Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
Locations and reports
Radon Levels in Morrow County, Oregon
EPA puts Morrow County in Zone 2, its middle radon zone, and only 3 radon tests from it are on file with CDC (2022). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
24.3%
Benton County
- Benton
- 24.3%
1 of 6 neighbours have 30+ tests, 2016
Nearest county
39.1%
Union County, 77 miles
- Union
- 39.1%
- Oregon
- 21.5%
Share at 4+ pCi/L, 64 tests, 2016
Ground above low
100.0%
37.7 pts above Oregon
- Morrow
- 100.0%
- Oregon
- 62.3%
Share of land USGS rates moderate or high potential
Tests reported
6
Too few for a share
- Morrow
- 6
- Needed
- 30
2019
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 Morrow 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
Morrow County, At a glance
Morrow County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Morrow County is a
USGS geologic potential: Moderate across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Morrow County, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2015 | 0.0% |
| 2016 | 0.0% |
| 2019 | 0.0% |
| 2022 | 0.0% |
2022: 0.0%. Across these years the share ran from 0.0% to 0.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 3 tests were reported to CDC for Morrow County over 2022, 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: 2022. Measured data period: 2005 to 2022 (every CDC figure on file).
Morrow County, Compared
Morrow County radon figures, compared
Calculated by Radon411CDC's largest figure for Morrow County rests on 6 tests in 2019, 0 of them at or above 4 pCi/L, so each test moves its share by 16.7 points and no rank or comparison is drawn from it. Results reached as high as 3.9 pCi/L, with a middle value of 1.6 pCi/L.
Benton County, WA, the one bordering county with a figure in 2016, reported 24.3% of its tests at or above 4 pCi/L. Farther out, Union County (77 miles away) at 39.1%, Wasco County (79 miles away) at 10.0% and Hood River County (101 miles away) at 20.8% have figures too. Pooled across 35 Oregon counties, 21.5% of reported tests reached that level; across every county in the country with a figure, 31.2%.
Statewide for the same period, Union County reported the highest share (39.1%) and Deschutes County the lowest (6.7%). EPA's 1993 map puts Morrow County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Morrow County, Geology
The ground under Morrow County
PredictedUSGS's geologic map puts all of Morrow County's mapped land in one class: moderate radon potential. The map puts 83.9% of Morrow County in the area it calls Deschutes Umatilla Plateau and 16.0% in Blue Mountains. USGS gives both a radon index of 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Deschutes Umatilla Plateau | Tertiary basalt, basaltic breccia, tuffaceous sedimentary rocks and tuff. Elevated uranium in soils. | Moderate | 9 | 83.9% |
| Blue Mountains | Tertiary basalt and andesite, tuffaceous sedimentary rocks, and tuff. | Moderate | 9 | 16.0% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Morrow County beside the ground around it
Morrow County has more moderate-potential ground than Oregon as a whole: 100% of its land against 62.3%. Of the 6 counties that border it, none has as large a share of moderate-potential ground; Benton County, WA comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Morrow County, Local resources
Radon testing and mitigation in Morrow County
- Oregon Radon Awareness ProgramOregon Radon Awareness Program, run by Oregon Health Authority, offers free or discounted test kits, and answers questions about testing and mitigation in Oregon.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Oregon Radon Awareness Program provides a FREE short-term radon test kit to those living in areas of Oregon where little radon testing has been done.
- Compare kits
- Professionals in Oregon38 professionals are listed in Oregon.
What Oregon's program says
- Radon.program@dhsoha.state.or.us
What it means
Morrow County, Questions
Questions about radon in Morrow County
Are radon levels high in Morrow County?
In 2022, 0.0% of the radon tests reported to CDC for Morrow County, Oregon were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.1 pCi/L. Benton County, WA, the one bordering county with a figure in 2016, reported 24.3% of its tests at or above 4 pCi/L.
Which counties border Morrow County?
Morrow County borders 6 counties: Gilliam County, OR, Umatilla County, OR, Wheeler County, OR, Benton County, WA, Klickitat County, WA and Grant County, OR.
Products
Morrow County, Products
Testing a home in Morrow County
No CDC figure names Morrow County; the nearest county with one, Union County (77 miles away), reported 39.1% of its tests at or above 4 pCi/L in 2016, 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 Morrow County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
Monitor
View Plus radon and air quality monitor
- C-NRPP 2024/25: Approved
- Battery
- Wi-Fi, Bluetooth
- Screen, app
Method: Alpha spectrometry
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Morrow County, Bordering counties
Counties bordering Morrow County
Calculated by Radon411- Radon levels in Benton County, WAEPA zone 2
24.3%at or above 4 pCi/L
Median 1.8 pCi/L · 111 tests
- Radon levels in Umatilla County, OREPA zone 2
20.0%at or above 4 pCi/L
Median 1.8 pCi/L · 10 tests
- Radon levels in Klickitat County, WAEPA zone 2
14.8%at or above 4 pCi/L
Median 2.1 pCi/L · 27 tests
- Radon levels in Gilliam County, OREPA zone 2
0.0%at or above 4 pCi/L
Median 0.4 pCi/L · 1 test
- Radon levels in Grant County, OREPA zone 2
0.0%at or above 4 pCi/L
Median 0.2 pCi/L · 1 test
- Radon levels in Wheeler County, OREPA zone 2
No CDC figure for 2016; its page reads it against its own neighbours.
Morrow County, Cities and towns
Cities and towns in Morrow County
The Census Bureau estimates 12,602 residents in Morrow County for July 1, 2025, 383 more than in 2020 (+3.1%). Spread over its land, that is 6.2 people to the square mile. Its largest town, Boardman, has 4,495 residents, 35.7% of the total. Together its 5 incorporated places hold 65.3% of those residents; the other 34.7% live outside any of them. CDC's 6 reported tests for 2019 work out to 0.5 per 1,000 residents (2025 estimate), close to Oregon's 0.6.
From Boardman to Lexington, CDC publishes no figure by town: each reads Morrow County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Boardman | 4,495 | +17.0% | 35.7% |
| Irrigon | 2,042 | +1.4% | 16.2% |
| Heppner | 1,128 | −5.9% | 9.0% |
| Ione | 330 | −4.1% | 2.6% |
| Lexington | 233 | −5.3% | 1.8% |
5 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).
Morrow County, Homes
Homes in Morrow County
Mobile homes are 33% of Morrow County's 4,813 homes and detached houses 55%, against 63% across Oregon. Half of its homes were built before 1980, close to Oregon's 1980: 19% date from before 1960 and 20% from 2000 or later. 71% of occupied homes are lived in by their owner (Oregon: 63%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Morrow County | Oregon |
|---|---|---|
| Housing units | 4,813 | 1,838,631 |
| Detached houses | 55% | 63% |
| In buildings of 5 or more | 6% | 17% |
| Mobile homes | 33% | 8% |
| Built before 1960 | 19% | 23% |
| Built since 2000 | 20% | 24% |
| Middle year built | 1980 | 1980 |
| Owner-occupied | 71% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.