Our mission is to provide cost effective, customer oriented wastewater service that protects public health and enhances our natural environment. The DSM's role in this community is to safeguard the environment and our ratepayers through the effective and efficient collection and treatment of sanitary wastewater. A core focus of the DSM is operation and maintenance of six wastewater treatment facilities (also referred to as 'water resource recovery facilities'), close to 100 pumping stations, five overflow retention facilities, and over 1,000 miles of gravity sewer pipe and force mains.