Site

State

PM AQI* (ug/m3)

Oak Harbor-SW 6th (US)

WA

27

John Day Dayton St

OR

14

Maple Falls-Azure Way

WA

13

Lyons

OR

11

Mill City

OR

10

Newport-Calispel

WA

10

Moses Lake-Balsam St

WA

9

Burns - Washington St.

OR

8

Corvallis - Circle Blvd.

OR

8

Colville-E 1st St

WA

8