Site

State

PM AQI* (ug/m3)

Seattle-Duwamish

WA

13

Taholah-Quinault Tribe

WA

10

Leavenworth-Evans St

WA

9

Omak-Colville Tribe

WA

9

Twisp-Glover St

WA

8

Wenatchee-Fifth St

WA

8

Provolt - Seed Orchard

OR

8

Chehalis-Market Blvd

WA

7

Shady Cove - Shady Cove School

OR

7

Tacoma-S 36th St

WA

7