Chili WWTP - Secondary Treatment Plant in Town of Fremont, Wisconsin

Chili WWTP is a municipal wastewater treatment facility located in the Town of Fremont, Clark County, Wisconsin, United States. The plant serves a small population of approximately 300 residents, reflecting its role in a rural community. As a secondary treatment plant, it provides biological treatment to remove organic matter and suspended solids from wastewater. The plant has a designed capacity of 189.27 megaliters per year and currently discharges 75.71 megaliters annually, indicating it operates below its full capacity. Under the U.S. Clean Water Act, secondary treatment is the minimum standard for municipal wastewater treatment, and the plant's operations are subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Wisconsin Department of Natural Resources. The treated effluent from Chili WWTP is discharged into a local waterway that ultimately drains into the Mississippi River Basin. The plant's location in central Wisconsin places it within a region of agricultural and forested landscapes, where maintaining water quality is important for downstream ecosystems and recreational uses.

Chili WWTP discharges into a tributary of the Wisconsin River, which flows into the Mississippi River and eventually the Gulf of Mexico. The local watershed supports diverse aquatic life and is part of a larger river system that provides habitat for fish and migratory birds. Protecting water quality in this region helps sustain downstream ecosystems and recreational fisheries.