Site

State

PM AQI* (ug/m3)

Mesa 2 /Nipomo

CA

21

Nipomo Mesa CDF

CA

21

Ascarate Park Southeast C37

TX

20

Paonia

CO

19

Vernal #4

UT

18

Otay Mesa - Donovan

CA

17

Grand Junction - Powell Bui...

CO

16

Hidden Valley

AZ

16

Ponca City

OK

16

Los Angeles - N. Main Street

CA

15