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 Indiana County, Pennsylvania
EPA puts Indiana County in Zone 1, its highest radon zone, and high results are common there: 44.3% of the 228 radon tests reported to CDC (2020) came back 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
44.3%
14.0 pts above PA
- Indiana
- 44.3%
- PA
- 30.3%
228 tests, 2020
Median result
3.6pCi/L
Below action level
- Indiana
- 3.6 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2020
Tests reported
228
41st of 63 by tests
- Indiana
- 228
- Montgomery
- 10,508
Reported to CDC before any fix, 2020
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Rank in PA
17 of 63
Middle half
- Indiana
- 44.3%
- Perry
- 57.7%
By share, of 63 with 30+ tests
Read a result for Indiana County
Starts at Indiana County's median, 3.6 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.6 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Indiana County's median reported result, 2020.
The data
Indiana County, At a glance
Indiana County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Indiana County in
USGS geologic potential: High across 77% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Indiana County, 2020
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 47.9% |
| 2015 | 46.8% |
| 2016 | 46.9% |
| 2017 | 51.7% |
| 2018 | 46.4% |
| 2019 | 45.3% |
| 2020 | 44.3% |
2020: 44.3%. Across these years the share ran from 44.3% to 51.7%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 228 tests reported to CDC for Indiana County over 2020, 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: 2020. Measured data period: 2005 to 2020 (every CDC figure on file).
Indiana County, Compared
Indiana County radon figures, compared
Calculated by Radon411In Indiana County, about 4 in 10 reported tests in 2020 (101 of 228) were at or above EPA's action level. Against the national pool of 25.5%, the gap is 18.8 points higher. Across 67 Pennsylvania counties pooled together, 30.3% of tests reached that level, so Indiana County runs 14.0 points above its state.
Of 5 neighbours with a figure, 3 reported a larger share at or above 4 pCi/L and 2 a smaller one; the spread is 34.9% (Westmoreland County) to 47.6% (Armstrong County). By share, Indiana County is 17th of 63 Pennsylvania counties with 30 or more tests for the same period.
Year by year, 2014 opened at 47.9% and 2020 closed at 44.3% (down 3.6 points), with 2017 the high at 51.7%. Half the tests came in under 3.6 pCi/L and half over it; the single highest reached 121.1 pCi/L. Below the action level, 54 tests (23.7%) came in under 2 pCi/L, against 44.3% statewide, and 73 tests (32.0%) fell between 2 and 4, against 25.4% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 44.3% share point the same way here. USGS geology rates 77% of the county's land high radon potential.
The busiest year on file was 2019, with 362 tests reported; the quietest, 2020, had 228.
Indiana CountyPennsylvania, pooled
44.3% % of tests30.3% % of tests
| Year | Tests | Indiana County, at or above 4 pCi/L | Pennsylvania, pooled |
|---|---|---|---|
| 2014 | 280 | 47.9% | 36.1% |
| 2015 | 312 | 46.8% | 37.8% |
| 2016 | 273 | 46.9% | 34.4% |
| 2017 | 267 | 51.7% | 35.1% |
| 2018 | 252 | 46.4% | 30.5% |
| 2019 | 362 | 45.3% | 31.4% |
| 2020 | 228 | 44.3% | 30.3% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Indiana County, State data
Pennsylvania's own radon test data
MeasuredWhat Pennsylvania's own agencies publish about radon tests in Indiana County, with their period. These are not CDC's figures and are never added to them.
MeasuredState figures, not CDC's
What Pennsylvania DEP reports for the ZIP codes in Indiana County
Pennsylvania DEP publishes its figures by ZIP code, not by county. These are the 50 ZIP codes that lie wholly or partly in Indiana County, each with the state's own figures for it. Period: Period not stated by DEP.
| ZIP code | What the state reports |
|---|---|
| 15618 | Basement: average 4.7 pCi/L, 99 tests; First floor: figures not shown |
| 15681 | Basement: average 9.0 pCi/L, 241 tests; First floor: figures not shown |
| 15701 | Basement: average 6.9 pCi/L, 4,062 tests; First floor: average 3.7 pCi/L, 370 tests |
| 15705 | Basement: average 1.1 pCi/L, 176 tests |
| 15710 | Basement: figures not shown; First floor: figures not shown |
| 15712 | Basement: figures not shown |
| 15713 | Basement: figures not shown; First floor: figures not shown |
| 15714 | Basement: average 6.2 pCi/L, 237 tests; First floor: figures not shown |
| 15716 | Basement: figures not shown; First floor: figures not shown |
| 15717 | Basement: average 5.5 pCi/L, 731 tests; First floor: average 6.1 pCi/L, 57 tests |
| 15720 | Basement: figures not shown; First floor: figures not shown |
| 15723 | Basement: figures not shown |
| 15724 | Basement: average 12.9 pCi/L, 72 tests; First floor: figures not shown |
| 15725 | Basement: average 10.3 pCi/L, 84 tests; First floor: figures not shown |
| 15727 | Basement: figures not shown |
| 15728 | Basement: average 5.8 pCi/L, 102 tests; First floor: figures not shown |
| 15729 | Basement: average 9.6 pCi/L, 35 tests; First floor: figures not shown |
| 15731 | Basement: figures not shown; First floor: figures not shown |
| 15732 | Basement: average 6.2 pCi/L, 107 tests; First floor: figures not shown |
| 15734 | Basement: figures not shown |
| 15739 | Basement: figures not shown; First floor: figures not shown |
| 15741 | Basement: figures not shown |
| 15742 | Basement: average 19.3 pCi/L, 52 tests; First floor: figures not shown |
| 15745 | Basement: figures not shown; First floor: figures not shown |
| 15746 | Basement: figures not shown |
| 15747 | Basement: average 10.7 pCi/L, 144 tests; First floor: figures not shown |
| 15748 | Basement: average 7.1 pCi/L, 361 tests; First floor: average 5.8 pCi/L, 38 tests |
| 15750 | Basement: figures not shown |
| 15752 | Basement: figures not shown |
| 15754 | Basement: figures not shown; First floor: figures not shown |
| 15756 | Basement: figures not shown; First floor: figures not shown |
| 15757 | Basement: average 10.5 pCi/L, 34 tests; First floor: figures not shown |
| 15759 | Basement: average 14.5 pCi/L, 117 tests; First floor: figures not shown |
| 15765 | Basement: average 10.2 pCi/L, 114 tests; First floor: figures not shown |
| 15767 | Basement: average 13.4 pCi/L, 843 tests; First floor: average 7.6 pCi/L, 111 tests |
| 15771 | Basement: average 17.1 pCi/L, 39 tests; First floor: figures not shown |
| 15772 | Basement: average 8.3 pCi/L, 46 tests; First floor: figures not shown |
| 15774 | Basement: average 10.7 pCi/L, 163 tests; First floor: figures not shown |
| 15777 | Basement: figures not shown; First floor: figures not shown |
| 15783 | Basement: figures not shown; First floor: figures not shown |
| 15920 | Basement: average 11.0 pCi/L, 37 tests |
| 15929 | Basement: figures not shown |
| 15944 | Basement: average 7.3 pCi/L, 136 tests; First floor: figures not shown |
| 15949 | Basement: figures not shown; First floor: figures not shown |
| 15954 | Basement: average 10.4 pCi/L, 85 tests; First floor: figures not shown |
| 15957 | Basement: figures not shown; First floor: figures not shown |
| 15961 | Basement: average 5.3 pCi/L, 32 tests; First floor: figures not shown |
| 16222 | Basement: average 11.9 pCi/L, 47 tests; First floor: figures not shown |
| 16246 | Basement: figures not shown |
| 16256 | Basement: figures not shown; First floor: figures not shown |
- DEP's report gives the number of tests, the highest result and the average result for each floor tested; it states no period.
- DEP says the smartest thing to do is to test your home for radon, no matter where you live.
- A ZIP code that crosses the county line is listed whole; its figures cover all of it.
Measured: Pennsylvania DEP data, Period not stated by DEP.
Indiana County, Geology
The ground under Indiana County
PredictedMost of the ground under Indiana County is one class on USGS's geologic map: 76.8% of its land is high radon potential, with 23.2% moderate. The map puts 69.1% of Indiana County in the area it calls Pennsylvanian Rocks of the Pittsburgh Low Plateau and 23.2% in Allegheny Mountain Section, with one smaller area beside them. USGS gives the first a radon index of 14, in the high band (12 to 17), and the second 11, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Pennsylvanian Rocks of the Pittsburgh Low Plateau | Pennsylvanian marine shale, siltstone, sandstone, limestone, and coal. | High | 14 | 69.1% |
| Allegheny Mountain Section | Pennsylvanian sandstone, siltstone, shale, limestone, coal. | Moderate | 11 | 23.2% |
| Mountainous High Plateau | Sandstone, shale and conglomerate. | High | 12 | 7.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Indiana County beside the ground around it
On high-potential ground Indiana County is close to Pennsylvania as a whole: 76.8% of its land against 70.4%. Of the 5 counties that border it, 2 have more high-potential ground, Armstrong County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Indiana County, Local resources
Radon testing and mitigation in Indiana County
- Radon DivisionRadon Division, run by Department of Environmental Protection, licenses or certifies radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in Pennsylvania.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Through an EPA-funded program, hospitals give parents of newborn children a packet of information which includes a coupon for a free radon test kit from the DEP.
- Compare kits
- Professionals in Pennsylvania151 professionals are listed in Pennsylvania.
What Pennsylvania's program says
- Phone
- 800-237-2366
- Licensing of radon professionals
The Radon Certification Act requires DEP to establish by regulation, a certification program for persons conducting radon gas and radon progeny testing, laboratory analysis and mitigation of radon contamination in buildings.
What it means
Indiana County, Questions
Questions about radon in Indiana County
Are radon levels high in Indiana County?
In 2020, 44.3% of the radon tests reported to CDC for Indiana County, Pennsylvania were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.6 pCi/L. Of 63 Pennsylvania counties with 30 or more tests for the same period, 16 reported a higher share; pooled, the state comes to 30.3%.
Which counties border Indiana County?
Indiana County borders 5 counties: Cambria County, Armstrong County, Westmoreland County, Jefferson County and Clearfield County.
Products
Indiana County, Products
Testing a home in Indiana County
In Indiana County, 44.3% of 228 tests reported to CDC in 2020 reached 4 pCi/L, against 30.3% pooled across Pennsylvania. In Zone 1 the year-round level in Indiana 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
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
Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Indiana County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Indiana County
Explore
Indiana County, Bordering counties
Counties bordering Indiana County
Calculated by Radon411- Radon levels in Armstrong CountyEPA zone 1
47.6%at or above 4 pCi/L
Median 3.7 pCi/L · 187 tests · 3.3 points above Indiana County
- Radon levels in Clearfield CountyEPA zone 1
47.5%at or above 4 pCi/L
Median 3.6 pCi/L · 394 tests · 3.2 points above Indiana County
- Radon levels in Cambria CountyEPA zone 2
44.7%at or above 4 pCi/L
Median 3.3 pCi/L · 329 tests · 0.4 points above Indiana County
- Radon levels in Jefferson CountyEPA zone 2
38.6%at or above 4 pCi/L
Median 2.6 pCi/L · 254 tests · 5.7 points below Indiana County
- Radon levels in Westmoreland CountyEPA zone 1
34.9%at or above 4 pCi/L
Median 2.6 pCi/L · 1,588 tests · 9.4 points below Indiana County
Indiana County, Cities and towns
Cities and towns in Indiana County
Indiana County's population has barely moved since 2020: 82,878 residents on July 1, 2025 against 83,158 then, by the Census Bureau's estimates. That works out to 100 people per square mile of land. No town dominates: Indiana, the largest, has 14,697 residents, 17.7% of the total. Together its 14 incorporated places hold 28.7% of those residents; the other 71.3% live outside any of them. Reported testing is thin here: 228 tests over 2020, or 2.8 for every 1,000 residents (2025 estimate), where Pennsylvania as a whole comes to 7.2.
From Indiana to Smicksburg, CDC publishes no figure by town: each reads Indiana County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Indiana | 14,697 | +4.8% | 17.7% |
| Blairsville | 3,176 | −1.3% | 3.8% |
| Homer City | 1,708 | −1.2% | 2.1% |
| Clymer | 1,304 | −1.1% | 1.6% |
| Saltsburg | 761 | −1.3% | 0.9% |
| Ernest | 410 | −1.7% | 0.5% |
| Marion Center | 404 | −1.0% | 0.5% |
| Creekside | 280 | −1.4% | 0.3% |
| Cherry Tree | 271 | −1.1% | 0.3% |
| Glen Campbell | 250 | −1.6% | 0.3% |
| Plumville | 247 | −1.6% | 0.3% |
| Armagh | 99 | −2.0% | 0.1% |
- Shelocta
- Smicksburg
14 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).
Indiana County, Homes
Homes in Indiana County
Of Indiana County's 37,672 homes, 67% are detached houses, against 57% across Pennsylvania; 12% are in buildings of five or more homes. Half of its homes were built before 1969, close to Pennsylvania's 1965: 40% date from before 1960 and 11% from 2000 or later. 71% of occupied homes are lived in by their owner (Pennsylvania: 69%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Indiana County | Pennsylvania |
|---|---|---|
| Housing units | 37,672 | 5,779,663 |
| Detached houses | 67% | 57% |
| In buildings of 5 or more | 12% | 13% |
| Mobile homes | 9% | 4% |
| Built before 1960 | 40% | 45% |
| Built since 2000 | 11% | 14% |
| Middle year built | 1969 | 1965 |
| Owner-occupied | 71% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.