I suppose the river could be contaminated if the nuclear fallout is upstream -- but that would mean that the water supply for the entire city would be compromised or imported...

Linda needs to talk to Piper too -- I don't think *they've* had a scene together since the Rogues War, and she and Piper used to have almost as many scenes as Wally and Piper.

Well, Wally *shouldn't* talk, but he's not above being stupidly judgmental on occasion.