Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
Locations and reports
Radon Levels in Eddy County, North Dakota
EPA puts Eddy County in Zone 1, its highest radon zone, and only 8 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
77.4%
Benson County
- Benson
- 77.4%
- Wells
- 48.1%
3 of 5 neighbours have 30+ tests, 2008 to 2017
Nearest county
61.3%
Foster County, 18 miles
- Foster
- 61.3%
- ND
- 59.3%
Share at 4+ pCi/L, 31 tests, 2008 to 2017
Ground above low
100.0%
Level with ND
- Eddy
- 100.0%
- ND
- 100.0%
Share of land USGS rates moderate or high potential
Tests reported
17
Too few for a share
- Eddy
- 17
- 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 Eddy 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
Eddy County, At a glance
Eddy County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Eddy 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 Eddy County, 2008 to 2017, laboratory
CDC holds 8 reported tests for Eddy County over the 2008 to 2017 laboratory totals, with a median of 0.9 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Eddy County beside the counties around it is how this page reads it.
What these figures count
Only 8 tests were reported to CDC for Eddy 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).
Eddy County, Compared
Eddy County radon figures, compared
Calculated by Radon411CDC's largest figure for Eddy County rests on 17 tests over the 2005 to 2014 laboratory totals, 5 of them at or above 4 pCi/L, so each test moves its share by 5.9 points and no rank or comparison is drawn from it. Results reached as high as 20.7 pCi/L, with a middle value of 3.1 pCi/L.
Of the counties bordering it, 3 have a figure over the 2008 to 2017 laboratory totals: Benson County reported the largest share at or above 4 pCi/L, 77.4%, and Wells County the smallest, 48.1%, with Foster County at 61.3% between. Farther out, Ramsey County (39 miles away) at 76.9%, Stutsman County (51 miles away) at 73.5% and Pierce County (62 miles away) at 48.7% 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 Eddy 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.
Eddy County, Geology
The ground under Eddy County
PredictedUSGS's geologic map puts all of Eddy 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.
Eddy County beside the ground around it
On high-potential ground Eddy 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; Foster County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Eddy County, Local resources
Radon testing and mitigation in Eddy 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
Eddy County, Questions
Questions about radon in Eddy County
Are radon levels high in Eddy County?
Over the 2008 to 2017 laboratory totals, 12.5% of the radon tests reported to CDC for Eddy County, North Dakota were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.9 pCi/L. Of the counties bordering it, 3 have a figure over the 2008 to 2017 laboratory totals: Benson County reported the largest share at or above 4 pCi/L, 77.4%, and Wells County the smallest, 48.1%, with Foster County at 61.3% between.
Which counties border Eddy County?
Eddy County borders 5 counties: Foster County, Nelson County, Benson County, Griggs County and Wells County.
Products
Eddy County, Products
Testing a home in Eddy County
No CDC figure names Eddy County; the nearest county with one, Foster County (18 miles away), reported 61.3% 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 Eddy 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
MonitorAEGTEST
HOUND-3699 radon monitor with a 2.1-inch touchscreen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
First reading: Within 1 hour
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
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Eddy County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Eddy County
Explore
Eddy County, Bordering counties
Counties bordering Eddy County
Calculated by Radon411- Radon levels in Benson CountyEPA zone 1
77.4%at or above 4 pCi/L
Median 6.2 pCi/L · 31 tests
- Radon levels in Nelson CountyEPA zone 1
63.2%at or above 4 pCi/L
Median 5.7 pCi/L · 19 tests
- Radon levels in Foster CountyEPA zone 1
61.3%at or above 4 pCi/L
Median 4.5 pCi/L · 31 tests
- Radon levels in Griggs CountyEPA zone 1
54.5%at or above 4 pCi/L
Median 5.0 pCi/L · 11 tests
- Radon levels in Wells CountyEPA zone 1
48.1%at or above 4 pCi/L
Median 3.8 pCi/L · 81 tests
Eddy County, Cities and towns
Cities and towns in Eddy County
Eddy County's population has barely moved since 2020: 2,329 residents on July 1, 2025 against 2,326 then, by the Census Bureau's estimates. Spread over its land, that is 3.7 people to the square mile. New Rockford alone is home to 1,342 of them, 57.6% of the total. Together its 2 incorporated places hold 65.5% of those residents; the other 34.5% live outside any of them. CDC's 17 reported tests for 2005 to 2014 work out to 7.3 per 1,000 residents (2025 estimate), close to North Dakota's 8.2.
From New Rockford to Sheyenne, CDC publishes no figure by town: each reads Eddy County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| New Rockford | 1,342 | −0.2% | 57.6% |
| Sheyenne | 184 | +1.1% | 7.9% |
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).
Eddy County, Homes
Homes in Eddy County
Eddy County is a place of houses on their own lots: 76% of its 1,338 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 1967 (1981 for North Dakota), and 42% date from before 1960. 72% of occupied homes are lived in by their owner (North Dakota: 63%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Eddy County | North Dakota |
|---|---|---|
| Housing units | 1,338 | 374,866 |
| Detached houses | 76% | 57% |
| In buildings of 5 or more | 13% | 25% |
| Mobile homes | 5% | 7% |
| Built before 1960 | 42% | 24% |
| Built since 2000 | 12% | 31% |
| Middle year built | 1967 | 1981 |
| Owner-occupied | 72% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.