Site

State

PM AQI* (ug/m3)

Socorro Hueco C49

TX

28

Anthony

NM

27

South Valley

NM

27

North Valley

NM

26

Jefferson

NM

25

Paonia

CO

24

Rangely, CO

CO

24

Ascarate Park Southeast C37

TX

23

Santa Teresa

NM

22

Grand Canyon ozone bench

AZ

21