Select “Streamflow and Stage” for near real time hourly data and graphs
Select “Continuous Water Quality Monitors” for near real time hourly water quality data
Select “Reports” for USGS reports on the Tualatin River Basin
In 1990, the Oregon District of the U.S. Geological Survey began a water-quality assessment
of the Tualatin River, in partnership with Clean Water Services (formerly Unified Sewerage
Agency of Washington County, Oregon). These web pages are intended to provide an overview
of that project, and to provide selected data from the Tualatin River Basin.
* Site contains general info describing the basin and projects, stream flow and stage, water
quality data, weather and precipitation in Portland Metro area, published reports, and other
relevant links for USGS, Washington County, and Tualatin River Watershed.