Overview
POY SIPPI SD STP is a secondary wastewater treatment plant serving 550 people in the Town of Poy Sippi, Wisconsin. It discharges 132.49 megaliters annually into the local watershed.
POY SIPPI SD STP is a municipal wastewater treatment facility located in the Town of Poy Sippi, Waushara County, Wisconsin. The plant serves a small population of 550 residents, reflecting the rural character of the area. It operates under the regulatory framework of the United States Clean Water Act, which governs wastewater discharges through the National Pollutant Discharge Elimination System (NPDES) permit program. The plant provides secondary treatment, a standard level for small communities in the US, which typically involves biological processes to remove organic matter and suspended solids. The designed capacity is 181.70 megaliters per year, with an actual discharge volume of 132.49 megaliters, indicating operational headroom. Secondary treatment is sufficient to meet typical permit limits for biological oxygen demand and total suspended solids. The treated effluent is discharged into a receiving water body within the Fox River basin, which ultimately drains into Lake Michigan via Green Bay. This watershed supports diverse aquatic life and recreational uses. The plant's proximity to the coast (within 10 km) means its discharge can influence nearshore water quality, making compliance with discharge permits critical for protecting downstream ecosystems.
Environmental context
The plant discharges into a tributary of the Fox River, which flows into Lake Winnebago and then through the Lower Fox River to Green Bay, an arm of Lake Michigan. This watershed is ecologically significant, supporting fish spawning grounds and migratory bird habitats. The nearshore areas of Lake Michigan are sensitive to nutrient loading, which can contribute to algal blooms. The plant's secondary treatment helps reduce organic pollutants, but nutrient removal may be limited without tertiary processes.
Frequently asked questions
POY SIPPI SD STP is located on Liberty Street in the Town of Poy Sippi, Waushara County, Wisconsin, United States.
The plant serves approximately 550 residents, reflecting a small rural community in central Wisconsin.
The plant discharges treated effluent into a local waterway that is part of the Fox River basin, which flows into Lake Winnebago and ultimately to Green Bay and Lake Michigan.
As a US facility, POY SIPPI SD STP operates under the Clean Water Act and is required to have an NPDES permit issued by the Wisconsin Department of Natural Resources, which sets limits on pollutants in the discharge.
For small communities in Wisconsin, secondary treatment is standard, which uses biological processes to remove organic matter and suspended solids. Some plants may also incorporate disinfection or nutrient removal depending on permit requirements.
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