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Radon Levels in Keya Paha County, Nebraska

EPA puts Keya Paha County in Zone 2, its middle radon zone, and only 9 radon tests from it are on file with CDC (2020). Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

  • Highest bordering

    59.6%

    Boyd County

    Boyd
    59.6%
    Cherry
    13.3%

    4 of 8 neighbours have 30+ tests, 2008 to 2017

  • Nearest county

    41.9%

    Brown County, 33 miles

    Brown
    41.9%
    Nebraska
    58.5%

    Share at 4+ pCi/L, 62 tests, 2008 to 2017

  • Ground above low

    100.0%

    28.2 pts above Nebraska

    Keya Paha
    100.0%
    Nebraska
    71.8%

    Share of land USGS rates moderate or high potential

  • Tests reported

    18

    Too few for a share

    Keya Paha
    18
    Needed
    30

    2019

  • EPA radon zone

    Zone 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    EPA predicts 2 to 4 pCi/L indoors

Read a result for Keya Paha County

Starts at EPA's action level

4.0pCi/L

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

EPA’s reading of 4.0 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.

The data

Keya Paha County, At a glance

Keya Paha County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Keya Paha County is a county: EPA's forecast for it as a whole is an average indoor of 2 to 4 pCi/L (75 to 150 Bq/m³). It describes no single address, and homes above EPA's are found in every zone, this one included.

USGS geologic potential: Moderate across 92% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Keya Paha County, 2020

Share of reported tests at or above 4 pCi/L, by year, Keya Paha County
Share of reported tests at or above 4 pCi/L, by year, Keya Paha County
YearShare of reported tests at or above 4 pCi/L
201420.0%
20150.0%
2016100.0%
20170.0%
201933.3%
202066.7%

2020: 66.7%. Across these years the share ran from 0.0% to 100.0%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

Only 9 tests were reported to CDC for Keya Paha County over 2020, and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor this house.

Measured: CDC tracking data. Figure above: 2020. Measured data period: 2005 to 2020 (every CDC figure on file).

How to read these figures

Keya Paha County, Compared

Keya Paha County radon figures, compared

Calculated by Radon411

CDC's largest figure for Keya Paha County rests on 18 tests in 2019, 6 of them at or above 4 pCi/L, so each test moves its share by 5.6 points and no rank or comparison is drawn from it. Results reached as high as 6.2 pCi/L, with a middle value of 1.8 pCi/L.

Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Boyd County reported the largest share at or above 4 pCi/L, 59.6%, and Cherry County the smallest, 13.3%, with Holt County at 42.7% and Brown County at 41.9% between. Farther out, Knox County (94 miles away) at 68.8%, Antelope County (97 miles away) at 71.3% and Valley County (98 miles away) at 52.4% have figures too. Pooled across 93 Nebraska counties, 58.5% of reported tests reached that level; across every county in the country with a figure, 35.7%.

Statewide for the same period, Clay County reported the highest share (85.1%) and Cherry County the lowest (13.3%). EPA's 1993 map puts Keya Paha County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 92% of the county's land moderate radon potential.

Nebraska, the United States and the counties around Keya Paha County, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedian
Nebraska, pooled93 counties, pooled42,78258.5%Not pooled
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled
Clay Countyhighest in the state19485.1%8.6 pCi/L
Merrick Countylowest in the state17126.3%2.3 pCi/L
Todd County, SDborders it1100.0%4.7 pCi/L
Gregory County, SDborders it1566.7%5.3 pCi/L
Boyd County, NEborders it4759.6%4.6 pCi/L
Tripp County, SDborders it955.6%4.2 pCi/L
Holt County, NEborders it34942.7%3.3 pCi/L
Brown County, NEborders it6241.9%3.7 pCi/L
Cherry County, NEborders it3013.3%1.7 pCi/L
Rock County, NEborders it244.2%1.2 pCi/L
The nearest Nebraska counties to Keya Paha County with 30 or more tests, 2008 to 2017, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Brown County33 mi6241.9%3.7 pCi/L
Boyd County48 mi4759.6%4.6 pCi/L
Holt County56 mi34942.7%3.3 pCi/L
Cherry County75 mi3013.3%1.7 pCi/L
Knox County94 mi40168.8%6.2 pCi/L
Antelope County97 mi25871.3%6.5 pCi/L
Valley County98 mi8452.4%4.2 pCi/L
Custer County102 mi13252.3%4.2 pCi/L
Keya Paha County radon tests by year, against Nebraska's pooled share
YearTestsAt or above 4 pCi/LMedianHighestNebraska, pooledChange from the row before
2020966.7%6.9 pCi/L8.0 pCi/L42.2%+33.4 points
20191833.3%1.8 pCi/L6.2 pCi/L44.3%+33.3 points
201730.0%2.4 pCi/L2.4 pCi/L47.7%−100.0 points
20163100.0%4.9 pCi/L4.9 pCi/L47.4%+100.0 points
201560.0%2.9 pCi/L3.8 pCi/L53.3%−20.0 points
20141520.0%3.6 pCi/L4.8 pCi/L50.5%First on file

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

Keya Paha County, Geology

The ground under Keya Paha County

Predicted

Most of the ground under Keya Paha County is one class on USGS's geologic map: 92.2% of its land is moderate radon potential, with 7.8% high. The map puts 92.0% of Keya Paha County in the area it calls Pierre Shale and 7.8% in Sharon Springs. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 12, in the high band (12 to 17).

USGS's geologic areas under Keya Paha County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Pierre ShaleCretaceous marine shaleModerate1192.0%
Sharon SpringsCretaceous Pierre Shale bedrock, including the uranium-bearing Sharon Springs Member.High127.8%

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

Keya Paha County beside the ground around it

Nebraska as a whole has more high-potential ground than Keya Paha County: 40.9% of its land, against 7.8% here. Of the 8 counties that border it, 1 has more high-potential ground, Boyd County the most at 95.1%.

Share of land by USGS radon potential: Keya Paha County, the 8 counties bordering it and Nebraska
AreaEPA zoneLow potentialModerate potentialHigh potential
Keya Paha CountyZone 2None92.2%7.8%
Tripp County, SDZone 2None94.0%6.0%
Brown CountyZone 376.7%23.3%None
Rock CountyZone 377.4%22.6%None
Gregory County, SDZone 2None92.9%7.1%
Holt CountyZone 355.1%39.7%5.2%
Todd County, SDZone 232.8%67.2%None
Boyd CountyZone 1None4.9%95.1%
Cherry CountyZone 398.5%1.5%None
Nebraska93 counties, pooled by land areaVaries28.2%30.9%40.9%

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

What it means

Keya Paha County, Questions

Questions about radon in Keya Paha County

Are radon levels high in Keya Paha County?

In 2020, 66.7% of the radon tests reported to CDC for Keya Paha County, Nebraska were at or above 4 pCi/L, and the median reported pre-mitigation result was 6.9 pCi/L. Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Boyd County reported the largest share at or above 4 pCi/L, 59.6%, and Cherry County the smallest, 13.3%, with Holt County at 42.7% and Brown County at 41.9% between.

Which counties border Keya Paha County?

Keya Paha County borders 8 counties: Tripp County, SD, Brown County, NE, Rock County, NE, Gregory County, SD, Holt County, NE, Todd County, SD, Boyd County, NE and Cherry County, NE.

Products

Keya Paha County, Products

Testing a home in Keya Paha County

No CDC figure names Keya Paha County; the nearest county with one, Brown County (33 miles away), reported 41.9% of its tests at or above 4 pCi/L over the 2008 to 2017 laboratory totals, the only reading nearby until a test of this home. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Keya Paha County; a long-term test tells the year-round average.

Test kits and monitors3

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Best radon monitors for Keya Paha County homes, compared

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Keya Paha County, Bordering counties

Counties bordering Keya Paha County

Calculated by Radon411

Keya Paha County, Cities and towns

Cities and towns in Keya Paha County

The Census Bureau estimates 792 residents in Keya Paha County for July 1, 2025, 32 more than in 2020 (+4.2%). Spread over its land, that is 1.0 people to the square mile. Its largest town, Springview, has 241 residents, 30.4% of the total. Together its 2 incorporated places hold 31.8% of those residents; the other 68.2% live outside any of them. CDC's 18 reported tests for 2019 work out to 22.7 per 1,000 residents (2025 estimate), close to Nebraska's 25.7.

From Springview to Burton, CDC publishes no figure by town: each reads Keya Paha County's.

The cities and towns in Keya Paha County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Springview241+3.9%30.4%
Burton11Level1.4%

2 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).

Keya Paha County, Homes

Homes in Keya Paha County

Keya Paha County is a place of houses on their own lots: 90% of its 495 homes are detached single-family houses, against 72% across Nebraska. The homes are older than Nebraska's as a whole: half were built before 1967 (1975 for Nebraska), and 44% date from before 1960. Owners live in 80% of the occupied homes (Nebraska: 67%), so for most households a test and a fix are their own to order.

Homes in Keya Paha County, Nebraska, 2019 to 2023
HomesKeya Paha CountyNebraska
Housing units495855,631
Detached houses90%72%
In buildings of 5 or more0%17%
Mobile homes6%3%
Built before 196044%32%
Built since 200025%22%
Middle year built19671975
Owner-occupied80%67%

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