Howards Grove STP - Advanced Wastewater Treatment in Howards Grove, Wisconsin

Howards Grove STP is a municipal wastewater treatment facility located at 1101 Alcott Avenue in Howards Grove, Sheboygan County, Wisconsin. The plant serves a population of approximately 3,190 people, classifying it as a small to medium agglomeration under US regulatory frameworks. The facility employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 1,211.33 thousand cubic meters per year and an actual discharge volume of 832.79 thousand cubic meters per year, the plant operates below its capacity. As a US facility, it is subject to the Clean Water Act and operates under an NPDES permit issued by the Wisconsin Department of Natural Resources, ensuring compliance with effluent limits. The plant's treated effluent ultimately reaches Lake Michigan via local waterways. Lake Michigan is a vital freshwater resource supporting diverse aquatic life, recreational activities, and municipal water supplies. The advanced treatment helps protect the lake from nutrient pollution, which can cause algal blooms and degrade water quality.

Howards Grove STP discharges into the Lake Michigan basin, a major Great Lake that drains into the Atlantic Ocean via the St. Lawrence River. The plant's advanced treatment reduces nutrient loads, helping to mitigate eutrophication risks in the nearshore zone. Lake Michigan supports a rich ecosystem, including native fish species and migratory birds, and provides drinking water for millions. The plant's proximity to the coast (within 10 km) underscores the importance of stringent treatment to protect this sensitive freshwater resource.