FCPWSD 1 Twin Lakes Wastewater Treatment Plant, Franklin County, Missouri

FCPWSD 1 Twin Lakes is a municipal wastewater treatment plant located in Franklin County, Missouri, United States. The facility serves a small population of 130 residents, reflecting its role in a rural or suburban community. As a secondary treatment plant, it provides biological treatment to reduce organic matter and suspended solids before discharge. The plant operates under the U.S. Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all point source discharges. Facilities of this scale typically hold permits issued by the Missouri Department of Natural Resources. The plant's designed capacity of 136.27 units indicates it has room for modest growth, with current discharge volume at 45.43 units. The treated effluent is discharged into a local waterway within the Mississippi River basin. The receiving water body ultimately drains into the Mississippi River, which flows to the Gulf of Mexico. This downstream connection underscores the plant's role in protecting regional water quality and the broader aquatic ecosystem.

The plant discharges into a tributary of the Mississippi River basin, which flows through Missouri and eventually reaches the Gulf of Mexico. The local watershed supports diverse aquatic life and is part of a larger system that includes important migratory corridors for fish and birds. The plant's secondary treatment helps reduce nutrient loading, which is critical for preventing downstream hypoxia in the Gulf.