Knob Noster WWTP - Secondary Wastewater Treatment Plant in Knob Noster, Missouri

The Knob Noster Wastewater Treatment Plant (WWTP) is a municipal facility located in Knob Noster, Johnson County, Missouri. It serves a population of about 2,517 residents, providing secondary treatment to remove organic matter and suspended solids from domestic wastewater. The plant's designed capacity is 1,892.70 thousand gallons per day, with an average daily discharge volume of 870.65 thousand gallons. As a secondary treatment plant, Knob Noster WWTP meets the minimum technology-based requirements under the US Clean Water Act. Facilities of this scale in Missouri typically operate under a National Pollutant Discharge Elimination System (NPDES) permit issued by the Missouri Department of Natural Resources, which sets effluent limits to protect water quality. The plant's treatment process likely includes biological treatment followed by clarification and disinfection. The treated effluent is discharged to a receiving water body within the Missouri River basin, ultimately flowing into the Mississippi River and the Gulf of Mexico. The plant plays a key role in protecting local streams and groundwater from nutrient pollution and pathogens, supporting aquatic life and downstream water quality in the region.

The Knob Noster WWTP discharges into a tributary of the Missouri River, which flows into the Mississippi River and eventually the Gulf of Mexico. The local watershed supports diverse aquatic habitats and is part of a larger agricultural and urban landscape. Proper treatment helps reduce nutrient loads that could contribute to hypoxia in the Gulf of Mexico.