Out of 67 counties with wildfire data, these are the counties with the highest smoke exposure risk.
| Statistic | Value |
|---|---|
| Counties ranked | 67 |
| Avg smoke risk (top 100) | 14/100 |
| Total county fires 5yr (top 100) | 197 |
Top 67 Counties
| Rank | County | State | Smoke Risk | County Fires (5yr) | ZIP Codes |
|---|---|---|---|---|---|
| 1 | Carbon | Pennsylvania | 23/100 | 5 | 20 |
| 2 | Monroe | Pennsylvania | 22/100 | 8 | 49 |
| 3 | Lehigh | Pennsylvania | 21/100 | 8 | 36 |
| 4 | Snyder | Pennsylvania | 21/100 | 1 | 16 |
| 5 | Berks | Pennsylvania | 20/100 | 1 | 58 |
| 6 | Union | Pennsylvania | 20/100 | 0 | 8 |
| 7 | Northampton | Pennsylvania | 19/100 | 8 | 21 |
| 8 | Philadelphia | Pennsylvania | 19/100 | 2 | 111 |
| 9 | Clearfield | Pennsylvania | 19/100 | 1 | 44 |
| 10 | Luzerne | Pennsylvania | 18/100 | 5 | 54 |
| 11 | Jefferson | Pennsylvania | 18/100 | 1 | 22 |
| 12 | Juniata | Pennsylvania | 18/100 | 1 | 10 |
| 13 | Delaware | Pennsylvania | 18/100 | 1 | 32 |
| 14 | Franklin | Pennsylvania | 17/100 | 9 | 30 |
| 15 | Chester | Pennsylvania | 17/100 | 5 | 90 |
| 16 | Pike | Pennsylvania | 17/100 | 5 | 12 |
| 17 | Cumberland | Pennsylvania | 17/100 | 3 | 20 |
| 18 | Centre | Pennsylvania | 17/100 | 2 | 33 |
| 19 | Lackawanna | Pennsylvania | 17/100 | 1 | 36 |
| 20 | Northumberland | Pennsylvania | 17/100 | 0 | 12 |
| 21 | Montour | Pennsylvania | 17/100 | 0 | 3 |
| 22 | Adams | Pennsylvania | 16/100 | 3 | 21 |
| 23 | Elk | Pennsylvania | 16/100 | 2 | 16 |
| 24 | Perry | Pennsylvania | 16/100 | 2 | 13 |
| 25 | Schuylkill | Pennsylvania | 16/100 | 2 | 62 |
| 26 | Bucks | Pennsylvania | 16/100 | 2 | 70 |
| 27 | Montgomery | Pennsylvania | 16/100 | 2 | 53 |
| 28 | Forest | Pennsylvania | 16/100 | 0 | 1 |
| 29 | Blair | Pennsylvania | 16/100 | 0 | 16 |
| 30 | Lebanon | Pennsylvania | 16/100 | 0 | 15 |
| 31 | Lancaster | Pennsylvania | 15/100 | 1 | 61 |
| 32 | Clarion | Pennsylvania | 15/100 | 0 | 41 |
| 33 | Huntingdon | Pennsylvania | 14/100 | 9 | 27 |
| 34 | Wyoming | Pennsylvania | 14/100 | 8 | 18 |
| 35 | Mifflin | Pennsylvania | 14/100 | 1 | 11 |
| 36 | Dauphin | Pennsylvania | 13/100 | 2 | 40 |
| 37 | Cambria | Pennsylvania | 13/100 | 1 | 60 |
| 38 | Clinton | Pennsylvania | 13/100 | 1 | 18 |
| 39 | Columbia | Pennsylvania | 13/100 | 1 | 12 |
| 40 | Lycoming | Pennsylvania | 13/100 | 1 | 20 |
| 41 | Bedford | Pennsylvania | 12/100 | 22 | 27 |
| 42 | Fulton | Pennsylvania | 12/100 | 22 | 11 |
| 43 | Warren | Pennsylvania | 12/100 | 5 | 18 |
| 44 | Wayne | Pennsylvania | 12/100 | 2 | 33 |
| 45 | York | Pennsylvania | 12/100 | 2 | 44 |
| 46 | Venango | Pennsylvania | 12/100 | 0 | 10 |
| 47 | Susquehanna | Pennsylvania | 12/100 | 0 | 30 |
| 48 | Indiana | Pennsylvania | 11/100 | 1 | 29 |
| 49 | McKean | Pennsylvania | 11/100 | 1 | 18 |
| 50 | Armstrong | Pennsylvania | 11/100 | 0 | 37 |
| 51 | Cameron | Pennsylvania | 11/100 | 0 | 3 |
| 52 | Sullivan | Pennsylvania | 11/100 | 0 | 9 |
| 53 | Bradford | Pennsylvania | 10/100 | 2 | 33 |
| 54 | Somerset | Pennsylvania | 9/100 | 22 | 39 |
| 55 | Crawford | Pennsylvania | 9/100 | 5 | 25 |
| 56 | Butler | Pennsylvania | 9/100 | 1 | 45 |
| 57 | Tioga | Pennsylvania | 9/100 | 1 | 21 |
| 58 | Mercer | Pennsylvania | 8/100 | 0 | 17 |
| 59 | Potter | Pennsylvania | 8/100 | 0 | 11 |
| 60 | Erie | Pennsylvania | 7/100 | 5 | 50 |
| 61 | Westmoreland | Pennsylvania | 7/100 | 0 | 23 |
| 62 | Beaver | Pennsylvania | 6/100 | 1 | 22 |
| 63 | Fayette | Pennsylvania | 6/100 | 0 | 77 |
| 64 | Allegheny | Pennsylvania | 5/100 | 0 | 182 |
| 65 | Washington | Pennsylvania | 5/100 | 0 | 38 |
| 66 | Greene | Pennsylvania | 5/100 | 0 | 15 |
| 67 | Lawrence | Pennsylvania | 5/100 | 0 | 25 |
Methodology
County rankings for Pennsylvania based on average smoke risk score and fire frequency.
Data sources: National Interagency Fire Center (NIFC), EPA AirNow. Last updated: 2026-06-04.
Frequently Asked Questions
How is wildfire smoke risk calculated?
Smoke risk scores (0-100) combine multiple factors: proximity to recent wildfires, county fire frequency over the past 5 years, historical smoke days, and geographic position relative to typical fire corridors. Higher scores indicate greater smoke exposure risk during fire season.
How can I protect myself from wildfire smoke?
Use a HEPA air purifier indoors, wear N95 or KN95 masks outdoors during smoke events, seal windows and doors, and monitor AirNow.gov for real-time air quality. Create a clean room in your home with the purifier running and windows sealed.