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 Renville County, North Dakota
EPA puts Renville County in Zone 1, its highest radon zone, and only 11 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
64.0%
Bottineau County
- Bottineau
- 64.0%
- Ward
- 43.0%
2 of 4 neighbours have 30+ tests, 2008 to 2017
Nearest county
43.0%
Ward County, 35 miles
- Ward
- 43.0%
- ND
- 59.3%
Share at 4+ pCi/L, 446 tests, 2008 to 2017
Ground above low
100.0%
Level with ND
- Renville
- 100.0%
- ND
- 100.0%
Share of land USGS rates moderate or high potential
Tests reported
11
Too few for a share
- Renville
- 11
- Needed
- 30
2008 to 2017, 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 Renville 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
Renville County, At a glance
Renville County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Renville 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 Renville County, 2008 to 2017, laboratory
CDC holds 11 reported tests for Renville County over the 2008 to 2017 laboratory totals, with a median of 6.4 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Renville County beside the counties around it is how this page reads it.
What these figures count
Only 11 tests were reported to CDC for Renville 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).
Renville County, Compared
Renville County radon figures, compared
Calculated by Radon411CDC's largest figure for Renville County rests on 11 tests over the 2008 to 2017 laboratory totals, 8 of them at or above 4 pCi/L, so each test moves its share by 9.1 points and no rank or comparison is drawn from it. Results reached as high as 16.2 pCi/L, with a middle value of 6.4 pCi/L.
Of the counties bordering it, 2 have a figure over the 2008 to 2017 laboratory totals: Bottineau County reported the largest share at or above 4 pCi/L, 64.0%, and Ward County the smallest, 43.0%. Farther out, Mountrail County (48 miles away) at 66.7%, McLean County (78 miles away) at 63.2% and Pierce County (84 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 Renville 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.
Renville County, Geology
The ground under Renville County
PredictedUSGS's geologic map puts all of Renville County's mapped land in one class: high radon potential. 96.8% 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 | 96.8% |
| Glacial Lakes | Silt and clay deposits derived from Cretaceous shales containing higher than average amounts of uranium. | High | 14 | 3.2% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Renville County beside the ground around it
On high-potential ground Renville County is close to North Dakota as a whole: 100% of its land against 98.9%. Of the 4 counties that border it, none has as large a share of high-potential ground; Burke County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Renville County, Local resources
Radon testing and mitigation in Renville 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
Renville County, Questions
Questions about radon in Renville County
Are radon levels high in Renville County?
Over the 2008 to 2017 laboratory totals, 72.7% of the radon tests reported to CDC for Renville County, North Dakota were at or above 4 pCi/L, and the median reported pre-mitigation result was 6.4 pCi/L. Of the counties bordering it, 2 have a figure over the 2008 to 2017 laboratory totals: Bottineau County reported the largest share at or above 4 pCi/L, 64.0%, and Ward County the smallest, 43.0%.
Which counties border Renville County?
Renville County borders 4 counties: Burke County, Ward County, Bottineau County and McHenry County.
Products
Renville County, Products
Testing a home in Renville County
No CDC figure names Renville County; the nearest county with one, Ward County (35 miles away), reported 43.0% 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 Renville 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
MonitorAranet
Radon Plus battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Approved
- Battery
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 10 minutes
Short-term kit
RA100 short-term liquid scintillation radon test kit
- Lab fee extra
Method: Liquid scintillation
In home: 48 to 96 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Renville County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Renville County
Explore
Renville County, Bordering counties
Counties bordering Renville County
Calculated by Radon411- Radon levels in McHenry CountyEPA zone 1
64.3%at or above 4 pCi/L
Median 5.3 pCi/L · 28 tests
- Radon levels in Bottineau CountyEPA zone 1
64.0%at or above 4 pCi/L
Median 5.7 pCi/L · 111 tests
- Radon levels in Burke CountyEPA zone 1
63.6%at or above 4 pCi/L
Median 7.8 pCi/L · 11 tests
- Radon levels in Ward CountyEPA zone 1
43.0%at or above 4 pCi/L
Median 3.3 pCi/L · 446 tests
Renville County, Cities and towns
Cities and towns in Renville County
The Census Bureau estimates 2,331 residents in Renville County for July 1, 2025, 65 more than in 2020 (+2.9%). Spread over its land, that is 2.7 people to the square mile. Its largest town, Mohall, has 706 residents, 30.3% of the total. Together its 6 incorporated places hold 59.0% of those residents; the other 41.0% live outside any of them. Reported testing is thin here: 11 tests over 2008 to 2017, or 4.7 for every 1,000 residents (2025 estimate), where North Dakota as a whole comes to 8.3.
From Mohall to Loraine, CDC publishes no figure by town: each reads Renville County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Mohall | 706 | +1.7% | 30.3% |
| Glenburn | 414 | +3.5% | 17.8% |
| Sherwood | 196 | +3.2% | 8.4% |
| Tolley | 43 | +7.5% | 1.8% |
| Grano | 9 | Level | 0.4% |
| Loraine | 8 | Level | 0.3% |
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).
Renville County, Homes
Homes in Renville County
Of Renville County's 1,312 homes, 68% are detached houses, against 57% across North Dakota; 18% are mobile homes. The homes are older than North Dakota's as a whole: half were built before 1973 (1981 for North Dakota), and 35% date from before 1960. Owners live in 81% of the occupied homes (North Dakota: 63%), so for most households a test and a fix are their own to order.
| Homes | Renville County | North Dakota |
|---|---|---|
| Housing units | 1,312 | 374,866 |
| Detached houses | 68% | 57% |
| In buildings of 5 or more | 1% | 25% |
| Mobile homes | 18% | 7% |
| Built before 1960 | 35% | 24% |
| Built since 2000 | 18% | 31% |
| Middle year built | 1973 | 1981 |
| Owner-occupied | 81% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.