ELROY WWTP - Secondary Wastewater Treatment in Elroy, Wisconsin

ELROY WWTP is a municipal wastewater treatment facility located in Elroy, Wisconsin, United States. The plant serves a population of approximately 1,578 residents and operates as a secondary treatment facility, which is the standard level required under the U.S. Clean Water Act for most municipal plants. The plant has a designed capacity of 908.50 thousand cubic meters per year and currently treats an annual discharge volume of 688.95 thousand cubic meters. As a secondary treatment plant, it uses biological processes to remove organic matter and suspended solids, meeting the effluent quality standards set by the U.S. Environmental Protection Agency (EPA) and enforced through state-level permits. The treated wastewater is discharged into a local water body that ultimately drains into the Mississippi River Basin. The plant's operations help protect downstream water quality and aquatic ecosystems in the region, which includes the Upper Mississippi River watershed known for its diverse fish and wildlife habitats.

The plant discharges into a receiving water body within the Mississippi River Basin, which flows southward to the Gulf of Mexico. The watershed supports a variety of aquatic species and is an important migratory corridor for birds. The plant's secondary treatment helps reduce nutrient loads and organic pollutants, contributing to the ecological health of the downstream river system.