The highest AQ index in Oregon (as of 12:00 MST) is currently the Ontario area. Particle Pollution (PM2.5) is measuring at 62 (Moderate). This means air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
Over the next few days, the highest Particle Pollution (PM2.5) will be in the Portland area. It is forecasted to be Good, meaning air quality is satisfactory, and air pollution poses little or no risk.
| Range | 0 - 50 | 51 - 100 | 101 - 150 | 151 - 200 | 201 - 300 | 301 - 500 |
| Color | ||||||
| Category | Good | Moderate | Unhealthy for Sensitive Groups | Unhealthy | Very Unhealthy | Hazardous |
Last Updated 5 minutes ago
Below is a list of counties in Oregon. Click on any county below and you'll get a list of cities where we provide AQ index forecasts.