Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
Locations and reports
Radon Levels in Clinton County, Pennsylvania
EPA puts Clinton County in Zone 1, its highest radon zone, and high results are common there: 54.1% of the 133 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
54.1%
23.8 pts above PA
- Clinton
- 54.1%
- PA
- 30.3%
133 tests, 2020
Median result
4.5pCi/L
Action level reached
- Clinton
- 4.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2020
Tests reported
133
49th of 63 by tests
- Clinton
- 133
- 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
3 of 63
Top quarter
- Clinton
- 54.1%
- Perry
- 57.7%
By share, of 63 with 30+ tests
Read a result for Clinton County
Starts at Clinton County's median, 4.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 4.5 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. Clinton County's median reported result, 2020.
The data
Clinton County, At a glance
Clinton County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Clinton County in
USGS geologic potential: High across 99% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Clinton County, 2020
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 36.9% |
| 2015 | 42.9% |
| 2016 | 34.2% |
| 2017 | 44.4% |
| 2018 | 39.3% |
| 2019 | 37.5% |
| 2020 | 54.1% |
2020: 54.1%. Across these years the share ran from 34.2% to 54.1%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 133 tests reported to CDC for Clinton 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).
Clinton County, Compared
Clinton County radon figures, compared
Calculated by Radon411More than half: 54.1% of the 133 radon tests reported to CDC for Clinton County in 2020 read at least 4 pCi/L. That places it 3rd of 63 Pennsylvania counties with 30 or more tests for the same period. That is 23.8 points above the 30.3% pooled from 67 Pennsylvania counties.
The median result, 4.5 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 407.0 pCi/L. The rest split 29.3% under 2 pCi/L and 16.5% from 2 to 4 (Pennsylvania: 44.3% and 25.4%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 54.1% share point the same way here.
No bordering county with a figure for the same period reported a higher share; the closest is Clearfield County at 47.5%, the lowest Potter County at 17.9%. Statewide for the same period, Perry County reported the highest share (57.7%) and Philadelphia County the lowest (10.6%).
The busiest year on file was 2019, with 352 tests reported; the quietest, 2020, had 133.
Over 7 years of annual figures the share rose 17.2 points, from 36.9% in 2014 to 54.1% in 2020; its peak was 54.1% in 2020. Nationally, every county with a figure for the same period pools to 25.5%; Clinton County sits 28.6 points above it.
Clinton CountyPennsylvania, pooled
54.1% % of tests30.3% % of tests
| Year | Tests | Clinton County, at or above 4 pCi/L | Pennsylvania, pooled |
|---|---|---|---|
| 2014 | 203 | 36.9% | 36.1% |
| 2015 | 240 | 42.9% | 37.8% |
| 2016 | 234 | 34.2% | 34.4% |
| 2017 | 198 | 44.4% | 35.1% |
| 2018 | 173 | 39.3% | 30.5% |
| 2019 | 352 | 37.5% | 31.4% |
| 2020 | 133 | 54.1% | 30.3% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Clinton County, State data
Pennsylvania's own radon test data
MeasuredWhat Pennsylvania's own agencies publish about radon tests in Clinton 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 Clinton County
Pennsylvania DEP publishes its figures by ZIP code, not by county. These are the 15 ZIP codes that lie wholly or partly in Clinton County, each with the state's own figures for it. Period: Period not stated by DEP.
| ZIP code | What the state reports |
|---|---|
| 16822 | Basement: average 8.2 pCi/L, 164 tests; First floor: average 2.0 pCi/L, 37 tests |
| 16841 | Basement: average 13.3 pCi/L, 442 tests; First floor: average 3.4 pCi/L, 64 tests |
| 16848 | Basement: figures not shown; First floor: figures not shown |
| 17721 | Basement: average 3.6 pCi/L, 114 tests; First floor: figures not shown |
| 17729 | Basement: figures not shown; First floor: figures not shown |
| 17740 | Basement: average 12.0 pCi/L, 976 tests; First floor: average 3.4 pCi/L, 198 tests |
| 17745 | Basement: average 9.3 pCi/L, 2,405 tests; First floor: average 3.8 pCi/L, 356 tests |
| 17747 | Basement: average 8.8 pCi/L, 166 tests; First floor: figures not shown |
| 17748 | Basement: average 6.9 pCi/L, 74 tests; First floor: figures not shown |
| 17750 | Basement: figures not shown |
| 17751 | Basement: average 9.0 pCi/L, 840 tests; First floor: average 3.1 pCi/L, 128 tests |
| 17760 | Basement: average 20.6 pCi/L, 34 tests; First floor: figures not shown |
| 17764 | Basement: average 6.1 pCi/L, 100 tests; First floor: figures not shown |
| 17778 | Basement: figures not shown |
| 17779 | Basement: average 9.6 pCi/L, 148 tests; 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.
Clinton County, Geology
The ground under Clinton County
PredictedMost of the ground under Clinton County is one class on USGS's geologic map: 99.2% of its land is high radon potential, with 0.8% moderate. The map puts 49.0% of Clinton County in the area it calls Mountainous High Plateau and 30.8% in Appalachian Mountain Section, with 2 smaller areas beside them. USGS gives both a radon index of 12, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Mountainous High Plateau | Sandstone, shale and conglomerate. | High | 12 | 49.0% |
| Appalachian Mountain Section | Paleozoic sandstone, shale, and limestone. | High | 12 | 30.8% |
| Pennsylvanian Rocks of the Pittsburgh Low Plateau | Pennsylvanian marine shale, siltstone, sandstone, limestone, and coal. | High | 14 | 19.4% |
| Allegheny Mountain Section | Pennsylvanian sandstone, siltstone, shale, limestone, coal. | Moderate | 11 | 0.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Clinton County beside the ground around it
Clinton County has more high-potential ground than Pennsylvania as a whole: 99.2% of its land against 70.4%. Of the 6 counties that border it, 2 have more high-potential ground, Union County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Clinton County, Local resources
Radon testing and mitigation in Clinton 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
Clinton County, Questions
Questions about radon in Clinton County
Are radon levels high in Clinton County?
In 2020, 54.1% of the radon tests reported to CDC for Clinton County, Pennsylvania were at or above 4 pCi/L, and the median reported pre-mitigation result was 4.5 pCi/L. Of 63 Pennsylvania counties with 30 or more tests for the same period, 2 reported a higher share; pooled, the state comes to 30.3%.
Which counties border Clinton County?
Clinton County borders 6 counties: Centre County, Lycoming County, Cameron County, Union County, Potter County and Clearfield County.
Products
Clinton County, Products
Testing a home in Clinton County
In Clinton County, 54.1% of 133 tests reported to CDC in 2020 reached 4 pCi/L, against 30.3% pooled across Pennsylvania. In Zone 1 the year-round level in Clinton 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
MonitorINKBIRD
INK-RD3 battery radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Screen
First reading: Within 24 hours
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
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Clinton County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Clinton County
Explore
Clinton County, Bordering counties
Counties bordering Clinton County
Calculated by Radon411- Radon levels in Cameron CountyEPA zone 1
75.0%at or above 4 pCi/L
Median 4.8 pCi/L · 4 tests · 20.9 points above Clinton County
- Radon levels in Clearfield CountyEPA zone 1
47.5%at or above 4 pCi/L
Median 3.6 pCi/L · 394 tests · 6.6 points below Clinton County
- Radon levels in Lycoming CountyEPA zone 1
45.2%at or above 4 pCi/L
Median 3.5 pCi/L · 562 tests · 8.9 points below Clinton County
- Radon levels in Union CountyEPA zone 1
44.5%at or above 4 pCi/L
Median 3.3 pCi/L · 182 tests · 9.6 points below Clinton County
- Radon levels in Centre CountyEPA zone 1
39.3%at or above 4 pCi/L
Median 2.3 pCi/L · 670 tests · 14.8 points below Clinton County
- Radon levels in Potter CountyEPA zone 2
17.9%at or above 4 pCi/L
Median 1.1 pCi/L · 195 tests · 36.2 points below Clinton County
Clinton County, Cities and towns
Cities and towns in Clinton County
The Census Bureau estimates 37,870 residents in Clinton County for July 1, 2025, 489 more than in 2020 (+1.3%). That works out to 43 people per square mile of land. Its largest town, Lock Haven, has 8,500 residents, 22.4% of the total. Together its 8 incorporated places hold 40.4% of those residents; the other 59.6% live outside any of them. Reported testing is thin here: 133 tests over 2020, or 3.5 for every 1,000 residents (2025 estimate), where Pennsylvania as a whole comes to 7.2.
From Lock Haven to South Renovo, CDC publishes no figure by town: each reads Clinton County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Lock Haven | 8,500 | +5.0% | 22.4% |
| Avis | 1,461 | −0.5% | 3.9% |
| Mill Hall | 1,456 | −0.9% | 3.8% |
| Flemington | 1,256 | −0.6% | 3.3% |
| Renovo | 1,044 | −1.0% | 2.8% |
| Beech Creek | 732 | −0.8% | 1.9% |
| Loganton | 466 | Level | 1.2% |
| South Renovo | 403 | −0.7% | 1.1% |
8 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).
Clinton County, Homes
Homes in Clinton County
Of Clinton County's 18,640 homes, 70% are detached houses, against 57% across Pennsylvania; 8% are mobile homes. Half of its homes were built before 1968, close to Pennsylvania's 1965: 41% date from before 1960 and 13% from 2000 or later. 72% 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 | Clinton County | Pennsylvania |
|---|---|---|
| Housing units | 18,640 | 5,779,663 |
| Detached houses | 70% | 57% |
| In buildings of 5 or more | 7% | 13% |
| Mobile homes | 8% | 4% |
| Built before 1960 | 41% | 45% |
| Built since 2000 | 13% | 14% |
| Middle year built | 1968 | 1965 |
| Owner-occupied | 72% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.