Site
State
PM AQI* (ug/m3)
Vallecitos-1594 CR-247
NM
339
Liberty (SAHS)
PA
25
Steubenville
OH
24
Anthony
23
Spanish Fork
UT
22
Jefferson
South Valley
20
North Valley
Tonawanda II
NY
19
El Paso UTEP C12
TX
17