Short-term kit
RA400 short-term liquid scintillation radon test kit, lab fee included
- Lab fee included
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Martin County, Indiana
EPA puts Martin County in Zone 2, its middle 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
44.1%
Dubois County
- Dubois
- 44.1%
- Greene
- 32.7%
4 of 5 neighbours have 30+ tests, 2008 to 2017
Nearest county
34.5%
Daviess County, 15 miles
- Daviess
- 34.5%
- Indiana
- 38.9%
Share at 4+ pCi/L, 58 tests, 2008 to 2017
Ground above low
100.0%
Level with Indiana
- Martin
- 100.0%
- Indiana
- 100.0%
Share of land USGS rates moderate or high potential
Tests reported
8
Too few for a share
- Martin
- 8
- Needed
- 30
2008 to 2017, laboratory
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 Martin 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
Martin County, At a glance
Martin County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Martin 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 Martin County, 2008 to 2017, laboratory
CDC holds 8 reported tests for Martin 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). Martin County beside the counties around it is how this page reads it.
What these figures count
Only 8 tests were reported to CDC for Martin 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).
Martin County, Compared
Martin County radon figures, compared
Calculated by Radon411CDC's largest figure for Martin County rests on 8 tests over the 2008 to 2017 laboratory totals, 3 of them at or above 4 pCi/L, so each test moves its share by 12.5 points and no rank or comparison is drawn from it. Results reached as high as 10.6 pCi/L, with a middle value of 3.7 pCi/L.
Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Dubois County reported the largest share at or above 4 pCi/L, 44.1%, and Greene County the smallest, 32.7%, with Lawrence County at 35.6% and Daviess County at 34.5% between. Farther out, Knox County (33 miles away) at 43.1%, Monroe County (35 miles away) at 34.2% and Washington County (38 miles away) at 42.1% have figures too. Pooled across 92 Indiana counties, 38.9% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Miami County reported the highest share (63.3%) and Jasper County the lowest (14.1%). EPA's 1993 map puts Martin 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.
Martin County, Geology
The ground under Martin County
PredictedUSGS's geologic map puts all of Martin County's mapped land in one class: moderate radon potential. The map puts 67.9% of Martin County in the area it calls Wabash Lowland and 32.1% in Crawford Upland/Mitchell Plain/Norman Upland. USGS gives the first a radon index of 10 and the second 11, both in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Wabash Lowland | Loess, pre-Wisconsinan glacial deposits, Pennsylvanian shale, sandstone, and carbonate bedrock. | Moderate | 10 | 67.9% |
| Crawford Upland/Mitchell Plain/Norman Upland | Unglaciated, underlain by karsted Mississippian carbonate rocks. | Moderate | 11 | 32.1% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Martin County beside the ground around it
Across Indiana 56.6% of the land is rated high; none of Martin County's is. Of the 5 counties that border it, none has as large a share of moderate-potential ground; Daviess County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Martin County, Local resources
Radon testing and mitigation in Martin County
- Indiana's radon programIndiana Department of HealthIndiana's radon program licenses or certifies radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in Indiana.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
To purchase a low-cost radon short term or long term test kit, please visit the American Lung Association
- Compare kits
- Professionals in Indiana17 professionals are listed in Indiana.
What Indiana's program says
- Phone
- 1-800-272-9723
- Licensing of radon professionals
According to the Indiana Radon Rule, 410 IAC 5.1, everyone who is serving Indiana by doing radon testing, analysis and mitigation (radon reduction) in residential structures must be certified by the Indiana State Department of Health.
What it means
Martin County, Questions
Questions about radon in Martin County
Are radon levels high in Martin County?
Over the 2008 to 2017 laboratory totals, 37.5% of the radon tests reported to CDC for Martin County, Indiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.7 pCi/L. Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Dubois County reported the largest share at or above 4 pCi/L, 44.1%, and Greene County the smallest, 32.7%, with Lawrence County at 35.6% and Daviess County at 34.5% between.
Which counties border Martin County?
Martin County borders 5 counties: Daviess County, Lawrence County, Orange County, Greene County and Dubois County.
Products
Martin County, Products
Testing a home in Martin County
No CDC figure names Martin County; the nearest county with one, Daviess County (15 miles away), reported 34.5% 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 2 a short-term kit (2 to 90 days) is the quick first check in Martin 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
Monitor
RadonPro Wi-Fi radon monitor with a built-in Geiger counter
- C-NRPP 2024/25: Not included
- Plug-in
- Wi-Fi
- Alarm
- Screen, app
First reading: Within 5 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Martin County, Bordering counties
Counties bordering Martin County
Calculated by Radon411- Radon levels in Dubois CountyEPA zone 2
44.1%at or above 4 pCi/L
Median 3.7 pCi/L · 136 tests
- Radon levels in Orange CountyEPA zone 1
43.5%at or above 4 pCi/L
Median 2.9 pCi/L · 23 tests
- Radon levels in Lawrence CountyEPA zone 1
35.6%at or above 4 pCi/L
Median 2.7 pCi/L · 267 tests
- Radon levels in Daviess CountyEPA zone 2
34.5%at or above 4 pCi/L
Median 3.1 pCi/L · 58 tests
- Radon levels in Greene CountyEPA zone 2
32.7%at or above 4 pCi/L
Median 3.0 pCi/L · 49 tests
Martin County, Cities and towns
Cities and towns in Martin County
Martin County's population has barely moved since 2020: 9,856 residents on July 1, 2025 against 9,808 then, by the Census Bureau's estimates. That works out to 29 people per square mile of land. Its largest town, Loogootee, has 2,633 residents, 26.7% of the total. Together its 3 incorporated places hold 35.3% of those residents; the other 64.7% live outside any of them. Reported testing is thin here: 8 tests over 2008 to 2017, or 0.8 for every 1,000 residents (2025 estimate), where Indiana as a whole comes to 6.2.
From Loogootee to Crane, CDC publishes no figure by town: each reads Martin County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Loogootee | 2,633 | +1.5% | 26.7% |
| Shoals | 677 | −0.4% | 6.9% |
| Crane | 165 | −0.6% | 1.7% |
3 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).
Martin County, Homes
Homes in Martin County
Of Martin County's 4,583 homes, 73% are detached houses, against 73% across Indiana; 17% are mobile homes. Half of its homes were built before 1980, close to Indiana's 1976: 26% date from before 1960 and 18% from 2000 or later. Owners live in 78% of the occupied homes (Indiana: 70%), so for most households a test and a fix are their own to order.
| Homes | Martin County | Indiana |
|---|---|---|
| Housing units | 4,583 | 2,953,344 |
| Detached houses | 73% | 73% |
| In buildings of 5 or more | 2% | 13% |
| Mobile homes | 17% | 4% |
| Built before 1960 | 26% | 32% |
| Built since 2000 | 18% | 21% |
| Middle year built | 1980 | 1976 |
| Owner-occupied | 78% | 70% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.