Site	State	PM AQI* (ug/m3)
Laredo C313	TX	21
Mission C43	TX	20
San Antonio Old Hwy90 C677	TX	19
Lawton North	OK	18
North OKC	OK	17
Von Ormy Highway 16	TX	17
Fort Worth CA Parkway N C1053	TX	17
Near Road OKC	OK	16
San Antonio IH35 C1069	TX	16
St. Marks Wildlife Refuge	FL	16