Site

State

PM AQI* (ug/m3)

Huntsville Old Airport

AL

18

PARR

AR

18

San Antonio Old Hwy90 C677

TX

15

HICKORY

NC

13

DYERTEOM

TN

13

North OKC

OK

13

W OWEN SCH

NC

13

Kendal

FL

13

ROCKWELL

NC

13

Von Ormy Highway 16

TX

13