Loss of floodplain, riparian habitat, and river complexity resulting from a range of agricultural and urban development over the decades.
Water quality violations for temperature, bacteria, and mercury, and a continued increase in pesticides, as well as emerging contaminants such as flame retardants.
Continued permitted point-source pollution
Non-point source pollution or runoff from urban and rural areas.
Large flood-control dams that significantly block fish passage on most of the major Willamette River tributaries.
Fish consumption advisories
A massive Superfund site in Portland Harbor - with 10 miles of contaminated sediments polluted with historic chemicals such as PCBs, DDT, and oil-based pollutants.