Site

State

PM AQI* (ug/m3)

Marysville-7th Ave

WA

26

Tacoma-L St

WA

23

Portland - SE Lafayette

OR

23

Klamath Falls - Peterson Sc...

OR

19

Tacoma-S 36th St

WA

17

Seattle-Duwamish

WA

17

Maple Falls-Azure Way

WA

17

Kent-James & Central

WA

17

Vancouver-NE 84th Ave

WA

17

Custer-Loomis (SO-AQS)

WA

15