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 Orange County, Indiana
EPA puts Orange County in Zone 1, its highest radon zone, and only 23 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%
- Lawrence
- 35.6%
3 of 5 neighbours have 30+ tests, 2008 to 2017
Nearest county
35.6%
Lawrence County, 21 miles
- Lawrence
- 35.6%
- Indiana
- 38.9%
Share at 4+ pCi/L, 267 tests, 2008 to 2017
Ground above low
100.0%
Level with Indiana
- Orange
- 100.0%
- Indiana
- 100.0%
Share of land USGS rates moderate or high potential
Tests reported
25
Too few for a share
- Orange
- 25
- Needed
- 30
2007 to 2016, 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 Orange 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
Orange County, At a glance
Orange County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Orange County in
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 Orange County, 2008 to 2017, laboratory
CDC holds 23 reported tests for Orange County over the 2008 to 2017 laboratory totals, with a median of 2.9 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Orange County beside the counties around it is how this page reads it.
What these figures count
Only 23 tests were reported to CDC for Orange 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).
Orange County, Compared
Orange County radon figures, compared
Calculated by Radon411CDC's largest figure for Orange County rests on 25 tests over the 2007 to 2016 laboratory totals, 10 of them at or above 4 pCi/L, so each test moves its share by 4.0 points and no rank or comparison is drawn from it. Results reached as high as 23.4 pCi/L, with a middle value of 2.9 pCi/L.
Of the counties bordering it, 3 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 Lawrence County the smallest, 35.6%, with Washington County at 42.1% between. Farther out, Harrison County (32 miles away) at 62.4%, Daviess County (33 miles away) at 34.5% and Jackson County (35 miles away) at 27.3% 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 Orange 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 moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Orange County, Geology
The ground under Orange County
PredictedUSGS's geologic map puts all of Orange County's mapped land in one class: moderate radon potential. The map puts 93.8% of Orange County in the area it calls Crawford Upland/Mitchell Plain/Norman Upland and 6.2% in Wabash Lowland. USGS gives the first a radon index of 11 and the second 10, both in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Crawford Upland/Mitchell Plain/Norman Upland | Unglaciated, underlain by karsted Mississippian carbonate rocks. | Moderate | 11 | 93.8% |
| Wabash Lowland | Loess, pre-Wisconsinan glacial deposits, Pennsylvanian shale, sandstone, and carbonate bedrock. | Moderate | 10 | 6.2% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Orange County beside the ground around it
Across Indiana 56.6% of the land is rated high; none of Orange County's is. Of the 5 counties that border it, none has as large a share of moderate-potential ground; Crawford County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Orange County, Local resources
Radon testing and mitigation in Orange 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
Orange County, Questions
Questions about radon in Orange County
Are radon levels high in Orange County?
Over the 2008 to 2017 laboratory totals, 43.5% of the radon tests reported to CDC for Orange County, Indiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.9 pCi/L. Of the counties bordering it, 3 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 Lawrence County the smallest, 35.6%, with Washington County at 42.1% between.
Which counties border Orange County?
Orange County borders 5 counties: Lawrence County, Martin County, Washington County, Crawford County and Dubois County.
Products
Orange County, Products
Testing a home in Orange County
No CDC figure names Orange County; the nearest county with one, Lawrence County (21 miles away), reported 35.6% 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 Orange 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-1085 palm-sized rechargeable radon detector
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Orange County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Orange County
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Orange County, Bordering counties
Counties bordering Orange 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 Washington CountyEPA zone 1
42.1%at or above 4 pCi/L
Median 3.5 pCi/L · 38 tests
- Radon levels in Martin CountyEPA zone 2
37.5%at or above 4 pCi/L
Median 3.7 pCi/L · 8 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 Crawford CountyEPA zone 2
30.0%at or above 4 pCi/L
Median 2.7 pCi/L · 10 tests
Orange County, Cities and towns
Cities and towns in Orange County
Orange County's population has barely moved since 2020: 19,834 residents on July 1, 2025 against 19,845 then, by the Census Bureau's estimates. That works out to 50 people per square mile of land. No town dominates: Paoli, the largest, has 3,596 residents, 18.1% of the total. Together its 4 incorporated places hold 41.2% of those residents; the other 58.8% live outside any of them. Reported testing is thin here: 25 tests over 2007 to 2016, or 1.3 for every 1,000 residents (2025 estimate), where Indiana as a whole comes to 5.7.
From Paoli to West Baden Springs, CDC publishes no figure by town: each reads Orange County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Paoli | 3,596 | −1.6% | 18.1% |
| Orleans | 2,073 | −1.3% | 10.5% |
| French Lick | 1,772 | +2.2% | 8.9% |
| West Baden Springs | 721 | +32.1% | 3.6% |
4 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).
Orange County, Homes
Homes in Orange County
Of Orange County's 9,083 homes, 75% are detached houses, against 73% across Indiana; 16% are mobile homes. Half of its homes were built before 1978, close to Indiana's 1976: 29% date from before 1960 and 19% from 2000 or later. Owners live in 79% of the occupied homes (Indiana: 70%), so for most households a test and a fix are their own to order.
| Homes | Orange County | Indiana |
|---|---|---|
| Housing units | 9,083 | 2,953,344 |
| Detached houses | 75% | 73% |
| In buildings of 5 or more | 4% | 13% |
| Mobile homes | 16% | 4% |
| Built before 1960 | 29% | 32% |
| Built since 2000 | 19% | 21% |
| Middle year built | 1978 | 1976 |
| Owner-occupied | 79% | 70% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.