The AMSD Treatment Facility uses many distinct treatment processes to treat wastewater. As the wastewater enters the treatment plant it goes through preliminary treatment which is a physical process to remove debris, sand, and other inorganics that can’t be biologically treated. The second process is primary treatment. This process utilizes settling and filtering to remove organic solids. The third step is biological treatment in which oxygen is injected into the wastewater to support the growth of microorganisms. These microorganisms clean the wastewater by consuming organic matter (suspended and dissolved) and convert ammonia-nitrogen to nitrogen gas through the process of nitrification/denitrification. The microorganisms are then separated from the treated water by secondary clarification and removed from the process as sludge. In the final stage, the clarified water is disinfected with sodium hypochlorite to eliminate disease causing pathogens before the treated effluent is discharge into the Kennebec River. The solid materials generated from these processes are removed with equipment that concentrates the solids and drains off excess water. The dried solids are transported to Waste Management Landfill in Norridgewock, ME for disposal.

The District is planning to replace a portion of the stormwater drainage system that serves Main Street, Madison. Over the years, during heavy rain events Main Street and area business have become flooded. A larger diameter pipe will be installed from Main Street to Jones Brook to increase flow capacity. The project will be funded by a grant from the Maine Infrastructure Adaptation Fund.

The Trustees meet at 52 Main Street, Madison on the third Wednesday of each month @ 5:30pm and the public is always welcome to attend. We encourage any citizen who resides within the District and has an interest in serving as a Trustee for the District to contact our Office @ 696-5211 for further information.