I wouldn't eat the fish from in there... They are fun to catch but seriously guys the guide to eating Ontario sportfish says I can eat some stuff common sense would tell 99% of us otherwise. Say's you can eat sucker out of the Don river in Toronto. Also Suckers, Browns, and Bows out of the Humber. Ohh and anyone up to eat your fair share of Salmon, Browns, Bass, Bows, Pike and Perch out of HAMILTON HARBOR? Yea all straight from the guide guys. If ya take a peek at the grand you will see what runs off into it, lots of nice sludge down in dunnville, and all the way up. Its your choice of course but I would NEVER unless i was going to die of starvation and could risk dying prematurely eat fish out of the river that far down. Way upstream, sure you can find clean waters but caledonia and the like areas, you're eating a heck of alot of contaminants.
Bon appetite!