Site

State

PM AQI* (ug/m3)

Pagosa Springs

CO

48

Chester

PA

38

Calexico - Ethel Street

CA

23

Portola

CA

21

Terre Haute-Lafayette Ave

IN

19

Otay Mesa - Donovan

CA

18

Thibodaux

LA

17

Nipomo Mesa CDF

CA

17

Sequoia National Park-River Rd

CA

17

YPSILANTI

MI

16