Orfordville STP - Advanced Wastewater Treatment in Orfordville, Wisconsin

Orfordville STP is a municipal wastewater treatment facility located at 667 West Brodhead Street in Orfordville, Rock County, Wisconsin. The plant serves a population of approximately 1,503 residents and operates under the regulatory framework of the United States Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all point source discharges. The plant provides advanced treatment, exceeding the secondary treatment standard typically required for municipal facilities. With a designed capacity of 1,506.59 megaliters and an annual discharge volume of 454.25 megaliters, the plant operates well below its capacity, indicating potential for future growth or seasonal variability. The treated effluent is discharged into local waterways that ultimately drain into the Rock River basin, a tributary of the Mississippi River. The plant's advanced treatment helps protect downstream aquatic ecosystems and supports water quality in the region.

The plant discharges into the Rock River watershed, which flows southward through Wisconsin and Illinois before joining the Mississippi River. The Rock River supports diverse aquatic life, including game fish species, and is an important migratory corridor for waterfowl. Advanced treatment at Orfordville STP reduces nutrient loads, helping to mitigate eutrophication risks in downstream water bodies.