Site

State

PM AQI* (ug/m3)

Broadus

MT

24

Ponca City

OK

20

Mesa 2 /Nipomo

CA

19

King City AMS

CA

18

MILITARY PARK

MI

17

Chanute

KS

17

Texarkana New Boston

TX

17

Globeville

CO

17

North OKC

OK

17

Nipomo Mesa CDF

CA

16