Wdfw has deemed escaped Atlantic Salmon safe, with no consumption advisories.
All other Salmon in area 7 have advisories for Mercury and PCB's (even pink). Resident blackmouth, which live in the area year-round, are limited to two 8 ounce servings per month. This includes all seafood even from the store. So if you eat two servings of blackmouth, you are supposed to stop eating seafood for a month!
I understand these fish are fed pellets and not wild forage. However since they live in the water where everything else is toxic, I don't understand how it's safe to eat unlimited amounts.