Site

State

PM AQI* (ug/m3)

South Phoenix

AZ

22

Laredo C313

TX

21

Mission C43

TX

20

San Antonio Old Hwy90 C677

TX

19

Lawton North

OK

18

Indio-29 Palms

CA

18

Eagle Pass C319

TX

17

North OKC

OK

17

Von Ormy Highway 16

TX

17

Fort Worth CA Parkway N C1053

TX

17