Westfield Westside WWTP - Municipal Wastewater Treatment in Westfield, Indiana

Westfield Westside WWTP is a municipal wastewater treatment facility located in Westfield, Hamilton County, Indiana. Serving a population of approximately 23,000, the plant is part of the region's essential water infrastructure, managing domestic wastewater from the growing suburban community. As a U.S. facility, the plant operates under the National Pollutant Discharge Elimination System (NPDES) permit program, established by the Clean Water Act. This regulatory framework requires treatment to meet secondary standards or more stringent limits depending on the receiving water body. The treated effluent is discharged into Little Eagle Creek, a tributary of the White River, which flows through central Indiana before joining the Wabash River and ultimately the Ohio River and Mississippi River system. The plant plays a key role in protecting local water quality and downstream ecosystems, including the diverse aquatic life supported by the White River watershed.

The plant discharges into Little Eagle Creek, which flows into the White River, a major waterway in central Indiana. The White River supports diverse aquatic species and provides habitat for fish, mussels, and birds. Downstream, the river joins the Wabash River, contributing to the Mississippi River basin. Protecting this watershed is critical for maintaining water quality in recreational areas and drinking water sources for downstream communities.