Sulfurous odor in the Lewiston-Clarkston (LC) area is a nuisance and possible adverse health factor from a kraft pulp paper mill located along the Clearwater River in the city of Lewiston. One chemical that is emitted from paper mills is sulfur dioxide (SO2), one of many that are a byproduct of the mill\u27s production. The goal of this study was to monitor the emissions of SO2 in the LC Valley and the spatial, temporal and diurnal patterns. SO2 can cause increased irritation from respiratory diseases as well as create damaging acid rain that kills plant life and damages structures. In this study there is a small correlation between increase in elevation and increase in SO2 , as well as a slow increase of SO2 over a year\u27s time. A diurnal cycle of emissions during the morning decreasing after noon is observed. All levels were below attainment
