Home > USA > Washington > Snohomish County > Oso
Primary air pollutant in the Oso area:
PM2.5 - 47 Good
Enjoy your outdoor activities.
For Oct 4-7 (Fri-Mon): Expect GOOD air quality this weekend.
Primary Pollutant: PM2.5 - 28 Good
Primary Pollutant: PM2.5 - 28 Good
Primary Pollutant: PM2.5 - 28 Good
Primary Pollutant: PM2.5 - 28 Good
Primary Pollutant: PM2.5 - 28 Good
Primary Pollutant: PM2.5 - 28 Good