Site	State	PM AQI* (ug/m3)
Copan	OK	28
Mission C43	TX	23
Brownsville C80	TM	20
Baytown C148	TX	18
Laredo C313	TX	18
Corpus Christi - National S...	TX	16
Houston Westhollow C410	TX	14
Corpus Christi Dona Park C635	TX	12
Austin North Interstate 35 ...	TX	12
San Antonio Old Hwy90 C677	TX	12