Out of curiosity, can you eat fish caught out of the Potomac? I used to fish there with a friend and eat everything that was of a decent size. But I very recently saw a fishing video with a bunch of dead fish periodically floating by and in the comments section someone said the Potomac was full of bacteria now and probably not safe to eat fish out of. That would be a shame, it was a great fishery.
I would from above DC, I would from the mouth at the bay. In and near DC? Not so much.