Silver Lake WWTP - Secondary Treatment Plant in Shawnee County, Kansas

Silver Lake WWTP is a municipal wastewater treatment facility located in Shawnee County, Kansas, serving a population of approximately 1,311 residents. The plant provides secondary treatment, a standard level for small communities in the United States, ensuring that organic matter and suspended solids are reduced before discharge. The plant has a designed capacity of 745.72 thousand gallons per day and currently treats an average daily flow of 495.89 thousand gallons, indicating it operates below its design capacity. As a US facility, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Kansas Department of Health and Environment, which set effluent limits to protect water quality. The treated effluent is discharged into a local stream that drains into the Kansas River basin, ultimately reaching the Missouri River and then the Mississippi River. This watershed supports diverse aquatic life and provides water for agricultural and municipal uses downstream. The plant's location inland and away from coastal areas reduces direct marine impact.

The plant discharges into a tributary of the Kansas River, which flows into the Missouri River and then the Mississippi River, eventually reaching the Gulf of Mexico. This watershed supports diverse aquatic ecosystems, including fish and migratory birds. The plant's secondary treatment helps reduce nutrient loads that could contribute to hypoxia in the Gulf, though additional nutrient removal may be needed in sensitive areas.