The Treatment Systems Division is responsible for the proper operation and maintenance (O&M) of the wastewater treatment facility and 31 pumping stations to ensure that residential, commercial and industrial wastewater is adequately treated before being discharged into the Fore River, and ultimately Casco Bay. Effluent from the City’s wastewater facility must meet strict state and federal water quality guidelines. The Treatment Systems Division must also ensure that the City’s major industries do not discharge excess amounts of materials that could compromise the proper functioning of wastewater treatment facility.