Sequence of station data for PM2.5 and 10 are listed at head of specific excel files. Times are in MST!! Thus, to convert to UTC you need to add 7 hrs during PCAPS period. http://www.airmonitoring.utah.gov/network/Counties.htm I believe we have the following: PM2.5 hourly: Hawthorne Cottonwood Brigham City Logan Lindon (provo) Tooele PM10 hourly: Cottonwood Hawthorne N. Salt Lake Ogden N. Provo Lindon