Carlisle County Regional STP - Kentucky Wastewater Treatment Plant

Carlisle County Regional STP is a municipal wastewater treatment facility located in Carlisle County, Kentucky, United States. The plant serves a population of approximately 2,405 residents, operating as a secondary treatment facility under the regulatory framework of the US Clean Water Act. The plant's designed capacity is 946.35 thousand gallons per day, with an average discharge volume of 476.96 thousand gallons per day. As a secondary treatment plant, it meets the standard requirements for biological treatment of wastewater before discharge. The facility is regulated under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits to protect water quality. The treated effluent is discharged into local waterways that ultimately drain into the Mississippi River basin. The plant's location in western Kentucky places it within the Mississippi River watershed, which supports diverse aquatic ecosystems and provides drinking water for millions downstream. The facility plays a key role in protecting local water quality and public health in the rural community.

The plant discharges into tributaries of the Mississippi River, which flows into the Gulf of Mexico. The Mississippi River basin is one of the largest watersheds in North America, supporting diverse aquatic life and providing critical habitat for migratory birds and fish. The plant's secondary treatment helps reduce nutrient and pollutant loads, contributing to the health of downstream ecosystems.