NEW CASTLE STP - Secondary Wastewater Treatment Plant in New Castle, Kentucky

NEW CASTLE STP is a municipal wastewater treatment facility located in New Castle, Kentucky, serving a population of approximately 1,200 residents. The plant operates under the regulatory framework of the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater discharges to surface waters. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 1,116.69 thousand cubic meters per year, the plant treats an average annual discharge volume of 454.25 thousand cubic meters. As a small community facility, it is subject to National Pollutant Discharge Elimination System (NPDES) permitting administered by the Kentucky Division of Water. The treated effluent is discharged into a local receiving water body, likely a tributary of the Kentucky River, which flows into the Ohio River and ultimately the Mississippi River system. This watershed supports diverse aquatic life and provides drinking water for downstream communities. The plant plays a key role in protecting local water quality and public health.

The plant discharges into a local stream that drains into the Kentucky River basin, part of the larger Ohio-Mississippi River system. This watershed supports diverse aquatic habitats, including fish and macroinvertebrate communities, and provides drinking water for downstream populations. The plant's secondary treatment helps reduce nutrient and organic pollutant loads, protecting the ecological health of the receiving waters.