Little Suamico SD 1 WWTP - Advanced Treatment in Town of Little Suamico, Wisconsin

The Little Suamico SD 1 WWTP is a municipal wastewater treatment facility located in the Town of Little Suamico, Oconto County, Wisconsin. Serving a population of 975, the plant provides advanced treatment to protect local water quality. Its location within 10 kilometers of Lake Michigan places it in a sensitive coastal zone where stringent discharge standards apply. The plant operates under the U.S. Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all discharges. For advanced treatment plants of this scale, permits typically include limits on nutrients, biochemical oxygen demand, and total suspended solids to prevent eutrophication in receiving waters. The plant's designed capacity is 571.60 cubic meters per day, with an average daily flow of 283.91 cubic meters, indicating ample reserve capacity. Treated effluent from the plant ultimately reaches Lake Michigan, part of the Great Lakes system, which provides drinking water for millions and supports diverse aquatic life. The plant's advanced treatment helps reduce nutrient loading that could otherwise contribute to algal blooms in the lake. Its coastal proximity requires careful management to protect recreational uses and fish habitats.

The plant discharges into the Lake Michigan basin, a major freshwater ecosystem that drains into the Atlantic Ocean via the St. Lawrence River. Lake Michigan supports a complex food web including lake trout, whitefish, and migratory birds. Nutrient pollution from wastewater can fuel harmful algal blooms, so advanced treatment is critical for maintaining water quality in this ecologically sensitive Great Lake.