AQI 42 · PM2.5 · Trend: Variable (wildfires)
| Average AQI | 42 |
| Good Days / Year | 245 |
| Unhealthy Days / Year | 12 |
| Primary Pollutant | PM2.5 |
| PM2.5 Average | 7.5 µg/m³ |
| Trend | — Variable (wildfires) |
| Monitoring Stations | 35 |
| Nonattainment Areas | 0 |
Oregon's air quality story is defined by wildfires. Most of the year, the state enjoys good to excellent air quality, but wildfire smoke events can suddenly push AQI to hazardous levels. The Rogue Valley (Medford) and other mountain valleys are particularly vulnerable.
Oregon DEQ Air Quality Division manages standards. Aggressive wildfire smoke response plans. Wood stove regulation and replacement programs. Field burning restrictions.
No current nonattainment areas, though the 2020 Labor Day fires produced some of the worst air quality ever recorded in a US city (Portland AQI > 500).