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 Monroe County, Pennsylvania
EPA puts Monroe County in Zone 1, its highest radon zone, and 30.7% of its 1,649 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
30.7%
0.4 pts above PA
- Monroe
- 30.7%
- PA
- 30.3%
1,649 tests, 2020
Median result
2.1pCi/L
Below action level
- Monroe
- 2.1 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2020
Tests reported
1,649
14th of 63 by tests
- Monroe
- 1,649
- 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
48 of 63
Lowest quarter
- Monroe
- 30.7%
- Perry
- 57.7%
By share, of 63 with 30+ tests
Read a result for Monroe County
Starts at Monroe County's median, 2.1 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.1 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. Monroe County's median reported result, 2020.
The data
Monroe County, At a glance
Monroe County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Monroe County in
USGS geologic potential: Moderate across 68% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Monroe County, 2020
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 35.9% |
| 2015 | 44.8% |
| 2016 | 37.8% |
| 2017 | 40.0% |
| 2018 | 31.3% |
| 2019 | 36.1% |
| 2020 | 30.7% |
2020: 30.7%. Across these years the share ran from 30.7% to 44.8%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 1,649 tests reported to CDC for Monroe 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).
Monroe County, Compared
Monroe County radon figures, compared
Calculated by Radon411In Monroe County, about 3 in 10 reported tests in 2020 (506 of 1,649) were at or above EPA's action level. Against the national pool of 25.5%, the gap is 5.2 points higher. Across 67 Pennsylvania counties pooled together, 30.3% of tests reached that level, so Monroe County runs 0.4 points above its state.
Of 8 neighbours with a figure, 2 reported a larger share at or above 4 pCi/L and 5 a smaller one; the spread is 24.3% (Sussex County, NJ) to 41.3% (Northampton County). By share, Monroe County is 48th of 63 Pennsylvania counties with 30 or more tests for the same period.
Year by year, 2014 opened at 35.9% and 2020 closed at 30.7% (down 5.2 points), with 2015 the high at 44.8%. Half the tests came in under 2.1 pCi/L and half over it; the single highest reached 151.1 pCi/L. Below the action level, 798 tests (48.4%) came in under 2 pCi/L, against 44.3% statewide, and 345 tests (20.9%) fell between 2 and 4, against 25.4% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 30.7% share point the same way here. USGS geology rates 68% of the county's land moderate radon potential.
The busiest year on file was 2020, with 1,649 tests reported; the quietest, 2014, had 881.
Monroe CountyPennsylvania, pooled
| Year | Tests | Monroe County, at or above 4 pCi/L | Pennsylvania, pooled |
|---|---|---|---|
| 2014 | 881 | 35.9% | 36.1% |
| 2015 | 1,103 | 44.8% | 37.8% |
| 2016 | 1,258 | 37.8% | 34.4% |
| 2017 | 1,306 | 40.0% | 35.1% |
| 2018 | 1,177 | 31.3% | 30.5% |
| 2019 | 1,245 | 36.1% | 31.4% |
| 2020 | 1,649 | 30.7% | 30.3% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Monroe County, State data
Pennsylvania's own radon test data
MeasuredWhat Pennsylvania's own agencies publish about radon tests in Monroe 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 Monroe County
Pennsylvania DEP publishes its figures by ZIP code, not by county. These are the 35 ZIP codes that lie wholly or partly in Monroe County, each with the state's own figures for it. Period: Period not stated by DEP.
| ZIP code | What the state reports |
|---|---|
| 18058 | Basement: average 18.1 pCi/L, 1,466 tests; First floor: average 9.3 pCi/L, 242 tests |
| 18071 | Basement: average 17.4 pCi/L, 984 tests; First floor: average 10.9 pCi/L, 107 tests |
| 18210 | Basement: average 6.9 pCi/L, 1,295 tests; First floor: average 2.4 pCi/L, 705 tests |
| 18301 | Basement: average 5.9 pCi/L, 5,817 tests; First floor: average 2.8 pCi/L, 1,280 tests |
| 18302 | Basement: average 5.5 pCi/L, 1,764 tests; First floor: average 2.7 pCi/L, 292 tests |
| 18321 | Basement: average 5.7 pCi/L, 444 tests; First floor: average 3.6 pCi/L, 105 tests |
| 18322 | Basement: average 19.3 pCi/L, 764 tests; First floor: average 8.0 pCi/L, 80 tests |
| 18323 | Basement: average 3.8 pCi/L, 214 tests; First floor: average 2.5 pCi/L, 59 tests |
| 18324 | Basement: average 5.8 pCi/L, 2,291 tests; First floor: average 2.4 pCi/L, 979 tests |
| 18325 | Basement: average 4.2 pCi/L, 432 tests; First floor: average 1.8 pCi/L, 128 tests |
| 18326 | Basement: average 5.0 pCi/L, 667 tests; First floor: average 2.4 pCi/L, 170 tests |
| 18327 | Basement: average 11.9 pCi/L, 87 tests; First floor: figures not shown |
| 18330 | Basement: average 14.0 pCi/L, 2,143 tests; First floor: average 6.0 pCi/L, 381 tests |
| 18331 | Basement: average 15.4 pCi/L, 167 tests; First floor: figures not shown |
| 18332 | Basement: average 5.7 pCi/L, 400 tests; First floor: average 2.4 pCi/L, 114 tests |
| 18333 | Basement: average 17.6 pCi/L, 228 tests; First floor: average 12.2 pCi/L, 36 tests |
| 18334 | Basement: average 4.1 pCi/L, 738 tests; First floor: average 1.7 pCi/L, 246 tests |
| 18335 | Basement: average 5.5 pCi/L, 217 tests; First floor: average 2.4 pCi/L, 101 tests |
| 18342 | Basement: average 4.1 pCi/L, 103 tests; First floor: average 1.7 pCi/L, 36 tests |
| 18344 | Basement: average 6.6 pCi/L, 610 tests; First floor: average 3.0 pCi/L, 170 tests |
| 18346 | Basement: average 3.8 pCi/L, 328 tests; First floor: average 1.4 pCi/L, 208 tests |
| 18347 | Basement: average 3.6 pCi/L, 867 tests; First floor: average 1.8 pCi/L, 674 tests |
| 18349 | Basement: average 3.6 pCi/L, 52 tests; First floor: figures not shown |
| 18350 | Basement: average 3.2 pCi/L, 558 tests; First floor: average 1.7 pCi/L, 532 tests |
| 18353 | Basement: average 14.9 pCi/L, 2,203 tests; First floor: average 8.5 pCi/L, 283 tests |
| 18354 | Basement: average 10.2 pCi/L, 225 tests; First floor: average 3.3 pCi/L, 31 tests |
| 18355 | Basement: average 5.2 pCi/L, 253 tests; First floor: average 2.6 pCi/L, 48 tests |
| 18356 | Basement: average 6.2 pCi/L, 58 tests; First floor: figures not shown |
| 18357 | Basement: average 3.3 pCi/L, 57 tests; First floor: figures not shown |
| 18360 | Basement: average 7.6 pCi/L, 6,030 tests; First floor: average 3.3 pCi/L, 959 tests |
| 18370 | Basement: average 7.6 pCi/L, 286 tests; First floor: average 3.3 pCi/L, 61 tests |
| 18372 | Basement: average 5.6 pCi/L, 1,067 tests; First floor: average 3.1 pCi/L, 218 tests |
| 18424 | Basement: average 4.7 pCi/L, 884 tests; First floor: average 2.1 pCi/L, 317 tests |
| 18466 | Basement: average 4.0 pCi/L, 1,760 tests; First floor: average 1.9 pCi/L, 1,159 tests |
| 18610 | Basement: average 7.1 pCi/L, 784 tests; First floor: average 2.4 pCi/L, 332 tests |
- 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.
Monroe County, Geology
The ground under Monroe County
PredictedUSGS's geologic map splits Monroe County: 67.7% of its land is moderate radon potential and 32.3% high. The map puts 67.6% of Monroe County in the area it calls Glaciated Low Plateau East and Pocono Plateau and 32.3% in Appalachian Mountain Section. USGS gives the first a radon index of 10, in the moderate band (9 to 11), and the second 12, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Glaciated Low Plateau East and Pocono Plateau | Moderately thick glacial till overlying sandstone, siltstone, mudstone, and shale. | Moderate | 10 | 67.6% |
| Appalachian Mountain Section | Paleozoic sandstone, shale, and limestone. | High | 12 | 32.3% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Monroe County beside the ground around it
Pennsylvania as a whole has more high-potential ground than Monroe County: 70.4% of its land, against 32.3% here. Of the 8 counties that border it, 6 have more high-potential ground, Northampton County the most at 99.8%.
The map rates the ground, not the air in any home.
Local help
Monroe County, Local resources
Radon testing and mitigation in Monroe 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
Monroe County, Questions
Questions about radon in Monroe County
Are radon levels high in Monroe County?
In 2020, 30.7% of the radon tests reported to CDC for Monroe County, Pennsylvania were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.1 pCi/L. Of 63 Pennsylvania counties with 30 or more tests for the same period, 47 reported a higher share; pooled, the state comes to 30.3%.
Which counties border Monroe County?
Monroe County borders 8 counties: Northampton County, PA, Warren County, NJ, Carbon County, PA, Pike County, PA, Sussex County, NJ, Lackawanna County, PA, Luzerne County, PA and Wayne County, PA.
Products
Monroe County, Products
Testing a home in Monroe County
In Monroe County, 30.7% of 1,649 tests reported to CDC in 2020 reached 4 pCi/L, against 30.3% pooled across Pennsylvania. In Zone 1 the year-round level in Monroe 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-3786 rechargeable radon monitor with a 3.5-inch color screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Ion chamber
First reading: Within 10 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
Monroe County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Monroe County
Explore
Monroe County, Bordering counties
Counties bordering Monroe County
Calculated by Radon411- Radon levels in Northampton County, PAEPA zone 1
41.3%at or above 4 pCi/L
Median 2.9 pCi/L · 3,434 tests · 10.6 points above Monroe County
- Radon levels in Carbon County, PAEPA zone 1
40.6%at or above 4 pCi/L
Median 3.0 pCi/L · 438 tests · 9.9 points above Monroe County
- Radon levels in Pike County, PAEPA zone 2
30.7%at or above 4 pCi/L
Median 2.2 pCi/L · 1,158 tests · 0.0 points above Monroe County
- Radon levels in Wayne County, PAEPA zone 2
30.1%at or above 4 pCi/L
Median 2.3 pCi/L · 607 tests · 0.6 points below Monroe County
- Radon levels in Luzerne County, PAEPA zone 1
28.2%at or above 4 pCi/L
Median 2.0 pCi/L · 991 tests · 2.5 points below Monroe County
- Radon levels in Warren County, NJEPA zone 1
28.1%at or above 4 pCi/L
Median 1.9 pCi/L · 3,473 tests · 2.6 points below Monroe County
- Radon levels in Lackawanna County, PAEPA zone 1
27.1%at or above 4 pCi/L
Median 2.1 pCi/L · 776 tests · 3.6 points below Monroe County
- Radon levels in Sussex County, NJEPA zone 1
24.3%at or above 4 pCi/L
Median 1.8 pCi/L · 5,763 tests · 6.4 points below Monroe County
Monroe County, Cities and towns
Cities and towns in Monroe County
About 167,179 people live in Monroe County by the Census Bureau's estimate for July 1, 2025, 1,131 fewer than in 2020 (−0.7%). That works out to 275 people per square mile of land. No town dominates: East Stroudsburg, the largest, has 9,438 residents, 5.6% of the total. Together its 4 incorporated places hold 11.3% of those residents; the other 88.7% live outside any of them. CDC's 1,649 reported tests for 2020 work out to 9.9 per 1,000 residents (2025 estimate), close to Pennsylvania's 7.2.
From East Stroudsburg to Delaware Water Gap, CDC publishes no figure by town: each reads Monroe County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| East Stroudsburg | 9,438 | −2.4% | 5.6% |
| Stroudsburg | 5,809 | −2.1% | 3.5% |
| Mount Pocono | 3,047 | −1.4% | 1.8% |
| Delaware Water Gap | 669 | −1.8% | 0.4% |
Places in Monroe County with a city page: 1 of 1
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).
Monroe County, Homes
Homes in Monroe County
Monroe County is a place of houses on their own lots: 82% of its 79,458 homes are detached single-family houses, against 57% across Pennsylvania. Much of Monroe County is recent building: 20% of its homes have gone up since 2000 and the middle year built is 1984, against 1965 for Pennsylvania. Owners live in 80% of the occupied homes (Pennsylvania: 69%), so for most households a test and a fix are their own to order.
| Homes | Monroe County | Pennsylvania |
|---|---|---|
| Housing units | 79,458 | 5,779,663 |
| Detached houses | 82% | 57% |
| In buildings of 5 or more | 4% | 13% |
| Mobile homes | 3% | 4% |
| Built before 1960 | 17% | 45% |
| Built since 2000 | 20% | 14% |
| Middle year built | 1984 | 1965 |
| Owner-occupied | 80% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.