Site

State

PM AQI* (ug/m3)

Portola

CA

30

Yakima-4th Ave

WA

29

Toppenish-Yakama Tribe

WA

28

St. Paul-Harding H.S.

MN

24

Rossiter Pump House

MT

24

Globeville

CO

23

Anderson

CA

23

Denver - CAMP - 2105 Broadway

CO

23

Waterloo, Water Tower

IA

22

Tulsa

OK

22