Green Lake SD 1 STP - Town of Princeton, Wisconsin Wastewater Treatment Plant

Green Lake SD 1 STP is a municipal wastewater treatment facility located in the Town of Princeton, Wisconsin, United States. It serves a population of approximately 2,137 residents within Green Lake County. The plant is situated inland, more than 10 kilometers from the coast, and operates under the regulatory framework of the US Clean Water Act. The plant provides secondary treatment, which is the standard level for domestic wastewater in the United States. Its designed capacity is 802.50 thousand cubic meters, with an actual discharge volume of 378.54 thousand cubic meters annually. The facility is part of the municipal infrastructure managed by local authorities, ensuring compliance with state and federal environmental regulations. The treated effluent from Green Lake SD 1 STP is discharged into local waterways that ultimately drain into the Fox River basin and then into Lake Michigan. This watershed supports diverse aquatic life and recreational activities. The plant plays a key role in protecting water quality in the region by reducing nutrient and pollutant loads before discharge.

The plant discharges into the Fox River watershed, which flows into Lake Michigan, one of the Great Lakes. This water body supports a rich ecosystem, including fish species such as lake trout and whitefish, and provides drinking water for millions. The plant's secondary treatment helps reduce organic pollutants and nutrients, mitigating eutrophication risks in the downstream lake environment.