Short-term kit
RA400 short-term liquid scintillation radon test kit, lab fee included
- Lab fee included
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Juneau County, Wisconsin
EPA puts Juneau County in Zone 2, its middle radon zone, and most reported tests there come back low, though 10.0% of 50 (2023) reached 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
10.0%
25.7 pts below WI
- Juneau
- 10.0%
- Wisconsin
- 35.7%
50 tests, 2023
Median result
1.1pCi/L
Below action level
- Juneau
- 1.1 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
50
58th of 69 by tests
- Juneau
- 50
- 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
67 of 69
Lowest quarter
- Juneau
- 10.0%
- Langlade
- 65.8%
By share, of 69 with 30+ tests
Read a result for Juneau County
Starts at Juneau County's median, 1.1 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.1 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. Juneau County's median reported result, 2023.
The data
Juneau County, At a glance
Juneau County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Juneau County is a
USGS geologic potential: Moderate across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Juneau County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 12.0% |
| 2015 | 26.3% |
| 2016 | 35.0% |
| 2017 | 12.9% |
| 2019 | 20.0% |
| 2020 | 26.5% |
| 2021 | 52.0% |
| 2022 | 22.2% |
| 2023 | 10.0% |
2023: 10.0%. Across these years the share ran from 10.0% to 52.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 50 tests reported to CDC for Juneau 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).
Juneau County, Compared
Juneau County radon figures, compared
Calculated by Radon411Juneau County reports fewer high tests than Wisconsin overall. 10.0% of its 50 tests in 2023 were at or above 4 pCi/L. That is 25.7 points below the 35.7% pooled from 72 Wisconsin counties.
Ordered from highest share down, it comes 67th of 69 Wisconsin counties with 30 or more tests for the same period. Nationally, every county with a figure for the same period pools to 33.4%; Juneau County sits 23.4 points below it.
Next door, the shares run from 18.3% in Wood County to 47.5% in Vernon County. Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 10.0% share point the same way here.
Half the tests came in under 1.1 pCi/L and half over it; the single highest reached 6.8 pCi/L. The rest split 80.0% under 2 pCi/L and 10.0% from 2 to 4 (Wisconsin: 41.4% and 23.0%). Year by year, 2016 opened at 35.0% and 2023 closed at 10.0% (down 25.0 points), with 2016 the high at 35.0%.
The busiest year on file was 2023, with 50 tests reported; the quietest, 2015, had 19.
Juneau CountyWisconsin, pooled
10.0% % of tests35.7% % of tests
| Year | Tests | Juneau County, at or above 4 pCi/L | Wisconsin, pooled |
|---|---|---|---|
| 2016 | 40 | 35.0% | 45.2% |
| 2017 | 31 | 12.9% | 44.8% |
| 2019 | 30 | 20.0% | 42.9% |
| 2020 | 34 | 26.5% | 27.0% |
| 2022 | 45 | 22.2% | 42.9% |
| 2023 | 50 | 10.0% | 35.7% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Juneau County, Geology
The ground under Juneau County
PredictedUSGS's geologic map puts all of Juneau County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Driftless Area, to which USGS gives a radon index of 10, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Driftless Area | Cambrian sandstone. | Moderate | 10 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Juneau County beside the ground around it
Across Wisconsin 34.8% of the land is rated high; none of Juneau County's is. Of the 7 counties that border it, 5 have more high-potential ground, Vernon County the most at 83.1%.
The map rates the ground, not the air in any home.
Local help
Juneau County, Local resources
Radon testing and mitigation in Juneau 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
Juneau County, Questions
Questions about radon in Juneau County
Are radon levels high in Juneau County?
In 2023, 10.0% of the radon tests reported to CDC for Juneau County, Wisconsin were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.1 pCi/L. Of 69 Wisconsin counties with 30 or more tests for the same period, 66 reported a higher share; pooled, the state comes to 35.7%.
Which counties border Juneau County?
Juneau County borders 7 counties: Adams County, Monroe County, Wood County, Sauk County, Jackson County, Vernon County and Columbia County.
Products
Juneau County, Products
Testing a home in Juneau County
In Juneau County, 10.0% of 50 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 Juneau 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
MonitorAEGTEST
HOUND-3786 rechargeable radon monitor with a 3.5-inch color screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Juneau County, Bordering counties
Counties bordering Juneau County
Calculated by Radon411- Radon levels in Vernon CountyEPA zone 1
47.5%at or above 4 pCi/L
Median 3.8 pCi/L · 162 tests · 37.5 points above Juneau County
- Radon levels in Sauk CountyEPA zone 2
41.1%at or above 4 pCi/L
Median 3.3 pCi/L · 241 tests · 31.1 points above Juneau County
- Radon levels in Jackson CountyEPA zone 2
38.7%at or above 4 pCi/L
Median 3.2 pCi/L · 93 tests · 28.7 points above Juneau County
- Radon levels in Columbia CountyEPA zone 2
28.8%at or above 4 pCi/L
Median 2.0 pCi/L · 163 tests · 18.8 points above Juneau County
- Radon levels in Monroe CountyEPA zone 2
22.5%at or above 4 pCi/L
Median 2.2 pCi/L · 213 tests · 12.5 points above Juneau County
- Radon levels in Adams CountyEPA zone 2
20.8%at or above 4 pCi/L
Median 1.7 pCi/L · 48 tests · 10.8 points above Juneau County
- Radon levels in Wood CountyEPA zone 1
18.3%at or above 4 pCi/L
Median 1.4 pCi/L · 208 tests · 8.3 points above Juneau County
Juneau County, Cities and towns
Cities and towns in Juneau County
Juneau County's population has barely moved since 2020: 26,649 residents on July 1, 2025 against 26,779 then, by the Census Bureau's estimates. That works out to 35 people per square mile of land. No town dominates: Mauston, the largest, has 4,133 residents, 15.5% of the total. Reported testing is thin here: 50 tests over 2023, or 1.9 for every 1,000 residents (2025 estimate), where Wisconsin as a whole comes to 3.5.
From Mauston to Hustler, CDC publishes no figure by town: each reads Juneau County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Mauston | 4,133 | −5.1% | 15.5% |
| Wisconsin Dellsextends beyond Juneau County | 3,149 | +4.5% | Counted whole |
| New Lisbon | 2,577 | +0.1% | 9.7% |
| Elroy | 1,255 | −7.4% | 4.7% |
| Necedah | 911 | −2.7% | 3.4% |
| Wonewoc | 723 | −4.7% | 2.7% |
| Camp Douglas | 627 | −3.5% | 2.4% |
| Lyndon Station | 473 | −4.3% | 1.8% |
| Union Center | 220 | −3.9% | 0.8% |
| Hustler | 159 | −4.2% | 0.6% |
10 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond Juneau County is counted whole, so it has no share.
Juneau County, Homes
Homes in Juneau County
Of Juneau County's 14,639 homes, 70% are detached houses, against 66% across Wisconsin; 19% are mobile homes. Half of its homes were built before 1980, close to Wisconsin's 1975: 27% date from before 1960 and 23% from 2000 or later. Owners live in 78% of the occupied homes (Wisconsin: 68%), so for most households a test and a fix are their own to order.
| Homes | Juneau County | Wisconsin |
|---|---|---|
| Housing units | 14,639 | 2,750,750 |
| Detached houses | 70% | 66% |
| In buildings of 5 or more | 6% | 17% |
| Mobile homes | 19% | 3% |
| Built before 1960 | 27% | 34% |
| Built since 2000 | 23% | 20% |
| Middle year built | 1980 | 1975 |
| Owner-occupied | 78% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.