Oregon currently has more than a dozen active, large wildfires burning, the second most in the nation. Wildfires produce a lot of smoke, which can affect air quality over wide areas. This was especially noticeable last summer when the state was blanketed by smoke from numerous wildfires for weeks.
Oregonians concerned about air quality from wildfire smoke can check conditions at https://oregonsmoke.blogspot.com/ A map on the site displays the results of air monitoring stations, color coded to indicate the health impact from the readings. Levels range from good (green) to hazardous (dark red). Tuesday the map showed levels considered unhealthy or hazardous at a number of monitoring stations in Jackson, Klamath and Lake counties.
Additional information about general air quality can be found at this Oregon’s Department of Environmental Quality site https://www.oregon.gov/deq/aq/Pages/default.aspx