The highest AQ index in Washington (as of 14:00 PDT) is currently the Clarkston area. Particle Pollution (PM2.5) is measuring at 55 (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 Cascade foothills of King-Pierce Counties area. It is forecasted to be Moderate, meaning air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
For 9/14-18 (Mon-Fri): Expect mostly GOOD air quality across the region. Potential for MODERATE to UNHEALTHY FOR SENSITIVE GROUPS air quality Tue night through Thu afternoon in Eastern Snohomish and Eastern King Counties depending on wildfire activity.
| 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 29 minutes ago
Below is a list of counties in Washington. Click on any county below and you'll get a list of cities where we provide AQ index forecasts.