Short-term kitempowerDX
Standard Radon Test short-term mail-in radon test kit
- Lab fee included
Method: Passive sampler
In home: 48 to 96 hours
Locations and reports
Radon Levels in Oglala Lakota County, South Dakota
EPA puts Oglala Lakota County in Zone 2, its middle radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
68.3%
Custer County
- Custer
- 68.3%
- Sheridan
- 38.5%
4 of 8 neighbours have 30+ tests, 2006 to 2015
Nearest county
51.8%
Pennington County, 48 miles
- Pennington
- 51.8%
- SD
- 58.8%
Share at 4+ pCi/L, 786 tests, 2006 to 2015
Ground above low
98.1%
0.9 pts below SD
- Oglala Lakota
- 98.1%
- SD
- 99.0%
Share of land USGS rates moderate or high potential
Tests reported
0
None published
A home here needs its own test
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Read a result for Oglala Lakota County
Starts at EPA's action level
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
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 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
Oglala Lakota County, At a glance
Oglala Lakota County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Oglala Lakota County is a
USGS geologic potential: Moderate across 98% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
No CDC test figures here
CDC has published no radon test figures for Oglala Lakota County. Of the counties bordering it, 4 have a figure over the 2006 to 2015 laboratory totals: Custer County reported the largest share at or above 4 pCi/L, 68.3%, and Sheridan County, NE the smallest, 38.5%, with Dawes County, NE at 56.9% and Pennington County at 51.8% between.
Oglala Lakota County, Compared
Oglala Lakota County radon figures, compared
Calculated by Radon411No CDC figure names Oglala Lakota County, in any year or ten-year total; over the 2006 to 2015 laboratory totals, the agency's counts reach 63 South Dakota counties without it. Pooled across 63 South Dakota counties, 58.8% of reported tests reached that level; across every county in the country with a figure, 36.3%.
Of the counties bordering it, 4 have a figure over the 2006 to 2015 laboratory totals: Custer County reported the largest share at or above 4 pCi/L, 68.3%, and Sheridan County, NE the smallest, 38.5%, with Dawes County, NE at 56.9% and Pennington County at 51.8% between. Farther out, Meade County (85 miles away) at 54.5%, Lawrence County (94 miles away) at 60.5% and Hughes County (147 miles away) at 66.7% have figures too. Statewide for the same period, Bon Homme County reported the highest share (79.5%) and Davison County the lowest (47.9%).
EPA's 1993 map puts Oglala Lakota County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 98% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Oglala Lakota County, Geology
The ground under Oglala Lakota County
PredictedMost of the ground under Oglala Lakota County is one class on USGS's geologic map: 98.1% of its land is moderate radon potential, with 1.9% low. The map puts 87.0% of Oglala Lakota County in the area it calls Southern Plateaus and 11.0% in Pierre Hills, with one smaller area beside them. USGS gives the first a radon index of 11 and the second 10, both in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Southern Plateaus | Late Tertiary continental sandstone. | Moderate | 11 | 87.0% |
| Pierre Hills | Pierre Shale and Fox Hills sandstone. | Moderate | 10 | 11.0% |
| Sand Hills | Tertiary sandstone, siltstone, shale. | Low | 8 | 1.9% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Oglala Lakota County beside the ground around it
Across South Dakota 56.7% of the land is rated high; none of Oglala Lakota County's is. Of the 8 counties that border it, 5 have more high-potential ground, Fall River County the most at 36.6%.
The map rates the ground, not the air in any home.
Local help
Oglala Lakota County, Local resources
Radon testing and mitigation in Oglala Lakota County
- South Dakota's radon programDepartment of Agriculture and Natural ResourcesSouth Dakota's radon program offers free or discounted test kits, and answers questions about testing and mitigation in South Dakota.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
The Department of Agriculture and Natural Resources (DANR) will provide 500 free Radon test kits to South Dakota Residents.
- Compare kits
- Professionals in South Dakota5 professionals are listed in South Dakota.
What South Dakota's program says
- Phone
- 1-800-438-3367
What it means
Oglala Lakota County, Questions
Questions about radon in Oglala Lakota County
Are radon levels high in Oglala Lakota County?
No CDC testing statistics are published here for Oglala Lakota County, South Dakota yet. Of the counties bordering it, 4 have a figure over the 2006 to 2015 laboratory totals: Custer County reported the largest share at or above 4 pCi/L, 68.3%, and Sheridan County, NE the smallest, 38.5%, with Dawes County, NE at 56.9% and Pennington County at 51.8% between.
Which counties border Oglala Lakota County?
Oglala Lakota County borders 8 counties: Bennett County, SD, Sheridan County, NE, Fall River County, SD, Dawes County, NE, Custer County, SD, Jackson County, SD, Pennington County, SD and Cherry County, NE.
Products
Oglala Lakota County, Products
Testing a home in Oglala Lakota County
No CDC figure names Oglala Lakota County; the nearest county with one, Pennington County (48 miles away), reported 51.8% of its tests at or above 4 pCi/L over the 2006 to 2015 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 Oglala Lakota 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
MonitorKidde
Radon Detector (RAB) battery digital radon detector with an alarm
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 12 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Best radon monitors for Oglala Lakota County homes, compared
Explore
Oglala Lakota County, Bordering counties
Counties bordering Oglala Lakota County
Calculated by Radon411- Radon levels in Custer County, SDEPA zone 2
68.3%at or above 4 pCi/L
Median 7.2 pCi/L · 82 tests
- Radon levels in Dawes County, NEEPA zone 2
56.9%at or above 4 pCi/L
Median 4.6 pCi/L · 543 tests
- Radon levels in Fall River County, SDEPA zone 2
54.5%at or above 4 pCi/L
Median 4.3 pCi/L · 22 tests
- Radon levels in Pennington County, SDEPA zone 2
51.8%at or above 4 pCi/L
Median 4.3 pCi/L · 786 tests
- Radon levels in Sheridan County, NEEPA zone 2
38.5%at or above 4 pCi/L
Median 2.9 pCi/L · 109 tests
- Radon levels in Bennett County, SDEPA zone 2
33.3%at or above 4 pCi/L
Median 3.0 pCi/L · 3 tests
- Radon levels in Cherry County, NEEPA zone 3
4.5%at or above 4 pCi/L
Median 1.9 pCi/L · 22 tests
- Radon levels in Jackson County, SDEPA zone 2
0.0%at or above 4 pCi/L
Median 1.1 pCi/L · 1 test
Oglala Lakota County, Cities and towns
Cities and towns in Oglala Lakota County
About 13,338 people live in Oglala Lakota County by the Census Bureau's estimate for July 1, 2025, 309 fewer than in 2020 (−2.3%). Spread over its land, that is 6.4 people to the square mile. Batesland, its one incorporated place, has 73 residents, 0.5% of the total. CDC publishes no radon test count for Oglala Lakota County; across South Dakota its counts for 2006 to 2015 come to 5.2 tests for every 1,000 residents (2025 estimate).
Batesland is the one incorporated place here; CDC publishes no figure by town, so it reads Oglala Lakota County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Batesland | 73 | −3.9% | 0.5% |
One incorporated place, 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).
Oglala Lakota County, Homes
Homes in Oglala Lakota County
Of Oglala Lakota County's 3,461 homes, 65% are detached houses, against 67% across South Dakota; 30% are mobile homes. Much of Oglala Lakota County is recent building: 23% of its homes have gone up since 2000 and the middle year built is 1987, against 1979 for South Dakota. 53% of occupied homes are lived in by their owner (South Dakota: 69%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Oglala Lakota County | South Dakota |
|---|---|---|
| Housing units | 3,461 | 402,364 |
| Detached houses | 65% | 67% |
| In buildings of 5 or more | 2% | 16% |
| Mobile homes | 30% | 8% |
| Built before 1960 | 10% | 29% |
| Built since 2000 | 23% | 28% |
| Middle year built | 1987 | 1979 |
| Owner-occupied | 53% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.