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Summary of county-level PM2.5 concentrations (μg/m3)
| Exposure Metrics | Mean | Maximum | County-Day N (%) | |||
|---|---|---|---|---|---|---|
| 1 to <10 µg/m3 | 10 to <35 µg/m3 | 35 µg/m3 and above | Total | |||
| Wildfire-PM2.5 | 1.01 | 277.45 | 74,888 (16.8) | 6542 (1.5) | 990 (0.2) | 444,894 |
| Background-PM2.5 | 4.52 | 63.48 | 401,155 (90.2) | 27,649 (6.2) | 79 (0.02) | 444,894 |
| Total PM2.5 | 5.54 | 280.64 | 379,800 (85.4) | 50,001 (11.2) | 1641 (0.4) | 444,894 |
