Marshfield WWTP - Municipal Wastewater Treatment in Marshfield, Wisconsin

Marshfield WWTP is a municipal wastewater treatment facility located on South Galvin Avenue in Marshfield, Wood County, Wisconsin. It serves a population of approximately 19,400 residents, placing it in the medium-agglomeration category for US wastewater infrastructure. As a US facility, Marshfield WWTP operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permitting. For plants serving populations of this scale, secondary treatment is typically required to meet effluent limitations for biochemical oxygen demand and total suspended solids. Regulatory compliance ensures protection of local water quality. The plant discharges treated wastewater into the local watershed, which drains into the Wisconsin River and ultimately the Mississippi River system. This river network supports diverse aquatic life and provides drinking water for downstream communities. The plant's operations are critical for maintaining water quality in this ecologically significant basin.

Marshfield WWTP discharges into the Wisconsin River basin, which flows southward to join the Mississippi River. The Wisconsin River supports a variety of fish species and provides habitat for migratory birds. Downstream, the Mississippi River is a major ecological corridor for North America. The plant's treated effluent must meet standards to protect these waters from nutrient pollution and other contaminants.