COWGILL WWTP - Secondary Wastewater Treatment in Barton County, Missouri

COWGILL WWTP is a municipal wastewater treatment facility located in Barton County, Missouri, United States. The plant serves a small population of 188 residents, reflecting its role in a rural community. It operates under the regulatory framework of the US Clean Water Act, which governs wastewater discharges through the National Pollutant Discharge Elimination System (NPDES) permit program. The plant provides secondary treatment, a standard level required for most municipal facilities in the US to reduce organic matter and suspended solids. Its designed capacity is 113.56 units, with an average daily discharge volume of 94.64 units, indicating operational efficiency within its capacity. As a small-scale facility, it is subject to state-level oversight by the Missouri Department of Natural Resources. The treated effluent from COWGILL WWTP is discharged into a local waterway, likely a tributary of the Osage River basin, which ultimately drains into the Missouri River and then the Mississippi River. This downstream connection highlights the plant's role in protecting water quality in the broader Mississippi River watershed, which supports diverse aquatic life and provides drinking water for millions.

The plant discharges into a local stream within the Osage River basin, a sub-basin of the Missouri River system. The Missouri River flows into the Mississippi River, which empties into the Gulf of Mexico. This watershed supports a variety of fish and wildlife, including migratory birds and freshwater mussels. The plant's secondary treatment helps reduce nutrient loads that could contribute to hypoxia in the Gulf of Mexico.