Hi,
In response to the question as to how wide spread the smallmouth problem is, all I can tell you is that WVa portions of the Potomac, the Shennandoah and the Susquehanna have all been seriously affected. The Shennandoah, and the Potomac do converge in the area of Harpers Ferry and I believe that area is blamming things on the poultry farms and plants that are situated along its banks. I do not have any info on the source of the problem for the Susquehanna which lies further east (past Baltimore) and runs through Pa into Md. It does seem weird though, that these prime fisheries are all affected at one time. I have not been out much this summer due to health issues and have not made inquiries if the Potomac problems have worked their way downstream to suburban Maryland and into DC or if things have been contained further up in the mountains.