Locations and reports
Radon in Glenview, Illinois
EPA puts Cook County, where Glenview is, in Zone 2, its middle radon zone, and 19.4% of its 26,937 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
19.4%
14.3 pts below IL
- Cook
- 19.4%
- Illinois
- 33.7%
Cook, 67th of 70 in IL, 2017
Median result
1.9pCi/L
Below action level
- Cook
- 1.9 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of Cook's tests, 2017
Nearest county
27.4%
Lake, 19 miles
- Lake
- 27.4%
- Cook
- 19.4%
13,050 tests, 2017
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
Cook, where Glenview is
Tests reported
26,937
In Cook
- Cook
- 26,937
- Lake
- 13,050
Reported to CDC before any fix, 2017
Read a result for Glenview
Starts at Cook County's median, 1.9 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.9 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. Cook County's median reported result, 2017.
The data
Glenview, What is published
What is published for Glenview
Every figure for Glenview is a county's
Radon data is published by county, not by city, so for Glenview it is Cook County's: its EPA zone (Zone 2) and the 26,937 tests reported to CDC for 2017. Only a test tells you about one home.
Glenview covers 14 square miles of land, all of it in Cook County. About 47,711 people live there, 3,408 to the square mile.
Glenview, Counties
The county Glenview lies in
MeasuredCook County's EPA zone and the figures CDC publishes for it, 2017.
Cook CountyZone 2Moderate predicted potential
- 19.4%
- Reported tests at or above 4 pCi/L
- 1.9 pCi/L
- Median reported result
- 26,937 tests
- Tests reported to CDC
- 4
- Annual years on file
Cook County ranks 67th of 70 Illinois counties with 30 or more tests for that period, 14.3 points below the 33.7% pooled across Illinois's counties, 12.3 points below the national pool of 31.7%.
The counties nearest Glenview with a CDC figure for 2017, measured from the middle of the city: Lake County (19 miles, 27.4% of 13,050 tests), DuPage County (21 miles, 33.7% of 19,401 tests) and Kane County (33 miles, 36.6% of 8,682 tests). Across the 8 nearest, the share at or above 4 pCi/L runs from 27.4% to 46.9%; the farthest of them, Boone County, is 54 miles away at 46.9%.
No business in the directory gives Glenview as its address; the Illinois list covers it. Illinois's other cities with a page of their own: Chicago, Rockford, Naperville and Springfield.
The counties around Glenview
By distance from the middle of Glenview; counties with 30 or more tests.
Predicted: EPA Map of Radon Zones, by county. Measured: CDC tracking data, by county, 2017.
Glenview, Geology
The ground under Glenview
PredictedUSGS's geologic map puts all of Glenview's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Wheaton Morainal Country, to which USGS gives a radon index of 11, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Wheaton Morainal Country | Glacial lake deposits and clay-rich glacial till. | Moderate | 11 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Glenview beside its county and Illinois
Cook County as a whole has 3.2% of its land rated high; none of that ground lies under Glenview. Across Illinois 64.5% of the land is rated high; none of Glenview's is.
The map rates the ground, not the air in any home.
Glenview, Homes
Homes in Glenview
Of Glenview's 19,405 homes, 60% are detached houses, against 40% across Cook County; 22% are in buildings of five or more homes. Much of Glenview is recent building: 28% of its homes have gone up since 2000 and the middle year built is 1977, against 1961 for Cook County. Owners live in 78% of the occupied homes (Cook County: 58%), so for most households a test and a fix are their own to order.
| Homes | Glenview | Cook County | Illinois |
|---|---|---|---|
| Housing units | 19,405 | 2,270,349 | 5,443,501 |
| Detached houses | 60% | 40% | 58% |
| In buildings of 5 or more | 22% | 34% | 22% |
| Mobile homes | 2% | 1% | 2% |
| Built before 1960 | 25% | 49% | 38% |
| Built since 2000 | 28% | 12% | 16% |
| Middle year built | 1977 | 1961 | 1970 |
| Owner-occupied | 78% | 58% | 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
Glenview, Local resources
Local resources for Glenview
Who to ask in Illinois: its radon program, test kits and professionals.
- IEMA-OHS Radon ProgramRun by Illinois Emergency Management Agency and Office of Homeland Security, phone (800) 325-1245.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 IllinoisRadon testers and mitigators in Illinois, each with how its listing was checked.
The program's own words on licensing and disclosure are on the Illinois page.
What it means
Glenview, Questions
Questions about radon in Glenview
What radon zone is Glenview in?
Glenview has no zone of its own: it shares Cook County's, Zone 2, the map's middle class: a predicted county average of 2 to 4 pCi/L.
What are radon levels in Glenview?
Cook County's 26,937 tests for 2017 put 19.4% at or above 4 pCi/L: most tests near Glenview come back under EPA's action level, but not all. The median reported result was 1.9 pCi/L.
Should I test my home in Glenview?
Yes. Roughly one reported test in 5 in Cook County reached 4 pCi/L. That is below Illinois' pooled 33.7%, and still not a reason to skip it, and ranks Cook County 67th of the 70 Illinois counties with 30 or more tests. Only a test puts a number on one house. How to test a home.
What ground is Glenview built on, as far as radon goes?
USGS's geologic map puts all of Glenview on one named area, "Wheaton Morainal Country", rated moderate for radon potential, radon index 11.
Is radon higher in the counties around Glenview?
Yes, in every direction measured. Each of the 8 nearest counties with a figure reports a larger share of high tests than Cook County's 19.4%; the highest is Boone County (46.9%, 54 miles off).
The answers use the published figures of Cook County, the county Glenview lies in.
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