Site

State

PM AQI* (ug/m3)

McAlester

OK

40

Copan

OK

26

Terre Haute-Lafayette Ave

IN

23

Portola

CA

23

Tulsa

OK

22

Ponca City

OK

21

Moses Lake-Balsam St

WA

20

Indpls-W.18th St

IN

20

Glenpool

OK

19

Near Road

KY

19