Understanding Sources of Zinc Contamination in Waterways of Eugene-Springfield, OR

Abstract

Data from Amazon Creek, Willow Creek, Spring Creek and the Willamette River through Eugene, Oregon indicate that concentrations of zinc in stormwater runoff and in receiving streams have been increasing over the past 20 years. As such, the causes and extent of elevated zinc levels within the Eugene-Springfield Metro Area are the focus of this study. Preliminary research identified zinc-based moss control products, tire and brake wear, industrial discharges, and more, as likely sources of zinc to the environment. Further efforts, including spatial and temporal analysis through the construction of a series of maps is ongoing. Results aim to make clearer primary sources of zinc contamination within the study area, add to our understanding of the extent of zinc contamination within the area, and inform regulatory guidance for minimizing zinc loading to the environment.