You should never consume fish from the Hanford area. People don't realize the extent of the mess that was left by the DOE. While they have been cleaning it up for a while, there was a tremendous amount of radioactive waste put into the Columbia.

Want to learn just how bad it is? Check this out:
http://nalu.geog.washington.edu/dms/hanford.html

A link to the actual waste types generated:
http://nalu.geog.washington.edu/dms/areas/100/100.html

In addition to radioactive waste, Hanford regularly dumped hexavalent chromium, a corrosion inhibitor that was at the center of the "Erin Brockovich" lawsuit and movie. Very nasty stuff.