Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
Locations and reports
Radon Levels in Chippewa County, Wisconsin
EPA puts Chippewa County in Zone 2, its middle radon zone, and 35.7% of its 311 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
35.7%
0.0 pts above WI
- Chippewa
- 35.7%
- Wisconsin
- 35.7%
311 tests, 2023
Median result
2.5pCi/L
Below action level
- Chippewa
- 2.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
311
21st of 69 by tests
- Chippewa
- 311
- 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
40 of 69
Middle half
- Chippewa
- 35.7%
- Langlade
- 65.8%
By share, of 69 with 30+ tests
Read a result for Chippewa County
Starts at Chippewa County's median, 2.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.5 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. Chippewa County's median reported result, 2023.
The data
Chippewa County, At a glance
Chippewa County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Chippewa 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 Chippewa County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 53.1% |
| 2015 | 58.2% |
| 2016 | 51.1% |
| 2017 | 50.8% |
| 2019 | 47.8% |
| 2020 | 49.4% |
| 2021 | 27.4% |
| 2022 | 52.3% |
| 2023 | 35.7% |
2023: 35.7%. Across these years the share ran from 27.4% to 58.2%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 311 tests reported to CDC for Chippewa 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).
Chippewa County, Compared
Chippewa County radon figures, compared
Calculated by Radon411In Chippewa County, about 4 in 10 reported tests in 2023 (111 of 311) were at or above EPA's action level. Against the national pool of 33.4%, the gap is 2.3 points higher. Pooled across 72 Wisconsin counties, the share is the same 35.7%.
Of 6 neighbours with a figure, 2 reported a larger share at or above 4 pCi/L and 4 a smaller one; the spread is 18.9% (Taylor County) to 38.6% (Rusk County). By share, Chippewa County is 40th of 69 Wisconsin counties with 30 or more tests for the same period.
Year by year, 2014 opened at 53.1% and 2023 closed at 35.7% (down 17.4 points), with 2015 the high at 58.2%. Half the tests came in under 2.5 pCi/L and half over it; the single highest reached 24.3 pCi/L. Below the action level, 125 tests (40.2%) came in under 2 pCi/L, against 41.4% statewide, and 75 tests (24.1%) 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 35.7% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential. CDC also counts 13 tests taken after mitigation in Chippewa County for the same period: tests in homes where a fix was already in.
The busiest year on file was 2023, with 311 tests reported; the quietest, 2014, had 147.
Chippewa CountyWisconsin, pooled
| Year | Tests | Chippewa County, at or above 4 pCi/L | Wisconsin, pooled |
|---|---|---|---|
| 2014 | 147 | 53.1% | 51.1% |
| 2015 | 225 | 58.2% | 51.6% |
| 2016 | 282 | 51.1% | 45.2% |
| 2017 | 185 | 50.8% | 44.8% |
| 2019 | 184 | 47.8% | 42.9% |
| 2020 | 154 | 49.4% | 27.0% |
| 2021 | 197 | 27.4% | 39.9% |
| 2022 | 193 | 52.3% | 42.9% |
| 2023 | 311 | 35.7% | 35.7% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Chippewa County, Geology
The ground under Chippewa County
PredictedUSGS's geologic map puts all of Chippewa County's mapped land in one class: moderate radon potential. The map puts 55.5% of Chippewa County in the area it calls Chippewa, Wisconsin Valley, and Langlade sublobes of the Superior Lobe and 44.5% in Central Plain/Northern Highland. USGS gives both 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 |
|---|---|---|---|---|
| Chippewa, Wisconsin Valley, and Langlade sublobes of the Superior Lobe | Granite, granite-derived glacial deposits, and mafic volcanic rocks. | Moderate | 10 | 55.5% |
| Central Plain/Northern Highland | Pre-Late Wisconsinan glacial deposits derived from sandstone and carbonate rocks. | Moderate | 10 | 44.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Chippewa County beside the ground around it
Across Wisconsin 34.8% of the land is rated high; none of Chippewa County's is. Of the 6 counties that border it, 2 have more high-potential ground, Dunn County the most at 9.7%.
The map rates the ground, not the air in any home.
Local help
Chippewa County, Local resources
Radon testing and mitigation in Chippewa 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
Chippewa County, Questions
Questions about radon in Chippewa County
Are radon levels high in Chippewa County?
In 2023, 35.7% of the radon tests reported to CDC for Chippewa County, Wisconsin were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.5 pCi/L. Of 69 Wisconsin counties with 30 or more tests for the same period, 39 reported a higher share; pooled, the state comes to 35.7%.
Which counties border Chippewa County?
Chippewa County borders 6 counties: Eau Claire County, Dunn County, Rusk County, Barron County, Clark County and Taylor County.
Products
Chippewa County, Products
Testing a home in Chippewa County
In Chippewa County, 35.7% of 311 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 Chippewa County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
MonitorX-Sense
XR0B-SR battery digital radon monitor with an alarm
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Alpha spectrometry
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Chippewa County, Bordering counties
Counties bordering Chippewa County
Calculated by Radon411- Radon levels in Rusk CountyEPA zone 2
38.6%at or above 4 pCi/L
Median 3.2 pCi/L · 57 tests · 2.9 points above Chippewa County
- Radon levels in Dunn CountyEPA zone 2
37.4%at or above 4 pCi/L
Median 2.9 pCi/L · 171 tests · 1.7 points above Chippewa County
- Radon levels in Barron CountyEPA zone 2
34.7%at or above 4 pCi/L
Median 2.5 pCi/L · 199 tests · 1.0 points below Chippewa County
- Radon levels in Eau Claire CountyEPA zone 2
32.7%at or above 4 pCi/L
Median 2.8 pCi/L · 474 tests · 3.0 points below Chippewa County
- Radon levels in Clark CountyEPA zone 2
25.3%at or above 4 pCi/L
Median 2.2 pCi/L · 75 tests · 10.4 points below Chippewa County
- Radon levels in Taylor CountyEPA zone 2
18.9%at or above 4 pCi/L
Median 2.1 pCi/L · 37 tests · 16.8 points below Chippewa County
Chippewa County, Cities and towns
Cities and towns in Chippewa County
The Census Bureau estimates 67,614 residents in Chippewa County for July 1, 2025, 1,280 more than in 2020 (+1.9%). That works out to 67 people per square mile of land. Eau Claire, the largest place on its list (72,465 residents in all), extends beyond Chippewa County, so no share of the total is worked out for it. CDC's 311 reported tests for 2023 work out to 4.6 per 1,000 residents (2025 estimate), close to Wisconsin's 3.5.
From Eau Claire to New Auburn, CDC publishes no figure by town: each reads Chippewa County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Eau Claireextends beyond Chippewa County | 72,465 | +4.3% | Counted whole |
| Chippewa Falls | 15,293 | +3.8% | 22.6% |
| Lake Hallie | 7,396 | +2.8% | 10.9% |
| Stanleyextends beyond Chippewa County | 3,876 | +1.8% | Counted whole |
| Bloomer | 3,634 | −1.0% | 5.4% |
| Cadott | 1,473 | −1.7% | 2.2% |
| Cornell | 1,443 | −0.8% | 2.1% |
| Boyd | 603 | +0.2% | 0.9% |
| New Auburnextends beyond Chippewa County | 574 | +1.2% | Counted whole |
9 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 Chippewa County is counted whole, so it has no share.
Chippewa County, Homes
Homes in Chippewa County
Chippewa County is a place of houses on their own lots: 76% of its 29,017 homes are detached single-family houses, against 66% across Wisconsin. Half of its homes were built before 1978, close to Wisconsin's 1975: 32% date from before 1960 and 23% from 2000 or later. 75% 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 | Chippewa County | Wisconsin |
|---|---|---|
| Housing units | 29,017 | 2,750,750 |
| Detached houses | 76% | 66% |
| In buildings of 5 or more | 6% | 17% |
| Mobile homes | 4% | 3% |
| Built before 1960 | 32% | 34% |
| Built since 2000 | 23% | 20% |
| Middle year built | 1978 | 1975 |
| Owner-occupied | 75% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.