We all depend on clean water. Dumping pollutants into streams means filtering downstream at a much higher cost. And it's not like we can trust coal mining companies to do the right thing either... they don't care about their neighbors, the environment, or their own employees health or welfare. All they care about is making money. If ignoring regulations weren't so expensive, they would work their employees into the ground with no protective equipment and no consideration for safety. Some of them have done this anyway. Does anyone really think that they won't immediately start dumping their toxic waste in our public water supply the second this rule goes away? I mean, in the places where they don't already violate it because they are completely shameless and know the trump administration won't go after them for this?