Out of 3,162 counties with wildfire data, these are the counties with the highest smoke exposure risk.
| Statistic | Value |
|---|---|
| Counties ranked | 3,162 |
| Avg smoke risk (top 100) | 53/100 |
| Total county fires 5yr (top 100) | 7,180 |
Top 100 Counties
| Rank | County | State | Smoke Risk | County Fires (5yr) | ZIP Codes |
|---|---|---|---|---|---|
| 1 | Riverside | California | 96/100 | 157 | 101 |
| 2 | Los Angeles | California | 88/100 | 117 | 459 |
| 3 | San Diego | California | 83/100 | 170 | 187 |
| 4 | Gila | Arizona | 77/100 | 172 | 15 |
| 5 | San Bernardino | California | 77/100 | 150 | 114 |
| 6 | Navajo | Arizona | 76/100 | 63 | 21 |
| 7 | Yavapai | Arizona | 74/100 | 126 | 34 |
| 8 | Pima | Arizona | 69/100 | 78 | 72 |
| 9 | Inyo | California | 66/100 | 150 | 42 |
| 10 | Kern | California | 65/100 | 298 | 102 |
| 11 | Madera | California | 65/100 | 157 | 16 |
| 12 | Coconino | Arizona | 64/100 | 167 | 36 |
| 13 | Miami-Dade | Florida | 63/100 | 96 | 131 |
| 14 | Marion | Florida | 61/100 | 125 | 37 |
| 15 | Collier | Florida | 60/100 | 121 | 28 |
| 16 | Washington | Utah | 59/100 | 77 | 22 |
| 17 | Tuolumne | California | 59/100 | 58 | 16 |
| 18 | Maricopa | Arizona | 58/100 | 124 | 197 |
| 19 | Mariposa | California | 58/100 | 58 | 6 |
| 20 | Otero | New Mexico | 57/100 | 28 | 15 |
| 21 | Mohave | Arizona | 55/100 | 113 | 28 |
| 22 | Volusia | Florida | 55/100 | 14 | 48 |
| 23 | Oglala Lakota | South Dakota | 54/100 | 129 | 1 |
| 24 | Okanogan | Washington | 53/100 | 126 | 20 |
| 25 | Chelan | Washington | 53/100 | 86 | 13 |
| 26 | Calaveras | California | 53/100 | 12 | 16 |
| 27 | Atlantic | Utah | 53/100 | 4 | 1 |
| 28 | Lee | Florida | 53/100 | 1 | 49 |
| 29 | Washoe | Nevada | 52/100 | 160 | 38 |
| 30 | Yakima | Washington | 52/100 | 105 | 26 |
| 31 | Siskiyou | California | 52/100 | 102 | 19 |
| 32 | Ventura | California | 52/100 | 54 | 44 |
| 33 | Santa Cruz | Arizona | 52/100 | 53 | 8 |
| 34 | Shasta | California | 52/100 | 37 | 31 |
| 35 | Valley | Idaho | 51/100 | 182 | 5 |
| 36 | Cochise | Arizona | 51/100 | 140 | 29 |
| 37 | Clark | Nevada | 51/100 | 125 | 125 |
| 38 | Pinal | Arizona | 51/100 | 124 | 48 |
| 39 | Ravalli | Montana | 51/100 | 34 | 9 |
| 40 | Grant | New Mexico | 51/100 | 34 | 18 |
| 41 | Broward | Florida | 51/100 | 7 | 85 |
| 42 | Lake | Florida | 50/100 | 125 | 36 |
| 43 | Butte | California | 50/100 | 117 | 29 |
| 44 | Plumas | California | 50/100 | 101 | 14 |
| 45 | Fresno | California | 50/100 | 41 | 102 |
| 46 | Lincoln | New Mexico | 50/100 | 28 | 18 |
| 47 | Brevard | Florida | 50/100 | 11 | 46 |
| 48 | Orange | California | 50/100 | 6 | 143 |
| 49 | Lake | California | 50/100 | 6 | 21 |
| 50 | Idaho | Idaho | 49/100 | 182 | 13 |
| 51 | Apache | Arizona | 49/100 | 167 | 33 |
| 52 | Josephine | Oregon | 49/100 | 114 | 10 |
| 53 | Wasco | Oregon | 49/100 | 50 | 8 |
| 54 | Trinity | California | 49/100 | 48 | 10 |
| 55 | Nevada | California | 49/100 | 16 | 14 |
| 56 | Monterey | California | 49/100 | 6 | 36 |
| 57 | Jackson | Oregon | 48/100 | 161 | 16 |
| 58 | Harrison | Mississippi | 48/100 | 67 | 17 |
| 59 | Tulare | California | 48/100 | 41 | 36 |
| 60 | Adams | Idaho | 48/100 | 37 | 5 |
| 61 | Pittsburg | Oklahoma | 48/100 | 15 | 17 |
| 62 | Llano | Texas | 48/100 | 11 | 6 |
| 63 | Douglas | Nevada | 47/100 | 160 | 11 |
| 64 | Catron | New Mexico | 47/100 | 79 | 7 |
| 65 | Deschutes | Oregon | 47/100 | 68 | 12 |
| 66 | Kittitas | Washington | 47/100 | 65 | 10 |
| 67 | Hutchinson | Texas | 47/100 | 46 | 5 |
| 68 | Jefferson | Oregon | 47/100 | 46 | 3 |
| 69 | Boise | Idaho | 47/100 | 44 | 8 |
| 70 | Potter | Texas | 47/100 | 34 | 22 |
| 71 | Taylor | Texas | 47/100 | 21 | 21 |
| 72 | Santa Fe | New Mexico | 47/100 | 18 | 23 |
| 73 | Polk | Florida | 47/100 | 11 | 53 |
| 74 | Mora | New Mexico | 47/100 | 9 | 13 |
| 75 | Shannon | South Dakota | 46/100 | 129 | 8 |
| 76 | Seminole | Oklahoma | 46/100 | 106 | 8 |
| 77 | Palm Beach | Florida | 46/100 | 96 | 72 |
| 78 | Jackson | Mississippi | 46/100 | 49 | 14 |
| 79 | Bannock | Idaho | 46/100 | 37 | 11 |
| 80 | Santa Barbara | California | 46/100 | 31 | 40 |
| 81 | Brown | Texas | 46/100 | 22 | 8 |
| 82 | El Dorado | California | 46/100 | 20 | 24 |
| 83 | Gillespie | Texas | 46/100 | 14 | 4 |
| 84 | Burnet | Texas | 46/100 | 12 | 4 |
| 85 | Flagler | Florida | 46/100 | 11 | 17 |
| 86 | Osceola | Florida | 46/100 | 11 | 11 |
| 87 | Okmulgee | Oklahoma | 46/100 | 10 | 8 |
| 88 | Colfax | New Mexico | 46/100 | 2 | 8 |
| 89 | Orange | Florida | 46/100 | 1 | 76 |
| 90 | Elko | Nevada | 45/100 | 153 | 17 |
| 91 | Putnam | Florida | 45/100 | 125 | 22 |
| 92 | Elmore | Idaho | 45/100 | 100 | 7 |
| 93 | Crook | Oregon | 45/100 | 66 | 2 |
| 94 | Gem | Idaho | 45/100 | 22 | 2 |
| 95 | Amador | California | 45/100 | 20 | 18 |
| 96 | McIntosh | Oklahoma | 45/100 | 16 | 5 |
| 97 | Kerr | Texas | 45/100 | 14 | 8 |
| 98 | Tulsa | Oklahoma | 45/100 | 10 | 63 |
| 99 | Coleman | Texas | 45/100 | 10 | 5 |
| 100 | Hendry | Florida | 45/100 | 8 | 5 |
Methodology
County rankings are based on average smoke risk score across all ZIP codes in the county, weighted by fire proximity and county fire frequency over 5 years.
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.