Wyoming DEQ Herschler Building 122 West 25th St. Cheyenne, Wyoming82002 Phone: (307) 777-7937 Fax: (307) 777-7682 Email: deqwyo@state.wy.us Web Address: http://deq.state.wy.us DEQ Mission: To protect, conserve and enhance the quality of Wyoming’s environment for the benefit of current and future generations.