Here at CCC I've previously posted about water quality issues with Shenandoah Valley rivers, most notably trash and animal/human wastes in our streams. When you consider the trash, the mostly unseen mix of chemicals, the bacteria, the nutrients, and the sediment/run-off that goes into our waterways it is pretty scary for anybody who wants to swim, canoe, fish, or use our precious water resources. W.C. Fields only touched on one irrelevant aspect of water quality in his famous quote about why he doesn't drink water. W.C., there are lots of other reasons!
Tom Toles' cartoon in the Washington Post November 13, 2009 sums it up pretty well.