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 Logan County, North Dakota
EPA puts Logan County in Zone 1, its highest radon zone, and only 12 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
Highest bordering
73.5%
Stutsman County
- Stutsman
- 73.5%
- LaMoure
- 70.5%
3 of 5 neighbours have 30+ tests, 2008 to 2017
Nearest county
71.9%
McIntosh County, 24 miles
- McIntosh
- 71.9%
- ND
- 59.3%
Share at 4+ pCi/L, 32 tests, 2008 to 2017
Ground above low
100.0%
Level with ND
- Logan
- 100.0%
- ND
- 100.0%
Share of land USGS rates moderate or high potential
Tests reported
16
Too few for a share
- Logan
- 16
- Needed
- 30
2005 to 2014, laboratory
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Read a result for Logan 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
Logan County, At a glance
Logan County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Logan 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 Logan County, 2008 to 2017, laboratory
CDC holds 12 reported tests for Logan County over the 2008 to 2017 laboratory totals, with a median of 3.7 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Logan County beside the counties around it is how this page reads it.
What these figures count
Only 12 tests were reported to CDC for Logan 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).
Logan County, Compared
Logan County radon figures, compared
Calculated by Radon411CDC's largest figure for Logan County rests on 16 tests over the 2005 to 2014 laboratory totals, 9 of them at or above 4 pCi/L, so each test moves its share by 6.3 points and no rank or comparison is drawn from it. Results reached as high as 9.7 pCi/L, with a middle value of 4.6 pCi/L.
Of the counties bordering it, 3 have a figure over the 2008 to 2017 laboratory totals: Stutsman County reported the largest share at or above 4 pCi/L, 73.5%, and LaMoure County the smallest, 70.5%, with McIntosh County at 71.9% between. Farther out, Dickey County (52 miles away) at 67.1%, Burleigh County (59 miles away) at 51.1% and Barnes County (75 miles away) at 67.5% have figures too. Pooled across 53 North Dakota counties, 59.3% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Pembina County reported the highest share (82.5%) and Williams County the lowest (33.8%). EPA's 1993 map puts Logan County in Zone 1, the map's highest label: a predicted county average above 4 pCi/L. USGS geology rates 100% of the county's land high radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Logan County, Geology
The ground under Logan County
PredictedUSGS's geologic map puts all of Logan 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.
Logan County beside the ground around it
On high-potential ground Logan County is close to North Dakota as a whole: 100% of its land against 98.9%. Of the 5 counties that border it, none has as large a share of high-potential ground; Emmons County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Logan County, Local resources
Radon testing and mitigation in Logan 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
Logan County, Questions
Questions about radon in Logan County
Are radon levels high in Logan County?
Over the 2008 to 2017 laboratory totals, 50.0% of the radon tests reported to CDC for Logan County, North Dakota were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.7 pCi/L. Of the counties bordering it, 3 have a figure over the 2008 to 2017 laboratory totals: Stutsman County reported the largest share at or above 4 pCi/L, 73.5%, and LaMoure County the smallest, 70.5%, with McIntosh County at 71.9% between.
Which counties border Logan County?
Logan County borders 5 counties: McIntosh County, Kidder County, Stutsman County, Emmons County and LaMoure County.
Products
Logan County, Products
Testing a home in Logan County
No CDC figure names Logan County; the nearest county with one, McIntosh County (24 miles away), reported 71.9% 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 1 the year-round level in Logan 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
RadonEye RD200 plug-in continuous radon monitor
- C-NRPP 2024/25: Approved
- Plug-in
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 10 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
Logan County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Logan County
Explore
Logan County, Bordering counties
Counties bordering Logan County
Calculated by Radon411- Radon levels in Emmons CountyEPA zone 1
86.2%at or above 4 pCi/L
Median 7.1 pCi/L · 29 tests
- Radon levels in Kidder CountyEPA zone 1
79.3%at or above 4 pCi/L
Median 7.3 pCi/L · 29 tests
- Radon levels in Stutsman CountyEPA zone 1
73.5%at or above 4 pCi/L
Median 5.8 pCi/L · 351 tests
- Radon levels in McIntosh CountyEPA zone 1
71.9%at or above 4 pCi/L
Median 7.0 pCi/L · 32 tests
- Radon levels in LaMoure CountyEPA zone 1
70.5%at or above 4 pCi/L
Median 5.2 pCi/L · 44 tests
Logan County, Cities and towns
Cities and towns in Logan County
About 1,859 people live in Logan County by the Census Bureau's estimate for July 1, 2025, 24 fewer than in 2020 (−1.3%). Spread over its land, that is 1.9 people to the square mile. Its largest town, Napoleon, has 738 residents, 39.7% of the total. CDC's 16 reported tests for 2005 to 2014 work out to 8.6 per 1,000 residents (2025 estimate), close to North Dakota's 8.2.
From Napoleon to Fredonia, CDC publishes no figure by town: each reads Logan County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Napoleon | 738 | −2.0% | 39.7% |
| Gackle | 280 | −0.4% | 15.1% |
| Lehrextends beyond Logan County | 80 | −2.4% | Counted whole |
| Fredonia | 39 | Level | 2.1% |
4 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 Logan County is counted whole, so it has no share.
Logan County, Homes
Homes in Logan County
Logan County is a place of houses on their own lots: 90% of its 1,068 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 1965 (1981 for North Dakota), and 43% date from before 1960. Owners live in 83% of the occupied homes (North Dakota: 63%), so for most households a test and a fix are their own to order.
| Homes | Logan County | North Dakota |
|---|---|---|
| Housing units | 1,068 | 374,866 |
| Detached houses | 90% | 57% |
| In buildings of 5 or more | 3% | 25% |
| Mobile homes | 5% | 7% |
| Built before 1960 | 43% | 24% |
| Built since 2000 | 12% | 31% |
| Middle year built | 1965 | 1981 |
| Owner-occupied | 83% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.