Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Minidoka County, Idaho
EPA puts Minidoka County in Zone 2, its middle radon zone, and 15.3% of its 72 reported radon tests (2008 to 2017, laboratory totals) were at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
15.3%
26.2 pts below ID
- Minidoka
- 15.3%
- Idaho
- 41.5%
72 tests, 2008 to 2017
Median result
1.8pCi/L
Below action level
- Minidoka
- 1.8 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
72
24th of 37 by tests
- Minidoka
- 72
- Ada
- 3,030
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Rank in Idaho
35 of 37
Lowest quarter
- Minidoka
- 15.3%
- Bear Lake
- 78.1%
By share, of 37 with 30+ tests
Read a result for Minidoka County
Starts at Minidoka County's median, 1.8 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.8 pCi/L
Below 2 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Minidoka County's median reported result, 2008 to 2017.
The data
Minidoka County, At a glance
Minidoka County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Minidoka 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 Minidoka County, 2008 to 2017, laboratory
Under 2 pCi/L: 57%2 to 4 pCi/L: 28%4 pCi/L and above: 15%
Of 72 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 41 | 56.9% |
| 2 to 4 pCi/L | 20 | 27.8% |
| 4 pCi/L and above | 11 | 15.3% |
What these figures count
These are the 72 tests reported to CDC for Minidoka County over 2008 to 2017 (laboratory totals), many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.
Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Minidoka County, Compared
Minidoka County radon figures, compared
Calculated by Radon411Minidoka County's 72 reported tests over the 2008 to 2017 laboratory totals had a middle value of 1.8 pCi/L and a maximum of 20.0 pCi/L, and 15.3% reached 4 pCi/L. Idaho as a whole (44 Idaho counties, pooled) comes to 41.5%: 26.2 points higher than here.
Among its state's counties it ranks 35th of 37 Idaho counties with 30 or more tests for the same period. Statewide for the same period, Bear Lake County reported the highest share (78.1%) and Payette County the lowest (4.9%).
Below the action level, 41 tests (56.9%) came in under 2 pCi/L, against 31.5% statewide, and 20 tests (27.8%) fell between 2 and 4, against 26.9% statewide. CDC's ten-year totals for Minidoka County went from 61 tests (2005 to 2014) to 72 (2008 to 2017), the share going from 14.8% to 15.3%.
EPA's 1993 zone map puts Minidoka County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.
Next door, the shares run from 16.9% in Jerome County to 59.5% in Cassia County.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Minidoka County, Geology
The ground under Minidoka County
PredictedUSGS's geologic map puts all of Minidoka County's mapped land in one class: moderate radon potential. The map puts 81.5% of Minidoka County in the area it calls Eastern Snake river plain and Malheur-Boise-King Section and 18.5% in Owyhee Upland. USGS gives the first a radon index of 10 and the second 9, both in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Eastern Snake river plain and Malheur-Boise-King Section | Basalt flows. | Moderate | 10 | 81.5% |
| Owyhee Upland | Tertiary and Quaternary basalt, andesite, and rhyolite. | Moderate | 9 | 18.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Minidoka County beside the ground around it
Across Idaho 50.7% of the land is rated high; none of Minidoka County's is. Of the 4 counties that border it, 2 have more high-potential ground, Blaine County the most at 63.2%.
The map rates the ground, not the air in any home.
Local help
Minidoka County, Local resources
Radon testing and mitigation in Minidoka County
- DHW Environmental Health ProgramDHW Environmental Health Program, run by Idaho Department of Health and Welfare, offers free or discounted test kits, and answers questions about testing and mitigation in Idaho.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Order a free radon test kit.
- Compare kits
- See the Idaho directoryNo professionals are listed in Idaho yet. The state program can point you to registered testers and mitigators.
What Idaho's program says
- Phone
- 800-445-8647
- radon@dhw.idaho.gov
What it means
Minidoka County, Questions
Questions about radon in Minidoka County
Are radon levels high in Minidoka County?
Over the 2008 to 2017 laboratory totals, 15.3% of the radon tests reported to CDC for Minidoka County, Idaho were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.8 pCi/L. Of 37 Idaho counties with 30 or more tests for the same period, 34 reported a higher share; pooled, the state comes to 41.5%.
Which counties border Minidoka County?
Minidoka County borders 4 counties: Blaine County, Lincoln County, Jerome County and Cassia County.
Products
Minidoka County, Products
Testing a home in Minidoka County
In Minidoka County, 15.3% of 72 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 41.5% pooled across Idaho. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Minidoka County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
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
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
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Minidoka County, Bordering counties
Counties bordering Minidoka County
Calculated by Radon411- Radon levels in Cassia CountyEPA zone 2
59.5%at or above 4 pCi/L
Median 5.4 pCi/L · 121 tests · 44.2 points above Minidoka County
- Radon levels in Blaine CountyEPA zone 1
57.7%at or above 4 pCi/L
Median 5.3 pCi/L · 352 tests · 42.4 points above Minidoka County
- Radon levels in Lincoln CountyEPA zone 2
40.0%at or above 4 pCi/L
Median 3.3 pCi/L · 20 tests · 24.7 points above Minidoka County
- Radon levels in Jerome CountyEPA zone 2
16.9%at or above 4 pCi/L
Median 1.9 pCi/L · 65 tests · 1.6 points above Minidoka County
Minidoka County, Cities and towns
Cities and towns in Minidoka County
Minidoka County is growing: the Census Bureau puts it at 22,911 residents on July 1, 2025, up 5.7% from 21,669 in 2020. That works out to 30 people per square mile of land. Burley, the largest place on its list (12,409 residents in all), extends beyond Minidoka County, so no share of the total is worked out for it. Reported testing is thin here: 72 tests over 2008 to 2017, or 3.1 for every 1,000 residents (2025 estimate), where Idaho as a whole comes to 6.4.
From Burley to Minidoka, CDC publishes no figure by town: each reads Minidoka County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Burleyextends beyond Minidoka County | 12,409 | +5.5% | Counted whole |
| Rupert | 6,460 | +6.6% | 28.2% |
| Heyburn | 3,783 | +3.1% | 16.5% |
| Paul | 1,722 | +43.7% | 7.5% |
| Acequia | 134 | +3.9% | 0.6% |
| Minidoka | 95 | +2.2% | 0.4% |
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). A place that extends beyond Minidoka County is counted whole, so it has no share.
Minidoka County, Homes
Homes in Minidoka County
Minidoka County is a place of houses on their own lots: 79% of its 8,478 homes are detached single-family houses, against 74% across Idaho. The homes are older than Idaho's as a whole: half were built before 1976 (1990 for Idaho), and 27% date from before 1960. 73% of occupied homes are lived in by their owner (Idaho: 72%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Minidoka County | Idaho |
|---|---|---|
| Housing units | 8,478 | 776,683 |
| Detached houses | 79% | 74% |
| In buildings of 5 or more | 3% | 9% |
| Mobile homes | 10% | 7% |
| Built before 1960 | 27% | 18% |
| Built since 2000 | 17% | 35% |
| Middle year built | 1976 | 1990 |
| Owner-occupied | 73% | 72% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.