Site

State

PM AQI* (ug/m3)

Pomeroy-Pataha St

WA

11

Anacortes-202 Ave (SO-AQS)

WA

5

Toppenish-Yakama Tribe

WA

5

Seattle-Duwamish

WA

5

Seattle-South Park

WA

5

Colbert-Greenbluff

WA

4

Portland - Sauvie Island

OR

4

Portland Cully Helensview S...

OR

4

Sunnyside-S 16th

WA

4

Tacoma-S 36th St

WA

4