Site

State

PM AQI* (ug/m3)

Portola

CA

37

WY/KC

KS

36

Glenpool

OK

33

Maple Falls-Azure Way

WA

33

Copan

OK

32

Tulsa

OK

31

El Paso UTEP C12

TX

26

Oak Harbor-SW 6th (US)

WA

24

Seeley Elementary School

MT

23

Hurst Road

AK

23