Short-term kitKidde
442020 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 3 days
Locations and reports
Radon Levels in Racine County, Wisconsin
EPA puts Racine County in Zone 2, its middle radon zone, and 37.3% of its 445 reported radon tests (2023) 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
37.3%
1.6 pts above WI
- Racine
- 37.3%
- Wisconsin
- 35.7%
445 tests, 2023
Median result
2.7pCi/L
Below action level
- Racine
- 2.7 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
445
11th of 69 by tests
- Racine
- 445
- Dane
- 2,887
Reported to CDC before any fix, 2023
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 Wisconsin
38 of 69
Middle half
- Racine
- 37.3%
- Langlade
- 65.8%
By share, of 69 with 30+ tests
Read a result for Racine County
Starts at Racine 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. Racine County's median reported result, 2023.
The data
Racine County, At a glance
Racine County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Racine County is a
USGS geologic potential: Moderate across 74% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Racine County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 55.1% |
| 2015 | 58.8% |
| 2016 | 54.6% |
| 2017 | 57.6% |
| 2019 | 50.9% |
| 2020 | 36.9% |
| 2021 | 47.2% |
| 2022 | 40.7% |
| 2023 | 37.3% |
2023: 37.3%. Across these years the share ran from 36.9% to 58.8%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 445 tests reported to CDC for Racine County over 2023, 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: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).
Racine County, Compared
Racine County radon figures, compared
Calculated by Radon411In Racine County, about 4 in 10 reported tests in 2023 (166 of 445) were at or above EPA's action level. Against the national pool of 33.4%, the gap is 3.9 points higher. Across 72 Wisconsin counties pooled together, 35.7% of tests reached that level, so Racine County runs 1.6 points above its state.
Of 4 neighbours with a figure, 3 reported a larger share at or above 4 pCi/L and 1 a smaller one; the spread is 20.2% (Milwaukee County) to 43.2% (Waukesha County). By share, Racine County is 38th of 69 Wisconsin counties with 30 or more tests for the same period.
Year by year, 2014 opened at 55.1% and 2023 closed at 37.3% (down 17.8 points), with 2015 the high at 58.8%. Half the tests came in under 2.7 pCi/L and half over it; the single highest reached 44.0 pCi/L. Below the action level, 181 tests (40.7%) came in under 2 pCi/L, against 41.4% statewide, and 98 tests (22.0%) fell between 2 and 4, against 23.0% statewide.
Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 37.3% share point the same way here. USGS geology rates 74% of the county's land moderate radon potential. CDC also counts 34 tests taken after mitigation in Racine County for the same period: tests in homes where a fix was already in.
The busiest year on file was 2015, with 950 tests reported; the quietest, 2021, had 229.
Racine CountyWisconsin, pooled
| Year | Tests | Racine County, at or above 4 pCi/L | Wisconsin, pooled |
|---|---|---|---|
| 2014 | 697 | 55.1% | 51.1% |
| 2015 | 950 | 58.8% | 51.6% |
| 2016 | 765 | 54.6% | 45.2% |
| 2017 | 519 | 57.6% | 44.8% |
| 2019 | 422 | 50.9% | 42.9% |
| 2020 | 425 | 36.9% | 27.0% |
| 2021 | 229 | 47.2% | 39.9% |
| 2022 | 297 | 40.7% | 42.9% |
| 2023 | 445 | 37.3% | 35.7% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Racine County, Geology
The ground under Racine County
PredictedUSGS's geologic map splits Racine County: 74.3% of its land is moderate radon potential and 25.6% high. The map puts 74.3% of Racine County in the area it calls Eastern Ridges and Lowlands and 25.6% in Eastern Ridges and Lowlands. USGS gives the first a radon index of 10, in the moderate band (9 to 11), and the second 12, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Eastern Ridges and Lowlands | Carbonate-rich glacial silt, clay. | Moderate | 10 | 74.3% |
| Eastern Ridges and Lowlands | Glacial deposits derived from Ordovician carbonate rocks. | High | 12 | 25.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Racine County beside the ground around it
On high-potential ground Racine County is close to Wisconsin as a whole: 25.6% of its land against 34.8%. Of the 4 counties that border it, 3 have more high-potential ground, Walworth County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Racine County, Local resources
Radon testing and mitigation in Racine County
- Wisconsin's radon programWisconsin Department of Health ServicesWisconsin's radon program does not license radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in Wisconsin.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
We recommend starting with your regional Radon Information Center since many centers provide test kits for free or reduced cost, and often with laboratory fees covered.
- Compare kits
- Professionals in Wisconsin19 professionals are listed in Wisconsin.
What Wisconsin's program says
- Phone
- 1-888-569-7236
- DHSRadon@dhs.wisconsin.gov
- Licensing of radon professionals
The State of Wisconsin does not require contractors performing radon measurement or mitigation work to be state licensed or nationally certified.
What it means
Racine County, Questions
Questions about radon in Racine County
Are radon levels high in Racine County?
In 2023, 37.3% of the radon tests reported to CDC for Racine County, Wisconsin were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.7 pCi/L. Of 69 Wisconsin counties with 30 or more tests for the same period, 37 reported a higher share; pooled, the state comes to 35.7%.
Which counties border Racine County?
Racine County borders 4 counties: Kenosha County, Milwaukee County, Walworth County and Waukesha County.
Products
Racine County, Products
Testing a home in Racine County
In Racine County, 37.3% of 445 tests reported to CDC in 2023 reached 4 pCi/L, against 35.7% pooled across Wisconsin. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Racine County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
MonitorSafetySiren
Pro4 plug-in radon detector with a display and alarm
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
First reading: Within 48 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Racine County, Bordering counties
Counties bordering Racine County
Calculated by Radon411- Radon levels in Waukesha CountyEPA zone 1
43.2%at or above 4 pCi/L
Median 3.2 pCi/L · 1,633 tests · 5.9 points above Racine County
- Radon levels in Kenosha CountyEPA zone 2
42.4%at or above 4 pCi/L
Median 3.4 pCi/L · 415 tests · 5.1 points above Racine County
- Radon levels in Walworth CountyEPA zone 1
37.9%at or above 4 pCi/L
Median 2.8 pCi/L · 340 tests · 0.6 points above Racine County
- Radon levels in Milwaukee CountyEPA zone 2
20.2%at or above 4 pCi/L
Median 1.5 pCi/L · 2,605 tests · 17.1 points below Racine County
Racine County, Cities and towns
Cities and towns in Racine County
Racine County's population has barely moved since 2020: 198,919 residents on July 1, 2025 against 198,061 then, by the Census Bureau's estimates. That works out to 598 people per square mile of land. Its largest town, Racine, has 77,908 residents, 39.2% of the total. Reported testing is thin here: 445 tests over 2023, or 2.2 for every 1,000 residents (2025 estimate), where Wisconsin as a whole comes to 3.5.
From Racine to North Bay, CDC publishes no figure by town: each reads Racine County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Racine | 77,908 | −0.3% | 39.2% |
| Mount Pleasant | 28,253 | +1.7% | 14.2% |
| Caledonia | 25,229 | −0.3% | 12.7% |
| Burlingtonextends beyond Racine County | 10,951 | −0.9% | Counted whole |
| Sturtevant | 6,852 | −0.9% | 3.4% |
| Waterford | 6,025 | +8.2% | 3.0% |
| Union Grove | 5,370 | +11.4% | 2.7% |
| Raymond | 4,006 | +1.8% | 2.0% |
| Rochester | 3,786 | +0.5% | 1.9% |
| Yorkville | 3,253 | +0.1% | 1.6% |
| Wind Point | 1,620 | −1.8% | 0.8% |
| Elmwood Park | 495 | −2.0% | 0.2% |
- North Bay
13 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 Racine County is counted whole, so it has no share.
Racine County, Homes
Homes in Racine County
Of Racine County's 84,558 homes, 70% are detached houses, against 66% across Wisconsin; 14% are in buildings of five or more homes. Half of its homes were built before 1968, close to Wisconsin's 1975: 40% date from before 1960 and 13% from 2000 or later. 71% of occupied homes are lived in by their owner (Wisconsin: 68%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Racine County | Wisconsin |
|---|---|---|
| Housing units | 84,558 | 2,750,750 |
| Detached houses | 70% | 66% |
| In buildings of 5 or more | 14% | 17% |
| Mobile homes | 1% | 3% |
| Built before 1960 | 40% | 34% |
| Built since 2000 | 13% | 20% |
| Middle year built | 1968 | 1975 |
| Owner-occupied | 71% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.