Radon Testing & Mitigation in Lackawanna County, PA
28% of 36,624 basement radon tests reported to PA DEP in Lackawanna County measured 4.0 pCi/L or higher, EPA's action level (median 2.3 pCi/L).
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Radon in Lackawanna County: 28% of the 36,624 basement tests reported to PA DEP measured 4.0 pCi/L or higher, EPA's action level, 9 points below the 37% statewide share. The county ranks 64th highest of 67, and the median result is 2.3 pCi/L. Only a test shows one home's level.
Radon Test Results by ZIP Code in Lackawanna County
30 ZIP codes in Lackawanna County have at least 20 basement tests on record. Among those with 100 or more, the highest share at or above 4.0 pCi/L is in 18433 (Jermyn): 42% of 1,137 tests. The lowest is in 18503 (Scranton): 11% of 107 tests.
| ZIP code | Post office | Basement tests | Median pCi/L | At or above 4.0 |
|---|---|---|---|---|
| 18411 | Clarks Summit | 8,877 | 2.8 | 34% |
| 18505 | Scranton | 3,272 | 2.0 | 23% |
| 18504 | Scranton | 2,283 | 1.8 | 20% |
| 18512 | Dunmore | 2,270 | 2.0 | 24% |
| 18444 | Moscow | 2,189 | 2.7 | 35% |
| 18518 | Old Forge | 1,496 | 2.6 | 33% |
| 18447 | Olyphant | 1,480 | 2.4 | 31% |
| 18509 | Scranton | 1,416 | 1.8 | 14% |
| 18403 | Archbald | 1,373 | 2.0 | 20% |
| 18407 | Carbondale | 1,318 | 2.0 | 23% |
| 18507 | Moosic | 1,210 | 2.4 | 30% |
| 18510 | Scranton | 1,192 | 1.5 | 13% |
| 18433 | Jermyn | 1,137 | 3.2 | 42% |
| 18452 | Blakely | 1,035 | 2.5 | 31% |
| 18414 | Dalton | 1,018 | 2.8 | 32% |
Show all 30 ZIP codes
| 18519 | Dickson City | 915 | 2.3 | 26% |
| 18508 | Scranton | 912 | 2.1 | 23% |
| 18434 | Jessup | 699 | 2.2 | 28% |
| 18517 | Taylor | 583 | 2.2 | 23% |
| 18471 | Waverly | 488 | 2.7 | 27% |
| 18424 | Gouldsboro | 446 | 3.1 | 40% |
| 18436 | Lake Ariel (part) | 422 | 2.6 | 34% |
| 18503 | Scranton | 107 | 0.7 | 11% |
| 18501 | Scranton | 104 | 1.7 | 15% |
| 18421 | Forest City (part) | 95 | 1.8 | 23% |
| 18416 | Elmhurst | 56 | 3.1 | 38% |
| 18419 | Factoryville (part) | 54 | 3.4 | 43% |
| 18420 | Fleetville | 43 | 2.8 | 35% |
| 18410 | Chinchilla | 39 | 2.5 | 26% |
| 18440 | La Plume | 20 | 3.0 | 25% |
| Lackawanna County | 36,624 | 2.3 | 28% | |
| Pennsylvania | 2,629,492 | 2.8 | 37% | |
See your ZIP in the table?
Get matched with a DEP-certified radon professionalFirst-floor tests in Lackawanna County: 4,744 on record, median 0.9 pCi/L, 9% at or above 4.0 pCi/L.
EPA's Map of Radon Zones (1993) places Lackawanna County in Zone 1, its highest category (predicted average indoor screening level above 4 pCi/L). The map is a county-wide prediction; the figures in this table are measurements.
Figures count tests, not homes. A home tested more than once is counted each time, and tests run after a mitigation system was installed are included because the dataset does not separate them. ZIP codes with fewer than 20 basement tests are not shown.
Housing Age in Lackawanna County
76% of Lackawanna County's 100,177 housing units were built before 1980, 9 points above the 67% statewide figure; 36% date from before 1940. Those homes predate EPA's 1994 model standards for radon-resistant construction. Age does not predict a test result: EPA's guidance is that any home, new or old, may have a radon problem.
Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B25034. Counts all housing units, including vacant and seasonal ones. Retrieved September 29, 2026.
Bedrock Under Lackawanna County
Catskill Formation, including its mapped members (Devonian; sandstone, shale and siltstone) underlies 71% of the county. Llewellyn Formation (Pennsylvanian; sandstone) underlies 15% of the county.
Mapped bedrock describes an area. The USGS states that its radon assessment cannot be applied to individual homes. More on Pennsylvania radon and geology.
Sources: U.S. Geological Survey State Geologic Map Compilation, from Pennsylvania Geological Survey Map 1 (1980; digital edition 2001). Retrieved September 29, 2026. U.S. Geological Survey Open-File Report 93-292-C, Geologic Radon Potential of EPA Region 3 (1993).
Home Purchases in Lackawanna County
Lenders reported 2,053 home-purchase mortgages originated in Lackawanna County in 2024. The count covers financed purchases only; cash purchases are not in the data. See radon in a Pennsylvania home sale.
Source: FFIEC Home Mortgage Disclosure Act data, 2024. Retrieved September 29, 2026.
Municipalities in Lackawanna County
Lackawanna County has 40 municipalities: 2 cities, 17 boroughs and 21 townships.
Show all 40 municipalities
Archbald borough, Benton township, Blakely borough, Carbondale city, Carbondale township, Clarks Green borough, Clarks Summit borough, Clifton township, Covington township, Dalton borough, Dickson City borough, Dunmore borough, Elmhurst township, Fell township, Glenburn township, Greenfield township, Jefferson township, Jermyn borough, Jessup borough, La Plume township, Madison township, Mayfield borough, Moosic borough, Moscow borough, Newton township, North Abington township, Old Forge borough, Olyphant borough, Ransom township, Roaring Brook township, Scott township, Scranton city, South Abington township, Spring Brook township, Taylor borough, Thornhurst township, Throop borough, Vandling borough, Waverly township, West Abington township.
Source: U.S. Census Bureau, 2025 Gazetteer Files, county subdivisions. Retrieved September 29, 2026.
City Pages in Lackawanna County
Neighboring Counties
- Radon in Luzerne County → 31% of 54,988 basement tests at or above 4.0 pCi/L
- Radon in Monroe County → 47% of 39,716 basement tests at or above 4.0 pCi/L
- Radon in Susquehanna County → 41% of 3,716 basement tests at or above 4.0 pCi/L
- Radon in Wayne County → 29% of 14,466 basement tests at or above 4.0 pCi/L
- Radon in Wyoming County → 43% of 4,060 basement tests at or above 4.0 pCi/L
- All 67 Pennsylvania county radon pages
DEP-Certified Mitigation Firms Based in County
4 DEP-certified mitigation firms are physically based in Lackawanna County. Firms from adjacent counties routinely serve here as well.
Source: PA DEP Certified Mitigation Firms Directory, July 2026. This reflects business address only — firms based elsewhere may also serve Lackawanna County.
Testing, Cost and Certification
Short-term tests run 48–96 hours; long-term tests run 90 days or more. At 4.0 pCi/L or higher, retest or mitigate. How radon testing works in a Pennsylvania real estate transaction.
Mitigation in Lackawanna County typically costs $875–$2,250. Pennsylvania radon mitigation cost guide.
Anyone testing or mitigating for pay must hold DEP certification under 25 Pa. Code § 240. How to verify a contractor in the PA DEP Radon Services Directory.
Frequently Asked Questions
What share of radon tests in Lackawanna County are at or above the EPA action level?
28% of the 36,624 basement tests reported to PA DEP from Lackawanna County measured 4.0 pCi/L or higher, against 37% statewide. The median result is 2.3 pCi/L, and 2% of tests measured 20 pCi/L or higher.
Which Lackawanna County ZIP code has the highest radon test results?
Among ZIP codes with at least 100 basement tests, 18433 (Jermyn) has the highest share at or above 4.0 pCi/L: 42% of 1,137 tests, with a median of 3.2 pCi/L. 18503 (Scranton) has the lowest, at 11%.
How does Lackawanna County compare with other Pennsylvania counties?
Lackawanna County ranks 64th highest of 67 counties by share of basement tests at or above 4.0 pCi/L, at 28%. Among its neighbors, Monroe County has the highest share at 47% and Wayne County the lowest at 29%.
What bedrock is under Lackawanna County?
The largest mapped units are Catskill Formation (71% of the county) and Llewellyn Formation (15% of the county), according to the USGS compilation of the Pennsylvania Geological Survey state map.