Time-Integrated Passive Sampling as a Complement to Conventional Point-in-Time Sampling for Investigating Drinking-Water Quality, McKenzie River Basin, Oregon, 2007 and 2010-11

摘要

The Eugene Water & Electric Board (EWEB) supplies drinking water to approximately 200,000 people in Eugene, Oregon. The sole source of this water is the McKenzie River, which has consistently excellent water quality relative to established drinking-water standards. To ensure that this quality is maintained as land use in the source basin changes and water demands increase, EWEB has developed a proactive management strategy that includes a combination of conventional point-in-time discrete water sampling and time-integrated passive sampling with a combination of chemical analyses and bioassays to explore water quality and identify where vulnerabilities may lie. In this report, we present the results from six passive-sampling deployments at six sites in the basin, including the intake and outflow from the EWEB drinking-water treatment plant (DWTP).