Short-term kit
RA100 short-term liquid scintillation radon test kit
- Lab fee extra
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Starke County, Indiana
EPA puts Starke County in Zone 2, its middle radon zone, and only 24 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
58.2%
LaPorte County
- LaPorte
- 58.2%
- Jasper
- 14.1%
6 of 7 neighbours have 30+ tests, 2008 to 2017
Nearest county
58.2%
LaPorte County, 19 miles
- LaPorte
- 58.2%
- Indiana
- 38.9%
Share at 4+ pCi/L, 792 tests, 2008 to 2017
Ground above low
100.0%
Level with Indiana
- Starke
- 100.0%
- Indiana
- 100.0%
Share of land USGS rates moderate or high potential
Tests reported
24
Too few for a share
- Starke
- 24
- 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 Starke 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
Starke County, At a glance
Starke County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Starke County is a
USGS geologic potential: Moderate across 99% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Starke County, 2008 to 2017, laboratory
CDC holds 24 reported tests for Starke County over the 2008 to 2017 laboratory totals, with a median of 1.6 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Starke County beside the counties around it is how this page reads it.
What these figures count
Only 24 tests were reported to CDC for Starke 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).
Starke County, Compared
Starke County radon figures, compared
Calculated by Radon411CDC's largest figure for Starke County rests on 24 tests over the 2008 to 2017 laboratory totals, 1 of them at or above 4 pCi/L, so each test moves its share by 4.2 points and no rank or comparison is drawn from it. Results reached as high as 6.1 pCi/L, with a middle value of 1.6 pCi/L.
Of the counties bordering it, 6 have a figure over the 2008 to 2017 laboratory totals: LaPorte County reported the largest share at or above 4 pCi/L, 58.2%, and Jasper County the smallest, 14.1%, with Porter County at 46.5%, Fulton County at 46.4% and Marshall County at 39.7% between. Farther out, White County (38 miles away) at 35.7% and Cass County (39 miles away) at 34.1% 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 Starke County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 99% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Starke County, Geology
The ground under Starke County
PredictedMost of the ground under Starke County is one class on USGS's geologic map: 98.5% of its land is moderate radon potential, with 1.5% high. 98.5% of it lies in the area the map calls Kankakee Outwash and Lacustrine Plain, to which USGS gives a radon index of 10, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Kankakee Outwash and Lacustrine Plain | Moraine deposits, outwash and dune sands. | Moderate | 10 | 98.5% |
| Saginaw Lobe | Clayey and loamy glacial deposits. | High | 12 | 1.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Starke County beside the ground around it
Indiana as a whole has more high-potential ground than Starke County: 56.6% of its land, against 1.5% here. Of the 7 counties that border it, 5 have more high-potential ground, Fulton County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Starke County, Local resources
Radon testing and mitigation in Starke 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
Starke County, Questions
Questions about radon in Starke County
Are radon levels high in Starke County?
Over the 2008 to 2017 laboratory totals, 4.2% of the radon tests reported to CDC for Starke County, Indiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.6 pCi/L. Of the counties bordering it, 6 have a figure over the 2008 to 2017 laboratory totals: LaPorte County reported the largest share at or above 4 pCi/L, 58.2%, and Jasper County the smallest, 14.1%, with Porter County at 46.5%, Fulton County at 46.4% and Marshall County at 39.7% between.
Which counties border Starke County?
Starke County borders 7 counties: LaPorte County, Marshall County, Pulaski County, Porter County, Fulton County, St. Joseph County and Jasper County.
Products
Starke County, Products
Testing a home in Starke County
No CDC figure names Starke County; the nearest county with one, LaPorte County (19 miles away), reported 58.2% 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 Starke 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
MonitorAEGTEST
HOUND-3699 radon monitor with a 2.1-inch touchscreen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
First reading: Within 1 hour
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Starke County, Bordering counties
Counties bordering Starke County
Calculated by Radon411- Radon levels in LaPorte CountyEPA zone 2
58.2%at or above 4 pCi/L
Median 5.0 pCi/L · 792 tests
- Radon levels in Porter CountyEPA zone 2
46.5%at or above 4 pCi/L
Median 3.5 pCi/L · 1,136 tests
- Radon levels in Fulton CountyEPA zone 1
46.4%at or above 4 pCi/L
Median 3.3 pCi/L · 97 tests
- Radon levels in Marshall CountyEPA zone 1
39.7%at or above 4 pCi/L
Median 3.2 pCi/L · 383 tests
- Radon levels in Pulaski CountyEPA zone 2
31.8%at or above 4 pCi/L
Median 2.3 pCi/L · 22 tests
- Radon levels in St. Joseph CountyEPA zone 1
29.3%at or above 4 pCi/L
Median 2.7 pCi/L · 7,346 tests
- Radon levels in Jasper CountyEPA zone 2
14.1%at or above 4 pCi/L
Median 1.2 pCi/L · 71 tests
Starke County, Cities and towns
Cities and towns in Starke County
Starke County's population has barely moved since 2020: 23,425 residents on July 1, 2025 against 23,397 then, by the Census Bureau's estimates. That works out to 76 people per square mile of land. No town dominates: Knox, the largest, has 3,601 residents, 15.4% of the total. Together its 3 incorporated places hold 26.3% of those residents; the other 73.7% live outside any of them. Reported testing is thin here: 24 tests over 2008 to 2017, or 1.0 for every 1,000 residents (2025 estimate), where Indiana as a whole comes to 6.2.
From Knox to Hamlet, CDC publishes no figure by town: each reads Starke County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Knox | 3,601 | −1.2% | 15.4% |
| North Judson | 1,802 | −2.8% | 7.7% |
| Hamlet | 768 | +0.5% | 3.3% |
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).
Starke County, Homes
Homes in Starke County
Starke County is a place of houses on their own lots: 85% of its 11,214 homes are detached single-family houses, against 73% across Indiana. Half of its homes were built before 1973, close to Indiana's 1976: 35% date from before 1960 and 16% from 2000 or later. Owners live in 84% of the occupied homes (Indiana: 70%), so for most households a test and a fix are their own to order.
| Homes | Starke County | Indiana |
|---|---|---|
| Housing units | 11,214 | 2,953,344 |
| Detached houses | 85% | 73% |
| In buildings of 5 or more | 3% | 13% |
| Mobile homes | 9% | 4% |
| Built before 1960 | 35% | 32% |
| Built since 2000 | 16% | 21% |
| Middle year built | 1973 | 1976 |
| Owner-occupied | 84% | 70% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.