Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
Locations and reports
Radon Levels in Pepin County, Wisconsin
EPA puts Pepin County in Zone 1, its highest radon zone, and 15.4% of its 65 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
15.4%
20.3 pts below WI
- Pepin
- 15.4%
- Wisconsin
- 35.7%
65 tests, 2023
Median result
1.2pCi/L
Below action level
- Pepin
- 1.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
65
51st of 69 by tests
- Pepin
- 65
- 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
65 of 69
Lowest quarter
- Pepin
- 15.4%
- Langlade
- 65.8%
By share, of 69 with 30+ tests
Read a result for Pepin County
Starts at Pepin County's median, 1.2 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.2 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. Pepin County's median reported result, 2023.
The data
Pepin County, At a glance
Pepin County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Pepin County in
USGS geologic potential: High across 55% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Pepin County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 40.0% |
| 2015 | 51.6% |
| 2016 | 48.9% |
| 2017 | 58.5% |
| 2019 | 81.8% |
| 2020 | 50.0% |
| 2021 | 43.5% |
| 2022 | 47.1% |
| 2023 | 15.4% |
2023: 15.4%. Across these years the share ran from 15.4% to 81.8%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 65 tests reported to CDC for Pepin 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).
Pepin County, Compared
Pepin County radon figures, compared
Calculated by Radon411Pepin County's 65 reported tests in 2023 had a middle value of 1.2 pCi/L and a maximum of 23.0 pCi/L, and 15.4% reached 4 pCi/L. Wisconsin as a whole (72 Wisconsin counties, pooled) comes to 35.7%: 20.3 points higher than here.
Among its state's counties it ranks 65th of 69 Wisconsin counties with 30 or more tests for the same period. Statewide for the same period, Langlade County reported the highest share (65.8%) and Bayfield County the lowest (5.7%).
Below the action level, 39 tests (60.0%) came in under 2 pCi/L, against 41.4% statewide, and 16 tests (24.6%) fell between 2 and 4, against 23.0% statewide. The busiest year on file was 2015, with 95 tests reported; the quietest, 2014, had 10.
EPA's 1993 zone map puts Pepin County in Zone 1, a predicted county average above 4 pCi/L. USGS geology rates 55% of the county's land high radon potential.
Next door, the shares run from 30.9% in Pierce County to 53.6% in Buffalo County. Over 6 years of annual figures the share fell 36.2 points, from 51.6% in 2015 to 15.4% in 2023; its peak was 58.5% in 2017.
Pepin CountyWisconsin, pooled
15.4% % of tests35.7% % of tests
| Year | Tests | Pepin County, at or above 4 pCi/L | Wisconsin, pooled |
|---|---|---|---|
| 2015 | 95 | 51.6% | 51.6% |
| 2016 | 45 | 48.9% | 45.2% |
| 2017 | 41 | 58.5% | 44.8% |
| 2021 | 92 | 43.5% | 39.9% |
| 2022 | 34 | 47.1% | 42.9% |
| 2023 | 65 | 15.4% | 35.7% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Pepin County, Geology
The ground under Pepin County
PredictedUSGS's geologic map splits Pepin County: 55.2% of its land is high radon potential and 44.8% moderate. The map puts 54.1% of Pepin County in the area it calls Driftless Area and 43.5% in Driftless Area, with 2 smaller areas beside them. USGS gives the first a radon index of 12, 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 |
|---|---|---|---|---|
| Driftless Area | Ordovician carbonate rocks. | High | 12 | 54.1% |
| Driftless Area | Cambrian sandstone. | Moderate | 10 | 43.5% |
| Central Plain/Northern Highland | Pre-Late Wisconsinan glacial deposits derived from sandstone and carbonate rocks. | Moderate | 10 | 1.3% |
| Driftless Section | Ordivician carbonates and sandstones. | High | 12 | 0.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Pepin County beside the ground around it
Pepin County has more high-potential ground than Wisconsin as a whole: 55.2% of its land against 34.8%. Of the 6 counties that border it, 4 have more high-potential ground, Goodhue County, MN the most at 100%.
The map rates the ground, not the air in any home.
Local help
Pepin County, Local resources
Radon testing and mitigation in Pepin 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
Pepin County, Questions
Questions about radon in Pepin County
Are radon levels high in Pepin County?
In 2023, 15.4% of the radon tests reported to CDC for Pepin County, Wisconsin were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.2 pCi/L. Of 69 Wisconsin counties with 30 or more tests for the same period, 64 reported a higher share; pooled, the state comes to 35.7%.
Which counties border Pepin County?
Pepin County borders 6 counties: Pierce County, WI, Wabasha County, MN, Buffalo County, WI, Dunn County, WI, Goodhue County, MN and Eau Claire County, WI.
Products
Pepin County, Products
Testing a home in Pepin County
In Pepin County, 15.4% of 65 tests reported to CDC in 2023 reached 4 pCi/L, against 35.7% pooled across Wisconsin. In Zone 1 the year-round level in Pepin 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
MonitorINKBIRD
INK-RD3 battery radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Screen
First reading: Within 24 hours
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
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Pepin County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Pepin County
Explore
Pepin County, Bordering counties
Counties bordering Pepin County
Calculated by Radon411- Radon levels in Buffalo County, WIEPA zone 1
53.6%at or above 4 pCi/L
Median 4.4 pCi/L · 56 tests · 38.2 points above Pepin County
- Radon levels in Goodhue County, MNEPA zone 1
49.5%at or above 4 pCi/L
Median 3.9 pCi/L · 218 tests · 34.1 points above Pepin County
- Radon levels in Wabasha County, MNEPA zone 1
42.3%at or above 4 pCi/L
Median 3.3 pCi/L · 111 tests · 26.9 points above Pepin County
- Radon levels in Dunn County, WIEPA zone 2
37.4%at or above 4 pCi/L
Median 2.9 pCi/L · 171 tests · 22.0 points above Pepin County
- Radon levels in Eau Claire County, WIEPA zone 2
32.7%at or above 4 pCi/L
Median 2.8 pCi/L · 474 tests · 17.3 points above Pepin County
- Radon levels in Pierce County, WIEPA zone 1
30.9%at or above 4 pCi/L
Median 2.7 pCi/L · 136 tests · 15.5 points above Pepin County
Pepin County, Cities and towns
Cities and towns in Pepin County
The Census Bureau estimates 7,513 residents in Pepin County for July 1, 2025, 164 more than in 2020 (+2.2%). That works out to 32 people per square mile of land. Its largest town, Durand, has 1,854 residents, 24.7% of the total. Together its 3 incorporated places hold 35.7% of those residents; the other 64.3% live outside any of them. Testing is reported here more often than across the state: CDC's 65 reported tests for 2023 come to 8.7 for every 1,000 residents (2025 estimate), against 3.5 for Wisconsin.
From Durand to Stockholm, CDC publishes no figure by town: each reads Pepin County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Durand | 1,854 | −0.3% | 24.7% |
| Pepin | 743 | +1.1% | 9.9% |
| Stockholm | 87 | +10.1% | 1.2% |
3 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).
Pepin County, Homes
Homes in Pepin County
Pepin County is a place of houses on their own lots: 85% of its 3,603 homes are detached single-family houses, against 66% across Wisconsin. Half of its homes were built before 1970, close to Wisconsin's 1975: 41% date from before 1960 and 21% from 2000 or later. Owners live in 84% of the occupied homes (Wisconsin: 68%), so for most households a test and a fix are their own to order.
| Homes | Pepin County | Wisconsin |
|---|---|---|
| Housing units | 3,603 | 2,750,750 |
| Detached houses | 85% | 66% |
| In buildings of 5 or more | 5% | 17% |
| Mobile homes | 4% | 3% |
| Built before 1960 | 41% | 34% |
| Built since 2000 | 21% | 20% |
| Middle year built | 1970 | 1975 |
| Owner-occupied | 84% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.