Out of 30 counties with wildfire data, these are the counties with the highest smoke exposure risk.
| Statistic | Value |
|---|---|
| Counties ranked | 30 |
| Avg smoke risk (top 100) | 34/100 |
| Total county fires 5yr (top 100) | 911 |
Top 30 Counties
| Rank | County | State | Smoke Risk | County Fires (5yr) | ZIP Codes |
|---|---|---|---|---|---|
| 1 | Washington | Utah | 59/100 | 77 | 22 |
| 2 | Atlantic | Utah | 53/100 | 4 | 1 |
| 3 | Salt Lake | Utah | 43/100 | 49 | 72 |
| 4 | Iron | Utah | 43/100 | 23 | 10 |
| 5 | Utah | Utah | 41/100 | 52 | 26 |
| 6 | Kane | Utah | 38/100 | 20 | 6 |
| 7 | Weber | Utah | 38/100 | 16 | 16 |
| 8 | Tooele | Utah | 37/100 | 140 | 8 |
| 9 | Wasatch | Utah | 37/100 | 14 | 3 |
| 10 | Juab | Utah | 36/100 | 10 | 5 |
| 11 | Box Elder | Utah | 35/100 | 49 | 20 |
| 12 | Millard | Utah | 34/100 | 24 | 10 |
| 13 | Davis | Utah | 33/100 | 16 | 14 |
| 14 | Summit | Utah | 33/100 | 14 | 9 |
| 15 | Sevier | Utah | 32/100 | 17 | 12 |
| 16 | Sanpete | Utah | 32/100 | 9 | 15 |
| 17 | Morgan | Utah | 32/100 | 6 | 2 |
| 18 | Grand | Utah | 31/100 | 65 | 2 |
| 19 | Piute | Utah | 30/100 | 3 | 6 |
| 20 | Garfield | Utah | 29/100 | 29 | 10 |
| 21 | Beaver | Utah | 29/100 | 24 | 4 |
| 22 | Carbon | Utah | 29/100 | 13 | 6 |
| 23 | Cache | Utah | 29/100 | 8 | 18 |
| 24 | Duchesne | Utah | 28/100 | 61 | 13 |
| 25 | Rich | Utah | 28/100 | 5 | 4 |
| 26 | Uintah | Utah | 27/100 | 61 | 8 |
| 27 | San Juan | Utah | 27/100 | 29 | 8 |
| 28 | Daggett | Utah | 26/100 | 7 | 2 |
| 29 | Emery | Utah | 22/100 | 65 | 9 |
| 30 | Wayne | Utah | 20/100 | 1 | 6 |
Methodology
County rankings for Utah 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.