Over the last several years, people in Washington state have been exposed to worsening air quality for longer periods of time. The following charts show that increase, based on information from Rahil Dhammapala ’06 PhD (Civ. Eng.) at the Washington State Department of Ecology.

 

View the above chart in PDF format

 

 

Infographic: Amount of time with poor air quality in Washington state

View the above chart in PDF format

 

(Read more about air quality predictions in Washington in “In the hazy days of summer.”)