FENNVILLE STP - Secondary Wastewater Treatment in Fennville, Michigan

FENNVILLE STP is a municipal wastewater treatment plant located on Wilson Street in Fennville, Allegan County, Michigan. The facility serves a population of approximately 1,403 residents and is situated within 10 kilometers of the Lake Michigan shoreline, placing it in a sensitive coastal environment. The plant provides secondary treatment, which is the standard level required by the US Clean Water Act for municipal wastewater facilities. With a designed capacity of 529.96 thousand cubic meters per day and an average discharge volume of 302.83 thousand cubic meters per day, the plant operates at roughly 57% of its design capacity. As a US facility, it operates under a National Pollutant Discharge Elimination System (NPDES) permit issued by the Michigan Department of Environment, Great Lakes, and Energy (EGLE), which sets effluent limits to protect water quality. The treated effluent from FENNVILLE STP ultimately drains into Lake Michigan, one of the five Great Lakes that form the largest surface freshwater system on Earth. The plant's coastal location requires careful management to prevent nutrient loading and protect the lake's aquatic ecosystem, which supports diverse fish populations and provides drinking water for millions of people.

The plant discharges into the Lake Michigan watershed, which drains into the Great Lakes system and eventually the St. Lawrence River and Atlantic Ocean. Lake Michigan supports a diverse aquatic ecosystem, including native fish species such as lake trout and whitefish, and is a critical resource for regional water supply and recreation. The coastal location necessitates stringent nutrient control to prevent algal blooms and maintain water quality.