Site

State

PM AQI* (ug/m3)

Unit153

MT

20

Groveland-9010 Hillside Loo...

CA

19

DETROIT - SOUTHWEST

MI

18

Lawrenceville

PA

18

Pinehurst

CA

17

Sequoia National Park-River Rd

CA

17

Laredo C313

TX

17

Mission C43

TX

16

SPRNGDLE

AR

15

Brownsville C80

TM

15