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
Locations and reports
Radon Levels in Kidder County, North Dakota
EPA puts Kidder County in Zone 1, its highest radon zone, and only 29 radon tests from it are on file with CDC (2008 to 2017, laboratory totals). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
76.9%
22.9 pts above ND
- Kidder
- 76.9%
- ND
- 54.0%
39 tests, 2005 to 2014
Median result
6.2pCi/L
Action level reached
- Kidder
- 6.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2005 to 2014
Tests reported
39
30th of 39 by tests
- Kidder
- 39
- Burleigh
- 1,312
Reported to CDC before any fix, 2005 to 2014
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Rank in ND
3 of 39
Top quarter
- Kidder
- 76.9%
- Billings
- 90.9%
By share, of 39 with 30+ tests
Read a result for Kidder County
Starts at Kidder County's median, 6.2 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 6.2 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. Kidder County's median reported result, 2005 to 2014.
The data
Kidder County, At a glance
Kidder County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Kidder County in
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 Kidder County, 2008 to 2017, laboratory
CDC holds 29 reported tests for Kidder County over the 2008 to 2017 laboratory totals, with a median of 7.3 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Kidder County beside the counties around it is how this page reads it.
What these figures count
Only 29 tests were reported to CDC for Kidder County over 2008 to 2017 (laboratory totals), 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: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Kidder County, Compared
Kidder County radon figures, compared
Calculated by Radon411More than half: 76.9% of the 39 radon tests reported to CDC for Kidder County over the 2005 to 2014 laboratory totals read at least 4 pCi/L. That places it 3rd of 39 North Dakota counties with 30 or more tests for the same period. That is 22.9 points above the 54.0% pooled from 53 North Dakota counties.
The newest figure, over the 2008 to 2017 laboratory totals, counts only 29 tests (79.3% at or above 4 pCi/L), too few to compare, so this reading uses the 39-test figure.
The median result, 6.2 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 17.9 pCi/L. The rest split 10.3% under 2 pCi/L and 12.8% from 2 to 4 (North Dakota: 22.0% and 23.9%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 76.9% share point the same way here.
No bordering county with a figure for the same period reported a higher share; the closest is Stutsman County at 69.7%, the lowest Wells County at 38.2%. Statewide for the same period, Billings County reported the highest share (90.9%) and Williams County the lowest (35.1%).
CDC's ten-year totals for Kidder County went from 39 tests (2005 to 2014) to 29 (2008 to 2017), the share going from 76.9% to 79.3%.
Nationally, every county with a figure for the same period pools to 36.0%; Kidder County sits 40.9 points above it.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Kidder County, Geology
The ground under Kidder County
PredictedUSGS's geologic map puts all of Kidder County's mapped land in one class: high radon potential. All of it lies in the area the map calls Great Plains (Glaciated), to which USGS gives a radon index of 13, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Great Plains (Glaciated) | Glacial deposits derived from Cretaceous shales containing higher than average amounts of uranium. | High | 13 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Kidder County beside the ground around it
On high-potential ground Kidder County is close to North Dakota as a whole: 100% of its land against 98.9%. Of the 6 counties that border it, none has as large a share of high-potential ground; Burleigh County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Kidder County, Local resources
Radon testing and mitigation in Kidder County
- North Dakota's radon programNorth Dakota Department of Environmental QualityNorth Dakota's radon program offers free or discounted test kits, and answers questions about testing and mitigation in North Dakota.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Notice: The DEQ is out of free radon test kits.
- Compare kits
- Professionals in North Dakota47 professionals are listed in North Dakota.
What North Dakota's program says
- Phone
- 701-328-5166
- jOtto@nd.gov
What it means
Kidder County, Questions
Questions about radon in Kidder County
Are radon levels high in Kidder County?
Over the 2008 to 2017 laboratory totals, 79.3% of the radon tests reported to CDC for Kidder County, North Dakota were at or above 4 pCi/L, and the median reported pre-mitigation result was 7.3 pCi/L. Of 39 North Dakota counties with 30 or more tests for the same period, 2 reported a higher share; pooled, the state comes to 54.0%.
Which counties border Kidder County?
Kidder County borders 6 counties: Logan County, Burleigh County, Stutsman County, Emmons County, Wells County and Sheridan County.
Products
Kidder County, Products
Testing a home in Kidder County
In Kidder County, 76.9% of 39 tests reported to CDC over the 2005 to 2014 laboratory totals reached 4 pCi/L, against 54.0% pooled across North Dakota. In Zone 1 the year-round level in Kidder 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
Monitor
View Radon Wi-Fi radon monitor with an e-paper display
- C-NRPP 2024/25: Approved
- Battery
- Wi-Fi, Bluetooth
- Screen, app
Method: Alpha spectrometry
Readings: Every 60 minutes
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
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Kidder County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Kidder County
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Kidder County, Bordering counties
Counties bordering Kidder County
Calculated by Radon411- Radon levels in Stutsman CountyEPA zone 1
69.7%at or above 4 pCi/L
Median 5.8 pCi/L · 234 tests · 7.2 points below Kidder County
- Radon levels in Emmons CountyEPA zone 1
64.9%at or above 4 pCi/L
Median 5.5 pCi/L · 57 tests · 12.0 points below Kidder County
- Radon levels in Sheridan CountyEPA zone 1
60.0%at or above 4 pCi/L
Median 4.7 pCi/L · 15 tests · 16.9 points below Kidder County
- Radon levels in Logan CountyEPA zone 1
56.3%at or above 4 pCi/L
Median 4.6 pCi/L · 16 tests · 20.6 points below Kidder County
- Radon levels in Burleigh CountyEPA zone 1
47.6%at or above 4 pCi/L
Median 3.8 pCi/L · 1,312 tests · 29.3 points below Kidder County
- Radon levels in Wells CountyEPA zone 1
38.2%at or above 4 pCi/L
Median 3.3 pCi/L · 110 tests · 38.7 points below Kidder County
Kidder County, Cities and towns
Cities and towns in Kidder County
The Census Bureau estimates 2,393 residents in Kidder County for July 1, 2025, 12 more than in 2020 (+0.5%). Spread over its land, that is 1.8 people to the square mile. Its largest town, Steele, has 664 residents, 27.7% of the total. Together its 6 incorporated places hold 46.3% of those residents; the other 53.7% live outside any of them. Testing is reported here more often than across the state: CDC's 39 reported tests for 2005 to 2014 come to 16.3 for every 1,000 residents (2025 estimate), against 8.2 for North Dakota.
From Steele to Robinson, CDC publishes no figure by town: each reads Kidder County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Steele | 664 | +0.2% | 27.7% |
| Tappen | 216 | +0.9% | 9.0% |
| Dawson | 76 | +2.7% | 3.2% |
| Pettibone | 59 | Level | 2.5% |
| Tuttle | 58 | −1.7% | 2.4% |
| Robinson | 36 | Level | 1.5% |
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).
Kidder County, Homes
Homes in Kidder County
Kidder County is a place of houses on their own lots: 76% of its 1,651 homes are detached single-family houses, against 57% across North Dakota. The homes are older than North Dakota's as a whole: half were built before 1969 (1981 for North Dakota), and 34% date from before 1960. Owners live in 76% of the occupied homes (North Dakota: 63%), so for most households a test and a fix are their own to order.
| Homes | Kidder County | North Dakota |
|---|---|---|
| Housing units | 1,651 | 374,866 |
| Detached houses | 76% | 57% |
| In buildings of 5 or more | 2% | 25% |
| Mobile homes | 18% | 7% |
| Built before 1960 | 34% | 24% |
| Built since 2000 | 14% | 31% |
| Middle year built | 1969 | 1981 |
| Owner-occupied | 76% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.