 5.3 pCi/L

At or above 4 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 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. Livingston County's median reported result, 2017.

Interpret this readingWhat a fix costs

The data

Livingston County, At a glance

Livingston County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

EPA puts all of Livingston County in and predicts an average indoor of greater than 4 pCi/L (greater than 150 Bq/m³) across the county. That is one forecast for the whole county, not a reading of any address in it; homes above EPA's turn up in all three zones.

USGS geologic potential: High across 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Livingston County, 2017

Share of reported tests at or above 4 pCi/L, by year, Livingston County
Share of reported tests at or above 4 pCi/L, by year, Livingston County
YearShare of reported tests at or above 4 pCi/L
201429.3%
201544.3%
20160.0%
201761.7%

2017: 61.7%. Across these years the share ran from 0.0% to 61.7%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

These are the 345 tests reported to CDC for Livingston 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).

How to read these figures

Livingston County, Compared

Livingston County radon figures, compared

Calculated by Radon411

More than half: 61.7% of the 345 radon tests reported to CDC for Livingston County in 2017 read at least 4 pCi/L. That places it 6th of 70 Illinois counties with 30 or more tests for the same period. That is 28.0 points above the 33.7% pooled from 93 Illinois counties.

The median result, 5.3 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 31.6 pCi/L. The rest split 10.4% under 2 pCi/L and 27.8% from 2 to 4 (Illinois: 37.7% and 28.6%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 61.7% share point the same way here.

No bordering county with a figure for the same period reported a higher share; the closest is Ford County at 57.1%, the lowest Kankakee County at 31.6%. Statewide for the same period, Stark County reported the highest share (69.2%) and Williamson County the lowest (8.4%).

The busiest year on file was 2017, with 345 tests reported; the quietest, 2016, had 3.

Over 3 years of annual figures the share rose 32.4 points, from 29.3% in 2014 to 61.7% in 2017; its peak was 61.7% in 2017. Nationally, every county with a figure for the same period pools to 31.7%; Livingston County sits 30.0 points above it.

Share of reported tests at or above 4 pCi/L by year, Livingston County against Illinois2014 to 2017, years with 30 or more tests: Livingston County 29.3% to 61.7%, the state's pooled share 33.7% in 2017.
Livingston CountyIllinois, pooled
Share of reported tests at or above 4 pCi/L by year, Livingston County against Illinois: data table
YearTestsLivingston County, at or above 4 pCi/LIllinois, pooled
201424629.3%37.8%
201518344.3%36.6%
201734561.7%33.7%
Livingston County against Illinois, the United States and nearby counties, 2017
AreaTestsAt or above 4 pCi/LMedianDifference from Livingston County
Livingston County34561.7%5.3 pCi/LThis county
Illinois, pooled93 counties, pooled138,00633.7%Not pooled−28.0 points
United States, pooled937 counties, pooled528,06231.7%Not pooled−30.0 points
Stark Countyhighest in the state3969.2%5.8 pCi/L+7.5 points
Williamson Countylowest in the state2498.4%0.9 pCi/L−53.3 points
Ford County, ILborders it4257.1%4.0 pCi/L−4.6 points
Woodford County, ILborders it76552.9%4.2 pCi/L−8.8 points
LaSalle County, ILborders it1,00245.8%3.6 pCi/L−15.9 points
McLean County, ILborders it4,54842.5%3.3 pCi/L−19.2 points
Grundy County, ILborders it39032.3%2.4 pCi/L−29.4 points
Kankakee County, ILborders it52231.6%2.7 pCi/L−30.1 points
Where Livingston County's reported results fell, 2017, beside Illinois and the United States
ResultLivingston County testsLivingston County shareIllinois shareU.S. shareAgainst Illinois
Under 2 pCi/L3610.4%37.7%43.5%−27.3 points
2 to 4 pCi/L9627.8%28.6%24.8%−0.8 points
4 pCi/L and above21361.7%33.7%31.7%+28.0 points
Livingston County ranked among the 70 Illinois counties with 30 or more tests, by share at or above 4 pCi/L, 2017
CountyRankTestsAt or above 4 pCi/LMedian
Stark County1 of 703969.2%5.8 pCi/L
Mercer County2 of 706668.2%5.5 pCi/L
Morgan County3 of 7038166.9%6.5 pCi/L
Fulton County4 of 7014464.6%5.8 pCi/L
Carroll County5 of 7021062.9%5.5 pCi/L
Livingston County6 of 7034561.7%5.3 pCi/L
Bureau County7 of 7033358.6%5.1 pCi/L
Stephenson County8 of 7051957.2%4.8 pCi/L
De Witt County9 of 7012657.1%5.2 pCi/L
Ford County9 of 704257.1%4.0 pCi/L
Knox County11 of 7024956.6%4.7 pCi/L
Livingston County radon tests by year, against Illinois' pooled share
YearTestsAt or above 4 pCi/LMedianHighestIllinois, pooledChange from the row before
201734561.7%5.3 pCi/L31.6 pCi/L33.7%+61.7 points
201630.0%2.3 pCi/L2.3 pCi/L17.4%−44.3 points
201518344.3%3.1 pCi/L28.1 pCi/L36.6%+15.0 points
201424629.3%2.4 pCi/L27.3 pCi/L37.8%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

Livingston County, Geology

The ground under Livingston County

Predicted

USGS's geologic map puts all of Livingston County's mapped land in one class: high radon potential. All of it lies in the area the map calls Bloomington Ridged Plain, to which USGS gives a radon index of 13, in the high band (12 to 17).

USGS's geologic areas under Livingston County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Bloomington Ridged PlainWisconsinan glacial deposits and loess over Paleozoic sedimentary rocks.High13100%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Livingston County beside the ground around it

Livingston County has more high-potential ground than Illinois as a whole: 100% of its land against 64.5%. Of the 6 counties that border it, none has as large a share of high-potential ground; Grundy County comes nearest at 100%.

Share of land by USGS radon potential: Livingston County, the 6 counties bordering it and Illinois
AreaEPA zoneLow potentialModerate potentialHigh potential
Livingston CountyZone 1NoneNone100%
Ford CountyZone 1None0.8%99.2%
McLean CountyZone 1NoneNone100%
LaSalle CountyZone 1NoneNone100%
Grundy CountyZone 1NoneNone100%
Woodford CountyZone 1NoneNone100%
Kankakee CountyZone 2None37.1%62.9%
Illinois102 counties, pooled by land areaVaries0.9%34.5%64.5%

The map rates the ground, not the air in any home.

Local help

Livingston County, Local resources

Radon testing and mitigation in Livingston County

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

Livingston County, Questions

Questions about radon in Livingston County

Are radon levels high in Livingston County?

In 2017, 61.7% of the radon tests reported to CDC for Livingston County, Illinois were at or above 4 pCi/L, and the median reported pre-mitigation result was 5.3 pCi/L. Of 70 Illinois counties with 30 or more tests for the same period, 5 reported a higher share; pooled, the state comes to 33.7%.

Which counties border Livingston County?

Livingston County borders 6 counties: Ford County, McLean County, LaSalle County, Grundy County, Woodford County and Kankakee County.

Products

Livingston County, Products

Testing a home in Livingston County

In Livingston County, 61.7% of 345 tests reported to CDC in 2017 reached 4 pCi/L, against 33.7% pooled across Illinois. In Zone 1 the year-round level in Livingston County is the one to know: a long-term test (more than 90 days) or a monitor, with a short-term kit for a first answer.

Test kits and monitors3

See every kit and monitor

Livingston County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Livingston County

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Livingston County, Bordering counties

Counties bordering Livingston County

Calculated by Radon411

Livingston County, Cities and towns

Cities and towns in Livingston County

About 35,057 people live in Livingston County by the Census Bureau's estimate for July 1, 2025, 751 fewer than in 2020 (−2.1%). That works out to 34 people per square mile of land. Streator, the largest place on its list (12,190 residents in all), extends beyond Livingston County, so no share of the total is worked out for it. CDC's 345 reported tests for 2017 work out to 9.8 per 1,000 residents (2025 estimate), close to Illinois' 10.9.

From Streator to Emington, CDC publishes no figure by town: each reads Livingston County's.

The 12 largest cities and towns in Livingston County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Streatorextends beyond Livingston County12,190−2.2%Counted whole
Pontiac10,806−3.5%30.8%
Dwightextends beyond Livingston County4,005−0.5%Counted whole
Fairbury3,597−1.1%10.3%
Chatsworth1,156−2.8%3.3%
Flanagan1,022−1.4%2.9%
Forrest1,015−2.7%2.9%
Odell974−3.0%2.8%
Cullom502−2.7%1.4%
Cornell438−2.9%1.2%
Saunemin402−1.5%1.1%
Long Point197−2.0%0.6%
  • Reddick (part)
  • Campus
  • Strawn
  • Emington

16 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 Livingston County is counted whole, so it has no share.

Livingston County, Homes

Homes in Livingston County

Livingston County is a place of houses on their own lots: 78% of its 15,930 homes are detached single-family houses, against 58% across Illinois. The homes are older than Illinois' as a whole: half were built before 1961 (1970 for Illinois), and 49% date from before 1960. 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 in Livingston County, Illinois, 2019 to 2023
HomesLivingston CountyIllinois
Housing units15,9305,443,501
Detached houses78%58%
In buildings of 5 or more7%22%
Mobile homes6%2%
Built before 196049%38%
Built since 20009%16%
Middle year built19611970
Owner-occupied74%67%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.