14-Days of Turbidity at the Willamette River at Portland, OR . . . The Willamette River at Portland site is located at the Morrison Bridge in downtown Portland, OR Data are collected every half hour Periods with no data are plotted are plotted as grey areas These data are provisional and are subject to revision Turbidity data are measured in FNU units
USGS 14211720 WILLAMETTE RIVER AT PORTLAND, OR Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2 5 degrees, formazin nephelometric units (FNU)
Willamette River below Falls at Oregon City Thank you for visiting a National Oceanic and Atmospheric Administration (NOAA) website The link you have selected will take you to a non-U S Government website for additional information
7-Days of Data at the Willamette River at Portland, OR (14211720) Turbidity Turbidity data are measured in FNU units Graph updated: Wednesday - Jun 18, 2025 at 23:00:49 EDT Estimated Secchi Depth Secchi depth data are estimated based on turbidity data and are measured in feet Graph updated: Wednesday - Jun 18, 2025 at 23:00:48 EDT Chlorophyll Fluorescence (RFU) Graph updated: Wednesday - Jun 18, 2025 at
Water-quality monitoring during reservoir drawdowns Sediment transport, turbidity, and dissolved oxygen were evaluated during six consecutive water years (2013–2018) of drawdowns of a flood control reservoir in the upper Willamette Valley, Oregon, USA