I still fish in the Mississippi here in St. Paul, but I don't eat any fish out of the river. If I want eating fish, I head for a local lake, some distance from industrial areas.
I caught a 20 lb. channel catfish right in downtown St. Paul the other day. Nice fish. It's back swimming in the river. Maybe I'll catch it again later, once it gets big. [grin]
I was at a Chinese seafood restaurant in Minneapolis the other day, and when the gentlemen at the table asked the waiter where they got the walleye they had just had from, he replied "Lake Minnetonka" and then quickly said "Just kidding. It's imported from Canada".