The Department of Environmental Protection is a Commonwealth agency that oversees environmental issues, including: air quality, water supplies and waterways, dams and mines, mine safety, oil and gas deposits, energy conservation, land and water management, flood control and nonpoint pollution, solid and other wastes, recycling, renewable energy and alternative fuel programs and all state conservation programs. The address for DEP: Rachael Carson Building, 4th and Market Streets, Harrisburg, PA 17105