Site

State

PM AQI* (ug/m3)

Colville-E 1st St

WA

15

Portland - SE Lafayette

OR

14

Lyons

OR

13

Omak-Colville Tribe

WA

13

John Day Dayton St

OR

12

Portland Near Road

OR

11

Toppenish-Yakama Tribe

WA

11

Yacolt-Yacolt Rd

WA

10

Eugene - Highway 99

OR

10

Eugene - Amazon Park

OR

10