Short-term kit
Air Chek Short-Term radon test kit you hang, lab fee included
- Lab fee included
In home: 72 to 168 hours
Locations and reports
Radon Levels in Greene County, Pennsylvania
EPA puts Greene County in Zone 2, its middle radon zone, and 20.0% of its 45 reported radon tests (2020) 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
20.0%
10.3 pts below PA
- Greene
- 20.0%
- PA
- 30.3%
45 tests, 2020
Median result
3.2pCi/L
Below action level
- Greene
- 3.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2020
Tests reported
45
62nd of 63 by tests
- Greene
- 45
- Montgomery
- 10,508
Reported to CDC before any fix, 2020
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 PA
59 of 63
Lowest quarter
- Greene
- 20.0%
- Perry
- 57.7%
By share, of 63 with 30+ tests
Read a result for Greene County
Starts at Greene County's median, 3.2 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.2 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. Greene County's median reported result, 2020.
The data
Greene County, At a glance
Greene County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Greene County is a
USGS geologic potential: Moderate across 92% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Greene County, 2020
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 38.6% |
| 2015 | 50.0% |
| 2016 | 31.6% |
| 2017 | 19.6% |
| 2018 | 34.9% |
| 2019 | 29.0% |
| 2020 | 20.0% |
2020: 20.0%. Across these years the share ran from 19.6% to 50.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 45 tests reported to CDC for Greene 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).
Greene County, Compared
Greene County radon figures, compared
Calculated by Radon411Greene County's 45 reported tests in 2020 had a middle value of 3.2 pCi/L and a maximum of 9.7 pCi/L, and 20.0% reached 4 pCi/L. Pennsylvania as a whole (67 Pennsylvania counties, pooled) comes to 30.3%: 10.3 points higher than here.
Among its state's counties it ranks 59th of 63 Pennsylvania counties with 30 or more tests for the same period. Statewide for the same period, Perry County reported the highest share (57.7%) and Philadelphia County the lowest (10.6%).
Below the action level, 11 tests (24.4%) came in under 2 pCi/L, against 44.3% statewide, and 25 tests (55.6%) fell between 2 and 4, against 25.4% statewide. The busiest year on file was 2018, with 63 tests reported; the quietest, 2015, had 34.
EPA's 1993 zone map puts Greene County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 92% of the county's land moderate radon potential.
Next door, the shares run from 17.4% in Fayette County to 33.6% in Washington County, with Fayette County below Greene County. Over 7 years of annual figures the share fell 18.6 points, from 38.6% in 2014 to 20.0% in 2020; its peak was 50.0% in 2015.
Greene CountyPennsylvania, pooled
20.0% % of tests30.3% % of tests
| Year | Tests | Greene County, at or above 4 pCi/L | Pennsylvania, pooled |
|---|---|---|---|
| 2014 | 44 | 38.6% | 36.1% |
| 2015 | 34 | 50.0% | 37.8% |
| 2016 | 57 | 31.6% | 34.4% |
| 2017 | 56 | 19.6% | 35.1% |
| 2018 | 63 | 34.9% | 30.5% |
| 2019 | 62 | 29.0% | 31.4% |
| 2020 | 45 | 20.0% | 30.3% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Greene County, State data
Pennsylvania's own radon test data
MeasuredWhat Pennsylvania's own agencies publish about radon tests in Greene 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 Greene County
Pennsylvania DEP publishes its figures by ZIP code, not by county. These are the 24 ZIP codes that lie wholly or partly in Greene County, each with the state's own figures for it. Period: Period not stated by DEP.
| ZIP code | What the state reports |
|---|---|
| 15315 | Basement: figures not shown |
| 15316 | Basement: figures not shown |
| 15320 | Basement: average 3.3 pCi/L, 82 tests; First floor: figures not shown |
| 15322 | Basement: average 6.1 pCi/L, 69 tests; First floor: figures not shown |
| 15325 | Basement: figures not shown |
| 15327 | Basement: figures not shown; First floor: figures not shown |
| 15329 | Basement: average 13.7 pCi/L, 43 tests; First floor: figures not shown |
| 15337 | Basement: figures not shown; First floor: figures not shown |
| 15338 | Basement: figures not shown; First floor: figures not shown |
| 15341 | Basement: figures not shown |
| 15344 | Basement: average 2.5 pCi/L, 32 tests; First floor: figures not shown |
| 15345 | Basement: average 10.7 pCi/L, 49 tests; First floor: figures not shown |
| 15346 | Basement: figures not shown; First floor: figures not shown |
| 15349 | Basement: figures not shown; First floor: figures not shown |
| 15351 | Basement: figures not shown |
| 15352 | Basement: figures not shown; First floor: figures not shown |
| 15353 | Basement: figures not shown |
| 15357 | Basement: figures not shown; First floor: figures not shown |
| 15359 | Basement: figures not shown; First floor: figures not shown |
| 15362 | Basement: figures not shown; First floor: figures not shown |
| 15364 | Basement: figures not shown |
| 15370 | Basement: average 6.9 pCi/L, 267 tests; First floor: figures not shown |
| 15377 | Basement: figures not shown; First floor: figures not shown |
| 15380 | Basement: 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.
Greene County, Geology
The ground under Greene County
PredictedMost of the ground under Greene County is one class on USGS's geologic map: 92.3% of its land is moderate radon potential, with 7.7% high. The map puts 92.0% of Greene County in the area it calls Permian Rocks of the Pittsburgh Low Plateau and 7.7% in Pennsylvanian Rocks of the Pittsburgh Low Plateau. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 14, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Permian Rocks of the Pittsburgh Low Plateau | Permian sandstone, shale, limestone, and coal. | Moderate | 11 | 92.0% |
| Pennsylvanian Rocks of the Pittsburgh Low Plateau | Pennsylvanian marine shale, siltstone, sandstone, limestone, and coal. | High | 14 | 7.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Greene County beside the ground around it
Pennsylvania as a whole has more high-potential ground than Greene County: 70.4% of its land, against 7.7% here. Of the 5 counties that border it, 2 have more high-potential ground, Fayette County the most at 44.2%.
The map rates the ground, not the air in any home.
Local help
Greene County, Local resources
Radon testing and mitigation in Greene 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
Greene County, Questions
Questions about radon in Greene County
Are radon levels high in Greene County?
In 2020, 20.0% of the radon tests reported to CDC for Greene County, Pennsylvania were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.2 pCi/L. Of 63 Pennsylvania counties with 30 or more tests for the same period, 58 reported a higher share; pooled, the state comes to 30.3%.
Which counties border Greene County?
Greene County borders 5 counties: Marshall County, WV, Washington County, PA, Monongalia County, WV, Fayette County, PA and Wetzel County, WV.
Products
Greene County, Products
Testing a home in Greene County
In Greene County, 20.0% of 45 tests reported to CDC in 2020 reached 4 pCi/L, against 30.3% pooled across Pennsylvania. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Greene 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
MonitorAranet
Radon One battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- 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
Greene County, Bordering counties
Counties bordering Greene County
Calculated by Radon411- Radon levels in Washington County, PAEPA zone 2
33.6%at or above 4 pCi/L
Median 2.8 pCi/L · 1,227 tests · 13.6 points above Greene County
- Radon levels in Fayette County, PAEPA zone 2
17.4%at or above 4 pCi/L
Median 1.8 pCi/L · 287 tests · 2.6 points below Greene County
- Radon levels in Marshall County, WVEPA zone 1
No CDC figure for 2020; its page reads it against its own neighbours.
- Radon levels in Monongalia County, WVEPA zone 1
No CDC figure for 2020; its page reads it against its own neighbours.
- Radon levels in Wetzel County, WVEPA zone 1
No CDC figure for 2020; its page reads it against its own neighbours.
Greene County, Cities and towns
Cities and towns in Greene County
Greene County has been losing residents: from 35,869 in 2020 to 33,885 on July 1, 2025, a fall of 5.5% by the Census Bureau's estimates. That works out to 59 people per square mile of land. No town dominates: Waynesburg, the largest, has 3,631 residents, 10.7% of the total. Together its 6 incorporated places hold 15.0% of those residents; the other 85.0% live outside any of them. Reported testing is thin here: 45 tests over 2020, or 1.3 for every 1,000 residents (2025 estimate), where Pennsylvania as a whole comes to 7.2.
From Waynesburg to Clarksville, CDC publishes no figure by town: each reads Greene County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Waynesburg | 3,631 | −9.0% | 10.7% |
| Carmichaels | 401 | −5.6% | 1.2% |
| Rices Landing | 392 | −6.7% | 1.2% |
| Greensboro | 248 | −6.8% | 0.7% |
| Jefferson | 239 | −5.9% | 0.7% |
| Clarksville | 183 | −6.2% | 0.5% |
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).
Greene County, Homes
Homes in Greene County
Of Greene County's 16,182 homes, 70% are detached houses, against 57% across Pennsylvania; 17% are mobile homes. Half of its homes were built before 1960, close to Pennsylvania's 1965: 50% date from before 1960 and 11% from 2000 or later. Owners live in 78% of the occupied homes (Pennsylvania: 69%), so for most households a test and a fix are their own to order.
| Homes | Greene County | Pennsylvania |
|---|---|---|
| Housing units | 16,182 | 5,779,663 |
| Detached houses | 70% | 57% |
| In buildings of 5 or more | 4% | 13% |
| Mobile homes | 17% | 4% |
| Built before 1960 | 50% | 45% |
| Built since 2000 | 11% | 14% |
| Middle year built | 1960 | 1965 |
| Owner-occupied | 78% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.