King City WWTP - Secondary Treatment Plant in DeKalb County, Missouri

King City WWTP is a municipal wastewater treatment facility located in DeKalb County, Missouri, serving a small population of 1,013 residents. The plant provides secondary treatment, a standard level for communities of this size in the United States, ensuring compliance with Clean Water Act requirements. The plant has a designed capacity of 567.81 m³/day and currently discharges an average of 378.54 m³/day of treated effluent. As a secondary treatment facility, it uses biological processes to reduce organic matter and suspended solids before discharge. The plant operates under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits to protect water quality. The treated wastewater is discharged to a local waterway, contributing to the Missouri River basin. The plant plays a key role in protecting downstream aquatic ecosystems and maintaining water quality in the region's surface waters.

The plant discharges into a tributary of the Missouri River, which flows into the Mississippi River and ultimately the Gulf of Mexico. The receiving waters support diverse aquatic life and are used for recreation and agriculture. The plant's secondary treatment helps reduce nutrient loading, which is critical for preventing downstream eutrophication in the Gulf of Mexico's hypoxic zone.