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Radon Levels in Hutchinson County, South Dakota

EPA puts Hutchinson County in Zone 1, its highest radon zone, and high results are common there: 66.7% of the 39 radon tests reported to CDC (2008 to 2017, laboratory totals) 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

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  • Share at 4+ pCi/L

    66.7%

    8.2 pts above SD

    Hutchinson
    66.7%
    SD
    58.5%

    39 tests, 2008 to 2017

  • Median result

    5.8pCi/L

    Action level reached

    Hutchinson
    5.8 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    39

    21st of 23 by tests

    Hutchinson
    39
    Minnehaha
    1,920

    Reported to CDC before any fix, 2008 to 2017

  • EPA radon zone

    Zone 1

    Highest potential

    1. Zone 1
    2. 2
    3. 3

    1 highest, 3 lowest

    EPA predicts over 4 pCi/L indoors

  • Rank in SD

    9 of 23

    Middle half

    Hutchinson
    66.7%
    Lake
    76.0%

    By share, of 23 with 30+ tests

Read a result for Hutchinson County

Starts at Hutchinson County's median, 5.8 pCi/L

5.8pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 5.8 pCi/L

At or above 4 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 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. Hutchinson County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Hutchinson County, At a glance

Hutchinson County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

EPA puts all of Hutchinson County in and predicts an average indoor of greater than 4 pCi/L (greater than 150 Bq/m³) across the county. That is one forecast for the whole county, not a reading of any address in it; homes above EPA's turn up in all three zones.

USGS geologic potential: High across 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Hutchinson County, 2008 to 2017, laboratory

Reported results by concentration band, Hutchinson County, 2008 to 2017, laboratory
Under 2 pCi/L: 20%2 to 4 pCi/L: 13%4 pCi/L and above: 67%

Of 39 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Hutchinson County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L820.5%
2 to 4 pCi/L512.8%
4 pCi/L and above2666.7%
What these figures count

These are the 39 tests reported to CDC for Hutchinson County over 2008 to 2017 (laboratory totals), 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: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).

How to read these figures

Hutchinson County, Compared

Hutchinson County radon figures, compared

Calculated by Radon411

More than half: 66.7% of the 39 radon tests reported to CDC for Hutchinson County over the 2008 to 2017 laboratory totals read at least 4 pCi/L. That places it 9th of 23 South Dakota counties with 30 or more tests for the same period. That is 8.2 points above the 58.5% pooled from 62 South Dakota counties.

The median result, 5.8 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 26.3 pCi/L. The rest split 20.5% under 2 pCi/L and 12.8% from 2 to 4 (South Dakota: 23.6% and 17.9%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 66.7% share point the same way here.

2 of its 5 bordering counties with figures ran higher, led by Bon Homme County at 74.2%; Davison County reported 48.8%. Statewide for the same period, Lake County reported the highest share (76.0%) and Davison County the lowest (48.8%).

CDC's ten-year totals for Hutchinson County went from 25 tests (2005 to 2014) to 39 (2008 to 2017), the share going from 72.0% to 66.7%.

Nationally, every county with a figure for the same period pools to 35.7%; Hutchinson County sits 31.0 points above it.

Hutchinson County against South Dakota, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Hutchinson County
Hutchinson County3966.7%5.8 pCi/LThis county
South Dakota, pooled62 counties, pooled6,27558.5%Not pooled−8.2 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled−31.0 points
Lake Countyhighest in the state5076.0%8.5 pCi/L+9.3 points
Union Countylowest in the state34851.1%4.1 pCi/L−15.6 points
Bon Homme County, SDborders it6274.2%7.2 pCi/L+7.5 points
Yankton County, SDborders it11872.9%6.3 pCi/L+6.2 points
Charles Mix County, SDborders it2860.7%6.5 pCi/L−6.0 points
Turner County, SDborders it5858.6%4.8 pCi/L−8.1 points
McCook County, SDborders it3050.0%3.9 pCi/L−16.7 points
Davison County, SDborders it8448.8%3.8 pCi/L−17.9 points
Hanson County, SDborders it825.0%2.8 pCi/L−41.7 points
Douglas County, SDborders it30.0%1.3 pCi/L−66.7 points
Where Hutchinson County's reported results fell, 2008 to 2017, laboratory, beside South Dakota and the United States
ResultHutchinson County testsHutchinson County shareSouth Dakota shareU.S. shareAgainst South Dakota
Under 2 pCi/L820.5%23.6%39.6%−3.1 points
2 to 4 pCi/L512.8%17.9%24.7%−5.1 points
4 pCi/L and above2666.7%58.5%35.7%+8.2 points
Hutchinson County ranked among the 23 South Dakota counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Brown County4 of 236271.0%5.9 pCi/L
Hughes County5 of 237170.4%5.7 pCi/L
Brookings County6 of 2335668.5%6.6 pCi/L
Kingsbury County7 of 234468.2%7.4 pCi/L
Brule County8 of 233767.6%6.4 pCi/L
Hutchinson County9 of 233966.7%5.8 pCi/L
Custer County10 of 2310865.7%6.2 pCi/L
Codington County11 of 237764.9%5.8 pCi/L
Beadle County12 of 235459.3%4.8 pCi/L
Turner County13 of 235858.6%4.8 pCi/L
Minnehaha County14 of 231,92058.5%4.8 pCi/L
Hutchinson County ten-year laboratory totals, against South Dakota's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestSouth Dakota, pooledChange from the row before
2008 to 20173966.7%5.8 pCi/L26.3 pCi/L58.5%−3.3 points
2007 to 20163070.0%7.0 pCi/L22.9 pCi/L57.4%−6.0 points
2006 to 20152576.0%8.2 pCi/L22.9 pCi/L58.8%+4.0 points
2005 to 20142572.0%8.2 pCi/L22.9 pCi/L59.6%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

Hutchinson County, Geology

The ground under Hutchinson County

Predicted

USGS's geologic map puts all of Hutchinson County's mapped land in one class: high radon potential. All of it lies in the area the map calls Missouri Coteau/James River Lowland/Coteau des Prairies, to which USGS gives a radon index of 14, in the high band (12 to 17).

USGS's geologic areas under Hutchinson County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Missouri Coteau/James River Lowland/Coteau des PrairiesGlacial drift derived largely from Cretaceous marine shale.High14100%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Hutchinson County beside the ground around it

Hutchinson County has more high-potential ground than South Dakota as a whole: 100% of its land against 56.7%. Of the 8 counties that border it, none has as large a share of high-potential ground; Bon Homme County comes nearest at 100%.

Share of land by USGS radon potential: Hutchinson County, the 8 counties bordering it and South Dakota
AreaEPA zoneLow potentialModerate potentialHigh potential
Hutchinson CountyZone 1NoneNone100%
Hanson CountyZone 1NoneNone100%
Douglas CountyZone 1NoneNone100%
Bon Homme CountyZone 1NoneNone100%
Turner CountyZone 1NoneNone100%
McCook CountyZone 1NoneNone100%
Yankton CountyZone 1NoneNone100%
Davison CountyZone 1NoneNone100%
Charles Mix CountyZone 1None0.2%99.8%
South Dakota66 counties, pooled by land areaVaries1.0%42.3%56.7%

The map rates the ground, not the air in any home.

Local help

Hutchinson County, Local resources

Radon testing and mitigation in Hutchinson County

What South Dakota's program says
Phone
1-800-438-3367

What it means

Hutchinson County, Questions

Questions about radon in Hutchinson County

Are radon levels high in Hutchinson County?

Over the 2008 to 2017 laboratory totals, 66.7% of the radon tests reported to CDC for Hutchinson County, South Dakota were at or above 4 pCi/L, and the median reported pre-mitigation result was 5.8 pCi/L. Of 23 South Dakota counties with 30 or more tests for the same period, 8 reported a higher share; pooled, the state comes to 58.5%.

Which counties border Hutchinson County?

Hutchinson County borders 8 counties: Hanson County, Douglas County, Bon Homme County, Turner County, McCook County, Yankton County, Davison County and Charles Mix County.

Products

Hutchinson County, Products

Testing a home in Hutchinson County

In Hutchinson County, 66.7% of 39 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 58.5% pooled across South Dakota. In Zone 1 the year-round level in Hutchinson 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

Hutchinson County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Hutchinson County

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Hutchinson County, Bordering counties

Counties bordering Hutchinson County

Calculated by Radon411

Hutchinson County, Cities and towns

Cities and towns in Hutchinson County

Hutchinson County's population has barely moved since 2020: 7,413 residents on July 1, 2025 against 7,424 then, by the Census Bureau's estimates. Spread over its land, that is 9.1 people to the square mile. Its largest town, Parkston, has 1,540 residents, 20.8% of the total. Together its 6 incorporated places hold 57.3% of those residents; the other 42.7% live outside any of them. CDC's 39 reported tests for 2008 to 2017 work out to 5.3 per 1,000 residents (2025 estimate), close to South Dakota's 6.7.

From Parkston to Olivet, CDC publishes no figure by town: each reads Hutchinson County's.

The cities and towns in Hutchinson County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Parkston1,540−1.0%20.8%
Freeman1,305−1.9%17.6%
Menno622+0.6%8.4%
Tripp563−1.2%7.6%
Dimock159+8.2%2.1%
Olivet62−3.1%0.8%

6 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).

Hutchinson County, Homes

Homes in Hutchinson County

Hutchinson County is a place of houses on their own lots: 87% of its 3,227 homes are detached single-family houses, against 67% across South Dakota. The homes are older than South Dakota's as a whole: half were built before 1959 (1979 for South Dakota), and 51% date from before 1960. Owners live in 78% of the occupied homes (South Dakota: 69%), so for most households a test and a fix are their own to order.

Homes in Hutchinson County, South Dakota, 2019 to 2023
HomesHutchinson CountySouth Dakota
Housing units3,227402,364
Detached houses87%67%
In buildings of 5 or more8%16%
Mobile homes2%8%
Built before 196051%29%
Built since 20009%28%
Middle year built19591979
Owner-occupied78%69%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.