Collecting and analyzing ambient air monitoring data is valuable for understanding the state of air quality and addressing perceptions and concerns about it relates to health impacts. Results of trend analysis of ambient air data at two Alberta monitoring stations, i.e., Edmonton and Fort McKay, were presented. Pollutant concentrations and hourly exceedance frequencies corresponding to cumulative frequency values were examined. Trends include SO2, NO2, O3 etc. Changes or lack of changes observed in air quality do not necessarily provide an indication of what may happen over the long-term. The decreasing trends observed for PM2.5, SO2, etc. may be related to better emission controls from automobiles. This is an abstract of a paper presented at the AWMA's 99th Annual Conference and Exhibition (New Orleans, LA 6/20-23/2006).