| Area of winter wood smoke | Per cent of PM 2.5 or total carbon from Wood Smoke |
| San Francisco Bay Area, CA | 45% |
| Santa Rosa, CA | 65% |
| Fresno, CA | 35.5% |
| Bakersfield, CA | 63% |
| Los Angeles, CA | 40% |
| Grand Canyon, AZ | 50% |
| Las Vegas, NV | 47% |
| Boise, ID | 72 to 89% |
| Missoula, MT | 68% |
| Albuquerque, NM | 75% |
| Portland, OR | 51% |
| Petersville, AL | 85% |
| Seattle, Spokane, WA | 44 to 92% |
| Raleigh, NC | 95% |
| Puget Sound, WA | 63% |
Source: US EPA, PSAQMD, BAAQMD, CA ARB
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