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Radon in New Lenox, Illinois

EPA puts Will County, where New Lenox is, in Zone 2, its middle radon zone, and high results are common there: 40.0% of the 10,776 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

    40.0%

    6.3 pts above IL

    Will
    40.0%
    Illinois
    33.7%

    Will, 42nd of 70 in IL, 2017

  • Median result

    3.1pCi/L

    Below action level

    Will
    3.1 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of Will's tests, 2017

  • Nearest county

    19.4%

    Cook, 24 miles

    Cook
    19.4%
    Will
    40.0%

    26,937 tests, 2017

  • EPA radon zone

    Zone 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    Will, where New Lenox is

  • Tests reported

    10,776

    In Will

    Will
    10,776
    Cook
    26,937

    Reported to CDC before any fix, 2017

Read a result for New Lenox

Starts at Will County's median, 3.1 pCi/L

3.1pCi/L

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

EPA’s reading of 3.1 pCi/L

Between 2 and 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 between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Will County's median reported result, 2017.

The data

New Lenox, What is published

What is published for New Lenox

Information:

Every figure for New Lenox is a county's

Radon data is published by county, not by city, so for New Lenox it is Will County's: its EPA zone (Zone 2) and the 10,776 tests reported to CDC for 2017. Only a test tells you about one home.

New Lenox covers 15.7 square miles of land, all of it in Will County. About 28,893 people live there, 1,838 to the square mile.

New Lenox, Counties

The county New Lenox lies in

Measured

Will County's EPA zone and the figures CDC publishes for it, 2017.

Will CountyZone 2Moderate predicted potential

40.0%
Reported tests at or above 4 pCi/L
3.1 pCi/L
Median reported result
10,776 tests
Tests reported to CDC
4
Annual years on file

Will County ranks 42nd of 70 Illinois counties with 30 or more tests for that period, 6.3 points above the 33.7% pooled across Illinois's counties, 8.3 points above the national pool of 31.7%.

Measured from the middle of New Lenox, the nearest counties with a CDC figure for 2017 are Cook County (24 miles, 19.4% of 26,937 tests), DuPage County (24 miles, 33.7% of 19,401 tests) and Kendall County (24 miles, 35.0% of 3,045 tests). Across the 8 nearest, the share at or above 4 pCi/L runs from 19.4% to 45.8%; the farthest of them, DeKalb County, is 49 miles away at 41.1%.

The directory lists 2 businesses with an address in New Lenox, 1 for testing and 1 for mitigation. Illinois's other cities with a page of their own: Chicago, Rockford, Naperville and Springfield.

The counties around New Lenox

By distance from the middle of New Lenox; counties with 30 or more tests.

Nearest counties to New Lenox with 30 or more tests
CountyDistanceTestsAt or above 4 pCi/LMedian
Cook County24 mi26,93719.4%1.9 pCi/L
DuPage County24 mi19,40133.7%2.7 pCi/L
Kendall County24 mi3,04535.0%2.8 pCi/L
Kankakee County26 mi52231.6%2.7 pCi/L
Grundy County28 mi39032.3%2.4 pCi/L
Kane County38 mi8,68236.6%2.8 pCi/L
LaSalle County49 mi1,00245.8%3.6 pCi/L
DeKalb County49 mi1,70741.1%3.3 pCi/L

Predicted: EPA Map of Radon Zones, by county. Measured: CDC tracking data, by county, 2017.

New Lenox, Geology

The ground under New Lenox

Predicted

Most of the ground under New Lenox is one class on USGS's geologic map: 80.2% of its land is moderate radon potential, with 19.8% high. The map puts 80.2% of New Lenox in the area it calls Wheaton Morainal Country and 19.8% in Bloomington Ridged Plain. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 13, in the high band (12 to 17).

USGS's geologic areas under New Lenox
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Wheaton Morainal CountryGlacial lake deposits and clay-rich glacial till.Moderate1180.2%
Bloomington Ridged PlainWisconsinan glacial deposits and loess over Paleozoic sedimentary rocks.High1319.8%

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

New Lenox beside its county and Illinois

Will County as a whole has more high-potential ground than New Lenox: 59.8% of the county against 19.8% of the city. Illinois as a whole has more high-potential ground than New Lenox: 64.5% of its land, against 19.8% here.

Share of land by USGS radon potential: New Lenox, the county it lies in and Illinois
AreaEPA zoneLow potentialModerate potentialHigh potential
New LenoxBy countyNone80.2%19.8%
Will CountyZone 2None40.2%59.8%
Illinois102 counties, pooled by land areaVaries0.9%34.5%64.5%

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

New Lenox, Homes

Homes in New Lenox

New Lenox is a place of houses on their own lots: 81% of its 9,473 homes are detached single-family houses, against 75% across Will County. Half of its homes were built before 1997, close to Will County's 1992: 6% date from before 1960 and 41% from 2000 or later. Owners live in 91% of the occupied homes (Will County: 83%), so for most households a test and a fix are their own to order.

Homes in New Lenox, Will County, Illinois, 2019 to 2023
HomesNew LenoxWill CountyIllinois
Housing units9,473252,6845,443,501
Detached houses81%75%58%
In buildings of 5 or more5%8%22%
Mobile homesunder 1%1%2%
Built before 19606%16%38%
Built since 200041%32%16%
Middle year built199719921970
Owner-occupied91%83%67%

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

Local help

New Lenox, Professionals

Radon professionals listed in New Lenox

Businesses whose listed city is New Lenox, from the state registries and listings in the Radon411 directory, with the same business and certification status the directory shows.

2 listings with New Lenox as the city. See radon mitigation and testing in New Lenox, or all radon professionals in Illinois.

New Lenox, Local resources

Local resources for New Lenox

Who to ask in Illinois: its radon program, test kits and professionals.

What it means

New Lenox, Questions

Questions about radon in New Lenox

What radon zone is New Lenox in?

New Lenox takes its zone from Will County, which EPA puts in Zone 2, the map's middle class: a predicted county average of 2 to 4 pCi/L.

What are radon levels in New Lenox?

High results are ordinary around New Lenox: 40.0% of the 10,776 tests reported from Will County for 2017 were at or above 4 pCi/L, the level at which EPA says to fix a home. The median reported result was 3.1 pCi/L.

Should I test my home in New Lenox?

Yes. Will County reported about 4,310 of its 10,776 tests at or above 4 pCi/L. That is above Illinois' pooled 33.7%, and ranks Will County 42nd of the 70 Illinois counties with 30 or more tests. Which homes they were, no map can say. How to test a home.

What ground is New Lenox built on, as far as radon goes?

80.2% of New Lenox sits on what USGS's map calls "Wheaton Morainal Country", rated moderate for radon potential, radon index 11; another 19.8% is "Bloomington Ridged Plain", rated high for radon potential, radon index 13. So the ground changes within New Lenox itself.

Is radon higher in the counties around New Lenox?

It depends which way you go. 2 of the 8 nearest counties with a figure report a larger share than Will County's 40.0% and 6 a smaller one: from Cook County (19.4%, 24 miles off) to LaSalle County (45.8%, 49 miles off).

Who tests for or fixes radon in New Lenox?

New Lenox is the address of 2 businesses in Radon411's directory, 1 listed for testing and 1 for mitigation. Each entry names the public list it came from. Radon professionals in New Lenox.

The answers use the published figures of Will County, the county New Lenox lies in.