Site

State

PM AQI* (ug/m3)

Unit153

MT

23

Cooper Landing

AK

22

Sequoia and Kings Canyon - ...

CA

19

San Antonio Old Hwy90 C677

TX

19

Camden Spruce St

NJ

19

Liberty (SAHS)

PA

18

RIT

PA

17

Arendtsville

PA

17

Springfield PM

OH

16

LUMS 2

DE

16