Monitors in the Willamette River at Portland, OR
Data presented on these pages are
provisional and subject to revision.
Recent and historical data from these monitors are available through the USGS
Data Grapher and
Willamette River at Portland, OR (14211720)
Data are downloaded and processed every 3 hours.
The nitrate sensor has been removed temporarily for
servicing. Expect it to be back in service in May, 2016.