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
Locations and reports
Radon Levels in Shawano County, Wisconsin
EPA puts Shawano County in Zone 1, its highest radon zone, and high results are common there: 57.0% of the 114 radon tests reported to CDC (2023) 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
57.0%
21.3 pts above WI
- Shawano
- 57.0%
- Wisconsin
- 35.7%
114 tests, 2023
Median result
5.0pCi/L
Action level reached
- Shawano
- 5.0 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
114
43rd of 69 by tests
- Shawano
- 114
- Dane
- 2,887
Reported to CDC before any fix, 2023
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Rank in Wisconsin
3 of 69
Top quarter
- Shawano
- 57.0%
- Langlade
- 65.8%
By share, of 69 with 30+ tests
Read a result for Shawano County
Starts at Shawano County's median, 5.0 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 5.0 pCi/L
At or above 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 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. Shawano County's median reported result, 2023.
The data
Shawano County, At a glance
Shawano County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Shawano County in
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 Shawano County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 38.9% |
| 2015 | 56.9% |
| 2016 | 11.2% |
| 2017 | 62.9% |
| 2019 | 59.5% |
| 2020 | 45.2% |
| 2021 | 57.1% |
| 2022 | 65.4% |
| 2023 | 57.0% |
2023: 57.0%. Across these years the share ran from 11.2% to 65.4%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 114 tests reported to CDC for Shawano 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).
Shawano County, Compared
Shawano County radon figures, compared
Calculated by Radon411More than half: 57.0% of the 114 radon tests reported to CDC for Shawano County in 2023 read at least 4 pCi/L. That places it 3rd of 69 Wisconsin counties with 30 or more tests for the same period. That is 21.3 points above the 35.7% pooled from 72 Wisconsin counties.
The median result, 5.0 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 111.6 pCi/L. The rest split 25.4% under 2 pCi/L and 17.5% from 2 to 4 (Wisconsin: 41.4% and 23.0%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 57.0% share point the same way here.
1 of its 7 bordering counties with figures ran higher, led by Langlade County at 65.8%; Brown County reported 23.0%. Statewide for the same period, Langlade County reported the highest share (65.8%) and Bayfield County the lowest (5.7%).
The busiest year on file was 2016, with 249 tests reported; the quietest, 2021, had 35.
Over 9 years of annual figures the share rose 18.1 points, from 38.9% in 2014 to 57.0% in 2023; its peak was 65.4% in 2022. Nationally, every county with a figure for the same period pools to 33.4%; Shawano County sits 23.6 points above it. CDC also counts 8 tests taken after mitigation in Shawano County for the same period: tests in homes where a fix was already in.
Shawano CountyWisconsin, pooled
57.0% % of tests35.7% % of tests
| Year | Tests | Shawano County, at or above 4 pCi/L | Wisconsin, pooled |
|---|---|---|---|
| 2014 | 72 | 38.9% | 51.1% |
| 2015 | 51 | 56.9% | 51.6% |
| 2016 | 249 | 11.2% | 45.2% |
| 2017 | 70 | 62.9% | 44.8% |
| 2019 | 37 | 59.5% | 42.9% |
| 2020 | 42 | 45.2% | 27.0% |
| 2021 | 35 | 57.1% | 39.9% |
| 2022 | 52 | 65.4% | 42.9% |
| 2023 | 114 | 57.0% | 35.7% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Shawano County, Geology
The ground under Shawano County
PredictedUSGS's geologic map splits Shawano County: 63.3% of its land is high radon potential and 36.7% moderate. The map puts 63.3% of Shawano County in the area it calls Wolf River Batholith and 36.7% in Green Bay Lobe. USGS gives the first a radon index of 13, in the high band (12 to 17), and the second 10, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Wolf River Batholith | Plutonic granitic rocks including quartz monzonite, syenite, monzonite, anorthosite. | High | 13 | 63.3% |
| Green Bay Lobe | Glacial deposits derived from carbonate and igneous rocks. | Moderate | 10 | 36.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Shawano County beside the ground around it
Shawano County has more high-potential ground than Wisconsin as a whole: 63.3% of its land against 34.8%. Of the 8 counties that border it, 4 have more high-potential ground, Menominee County the most at 98.0%.
The map rates the ground, not the air in any home.
Local help
Shawano County, Local resources
Radon testing and mitigation in Shawano 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
Shawano County, Questions
Questions about radon in Shawano County
Are radon levels high in Shawano County?
In 2023, 57.0% of the radon tests reported to CDC for Shawano County, Wisconsin were at or above 4 pCi/L, and the median reported pre-mitigation result was 5.0 pCi/L. Of 69 Wisconsin counties with 30 or more tests for the same period, 2 reported a higher share; pooled, the state comes to 35.7%.
Which counties border Shawano County?
Shawano County borders 8 counties: Menominee County, Oconto County, Waupaca County, Outagamie County, Langlade County, Brown County, Portage County and Marathon County.
Products
Shawano County, Products
Testing a home in Shawano County
In Shawano County, 57.0% of 114 tests reported to CDC in 2023 reached 4 pCi/L, against 35.7% pooled across Wisconsin. In Zone 1 the year-round level in Shawano 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
Monitor
RM-65 rechargeable radon detector with a color screen and alarm
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
Short-term kit
RA100 short-term liquid scintillation radon test kit
- Lab fee extra
Method: Liquid scintillation
In home: 48 to 96 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Shawano County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Shawano County
Explore
Shawano County, Bordering counties
Counties bordering Shawano County
Calculated by Radon411- Radon levels in Menominee CountyEPA zone 1
100.0%at or above 4 pCi/L
Median 11.0 pCi/L · 3 tests · 43.0 points above Shawano County
- Radon levels in Langlade CountyEPA zone 1
65.8%at or above 4 pCi/L
Median 6.0 pCi/L · 225 tests · 8.8 points above Shawano County
- Radon levels in Waupaca CountyEPA zone 1
52.8%at or above 4 pCi/L
Median 4.3 pCi/L · 127 tests · 4.2 points below Shawano County
- Radon levels in Oconto CountyEPA zone 2
52.3%at or above 4 pCi/L
Median 4.5 pCi/L · 130 tests · 4.7 points below Shawano County
- Radon levels in Marathon CountyEPA zone 1
51.9%at or above 4 pCi/L
Median 4.3 pCi/L · 349 tests · 5.1 points below Shawano County
- Radon levels in Outagamie CountyEPA zone 2
40.7%at or above 4 pCi/L
Median 3.1 pCi/L · 337 tests · 16.3 points below Shawano County
- Radon levels in Portage CountyEPA zone 1
35.6%at or above 4 pCi/L
Median 3.0 pCi/L · 334 tests · 21.4 points below Shawano County
- Radon levels in Brown CountyEPA zone 2
23.0%at or above 4 pCi/L
Median 1.4 pCi/L · 551 tests · 34.0 points below Shawano County
Shawano County, Cities and towns
Cities and towns in Shawano County
The Census Bureau estimates 41,560 residents in Shawano County for July 1, 2025, 701 more than in 2020 (+1.7%). That works out to 47 people per square mile of land. Its largest town, Shawano, has 9,693 residents, 23.3% of the total. CDC's 114 reported tests for 2023 work out to 2.7 per 1,000 residents (2025 estimate), close to Wisconsin's 3.5.
From Shawano to Eland, CDC publishes no figure by town: each reads Shawano County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Shawano | 9,693 | +4.9% | 23.3% |
| Pulaskiextends beyond Shawano County | 4,048 | +4.4% | Counted whole |
| Bonduel | 1,409 | −0.3% | 3.4% |
| Marionextends beyond Shawano County | 1,273 | −3.0% | Counted whole |
| Wittenberg | 979 | −3.0% | 2.4% |
| Birnamwoodextends beyond Shawano County | 730 | +0.4% | Counted whole |
| Tigerton | 708 | +0.3% | 1.7% |
| Cecil | 537 | +1.7% | 1.3% |
| Gresham | 537 | +1.5% | 1.3% |
| Mattoon | 356 | −1.4% | 0.9% |
| Bowler | 308 | −1.6% | 0.7% |
| Aniwa | 236 | −3.3% | 0.6% |
- Eland
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 Shawano County is counted whole, so it has no share.
Shawano County, Homes
Homes in Shawano County
Shawano County is a place of houses on their own lots: 79% of its 20,430 homes are detached single-family houses, against 66% across Wisconsin. Half of its homes were built before 1975, close to Wisconsin's 1975: 35% date from before 1960 and 19% from 2000 or later. Owners live in 79% of the occupied homes (Wisconsin: 68%), so for most households a test and a fix are their own to order.
| Homes | Shawano County | Wisconsin |
|---|---|---|
| Housing units | 20,430 | 2,750,750 |
| Detached houses | 79% | 66% |
| In buildings of 5 or more | 7% | 17% |
| Mobile homes | 7% | 3% |
| Built before 1960 | 35% | 34% |
| Built since 2000 | 19% | 20% |
| Middle year built | 1975 | 1975 |
| Owner-occupied | 79% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.