Tualatin River Basin Water Quality Assessment
In 1990, the Oregon Water Science Center of the U.S. Geological Survey began a water-quality assessment of the Tualatin River, in partnership with Clean Water Services. These web pages are intended to provide an overview of that project, and to provide selected data from the Tualatin River Basin.
A new report describing Tualatin River plankton communities and investigating the factors that affect those communities was published recently. Read the full report at http://pubs.usgs.gov/sir/2013/5037/.