In assessments of PS resident salmon, they accumulated more PCBs and such that ocean migrants.

Toxics in the food is an issue and there have been at least a few times when WDFW tested the food and the trout to see if that was a source of PCBs in lakes. It wasn't a problem in those cases.

But, since fish food is made up of fish meal it is quite possible that, especially imported meal, could have accumulated toxins and this will accumulate even more in cultured fish.

Have PS Atlantics been compared, side by side, with PS fish? I don't know, but I'll check.