Westphalia WWTP - Secondary Treatment Plant in Westphalia, Missouri

Westphalia WWTP is a municipal wastewater treatment facility located in Westphalia, Osage County, Missouri. It serves a small population of 689 residents, reflecting the rural character of the area. The plant operates under the regulatory framework of the U.S. Clean Water Act, which requires secondary treatment for municipal discharges. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. Its designed capacity is 378.54 megaliters per year, and it currently treats an annual discharge volume of 227.13 megaliters, indicating operational headroom. As a U.S. facility, it is subject to National Pollutant Discharge Elimination System (NPDES) permitting, which sets effluent limits to protect water quality. The treated effluent is discharged into a local waterway that drains into the Missouri River system, ultimately reaching the Mississippi River and the Gulf of Mexico. This downstream connection highlights the plant's role in maintaining water quality in a major river basin that supports diverse aquatic life and regional water resources.

The plant discharges into a tributary of the Missouri River, which flows into the Mississippi River and eventually the Gulf of Mexico. The local watershed supports aquatic habitats and is part of a larger river system that provides drinking water, recreation, and ecological services. The plant's secondary treatment helps reduce nutrient and pollutant loads, protecting downstream water quality in this agriculturally influenced region.