Site

State

PM AQI* (ug/m3)

John Day Dayton St

OR

19

Sunnyside-S 16th

WA

12

Cove - City Hall

OR

10

Clarkston-13th St

WA

10

Toppenish-Yakama Tribe

WA

10

Baker City - Forest Service

OR

9

Roseburg - Garden Valley Blvd.

OR

9

Seattle-10th & Weller

WA

9

Seattle-South Park

WA

9

Tacoma-Alexander Ave

WA

9