Out of 43 counties with wildfire data, these are the counties with the highest smoke exposure risk.
| Statistic | Value |
|---|---|
| Counties ranked | 43 |
| Avg smoke risk (top 100) | 37/100 |
| Total county fires 5yr (top 100) | 2,192 |
Top 43 Counties
| Rank | County | State | Smoke Risk | County Fires (5yr) | ZIP Codes |
|---|---|---|---|---|---|
| 1 | Valley | Idaho | 51/100 | 182 | 5 |
| 2 | Idaho | Idaho | 49/100 | 182 | 13 |
| 3 | Adams | Idaho | 48/100 | 37 | 5 |
| 4 | Boise | Idaho | 47/100 | 44 | 8 |
| 5 | Bannock | Idaho | 46/100 | 37 | 11 |
| 6 | Elmore | Idaho | 45/100 | 100 | 7 |
| 7 | Gem | Idaho | 45/100 | 22 | 2 |
| 8 | Ada | Idaho | 44/100 | 165 | 38 |
| 9 | Owyhee | Idaho | 44/100 | 90 | 5 |
| 10 | Twin Falls | Idaho | 42/100 | 72 | 9 |
| 11 | Lemhi | Idaho | 42/100 | 23 | 9 |
| 12 | Blaine | Idaho | 41/100 | 44 | 7 |
| 13 | Washington | Idaho | 41/100 | 19 | 3 |
| 14 | Gooding | Idaho | 40/100 | 35 | 4 |
| 15 | Lincoln | Idaho | 40/100 | 29 | 3 |
| 16 | Canyon | Idaho | 39/100 | 165 | 16 |
| 17 | Cassia | Idaho | 39/100 | 106 | 6 |
| 18 | Power | Idaho | 39/100 | 30 | 4 |
| 19 | Jerome | Idaho | 38/100 | 38 | 3 |
| 20 | Payette | Idaho | 38/100 | 15 | 3 |
| 21 | Clearwater | Idaho | 37/100 | 99 | 5 |
| 22 | Bonner | Idaho | 37/100 | 90 | 15 |
| 23 | Camas | Idaho | 37/100 | 28 | 3 |
| 24 | Nez Perce | Idaho | 37/100 | 28 | 6 |
| 25 | Lewis | Idaho | 36/100 | 13 | 3 |
| 26 | Shoshone | Idaho | 35/100 | 57 | 13 |
| 27 | Kootenai | Idaho | 34/100 | 90 | 15 |
| 28 | Franklin | Idaho | 34/100 | 37 | 7 |
| 29 | Bingham | Idaho | 34/100 | 35 | 9 |
| 30 | Minidoka | Idaho | 34/100 | 6 | 4 |
| 31 | Latah | Idaho | 33/100 | 38 | 12 |
| 32 | Benewah | Idaho | 33/100 | 12 | 5 |
| 33 | Custer | Idaho | 32/100 | 48 | 6 |
| 34 | Bonneville | Idaho | 32/100 | 28 | 13 |
| 35 | Teton | Idaho | 32/100 | 3 | 4 |
| 36 | Caribou | Idaho | 31/100 | 28 | 6 |
| 37 | Bear Lake | Idaho | 31/100 | 8 | 9 |
| 38 | Boundary | Idaho | 30/100 | 63 | 5 |
| 39 | Fremont | Idaho | 30/100 | 12 | 8 |
| 40 | Jefferson | Idaho | 28/100 | 14 | 6 |
| 41 | Madison | Idaho | 27/100 | 7 | 4 |
| 42 | Clark | Idaho | 27/100 | 6 | 2 |
| 43 | Butte | Idaho | 25/100 | 7 | 3 |
Methodology
County rankings for Idaho 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.