The electric power sector in the United States faces a changing market environment, one that features reduced or flattened demand, low natural gas prices, new environmental regulations, and continued uncertainty about the future regulation of carbon. Among the regulations recently proposed or currently under development by the U.S. Environmental Protection Agency (EPA) are rules to address air pollution transport, air toxics, coal ash, and cooling water intake structures at existing plants. These regulations are expected to result in significant public health and environmental benefits that, when monetized, are well in excess of compliance costs.