CLAY STP - Secondary Wastewater Treatment Plant in Webster County, Kentucky

CLAY STP is a municipal wastewater treatment facility located in Webster County, Kentucky, United States. The plant serves a small population of about 1,574 residents, reflecting its role in a rural or small-town community within the state. The plant provides secondary treatment, which is the standard level required by the U.S. Clean Water Act for municipal wastewater facilities. Secondary treatment typically involves biological processes to remove organic matter and suspended solids. The plant has a designed capacity of 757.08 thousand gallons per day and currently discharges 302.83 thousand gallons per day, indicating it operates well below its capacity. The treated effluent is discharged into a local waterway, contributing to the watershed of the Green River or Tradewater River basin, which ultimately flows into the Ohio River and then the Mississippi River. This downstream connection highlights the plant's role in protecting water quality in the broader Mississippi River system, which supports diverse aquatic life and is a major drinking water source.

The plant discharges into a tributary of the Green River or Tradewater River, both part of the Ohio River basin. The Ohio River flows into the Mississippi River, which drains into the Gulf of Mexico. The local watershed supports diverse aquatic species and is important for regional water quality. The plant's secondary treatment helps reduce nutrient and organic pollutant loads, protecting downstream ecosystems.