Site

State

PM AQI* (ug/m3)

North OKC

OK

25

San Antonio Old Hwy90 C677

TX

25

Laredo C313

TX

24

Seiling

OK

23

Union

OK

23

Austin Webberville Road C171

TX

22

Near Road OKC

OK

22

Tulsa

OK

22

Lawton North

OK

21

Ponca City

OK

21