The Oregon Department of Human Services has an active fish advisory on the Portland Harbor, which was issued in June of 2004..
 
PCB levels

• Women of childbearing age, particularly pregnant or breastfeeding women, children and people with weak immune systems, thyroid or liver problems, should avoid eating resident fish from Portland Harbor, especially carp, bass and catfish.
• Healthy women beyond childbearing age and healthy adult males should restrict the amount of resident fish eaten from Portland Harbor to no more than one 8-ounce meal per month.

Wood-treating chemicals

• Crayfish taken within 1000 feet of the property lines of the former McCormick & Baxter site located south of the Burlington Northern Railroad Bridge in Portland Harbor should not be eaten.