Hardin Co Water District 1 Radcliff Wastewater Treatment Plant, Kentucky

Hardin Co Water District 1 Radcliff is a municipal wastewater treatment plant located in Radcliff, Hardin County, Kentucky. Serving an estimated population of 26,504, the facility is part of the region's water infrastructure managed by the Hardin County Water District. The plant is situated inland, approximately 50 kilometers from the Ohio River, which ultimately drains to the Mississippi River and the Gulf of Mexico. Under the U.S. Clean Water Act, municipal wastewater treatment plants serving populations between 10,000 and 100,000 are typically required to provide secondary treatment as a minimum standard. The Kentucky Division of Water issues National Pollutant Discharge Elimination System (NPDES) permits that govern discharge limits and monitoring requirements. Facilities of this scale commonly employ activated sludge or similar biological treatment systems to meet permit conditions. The plant's treated effluent likely discharges to a local stream or tributary within the Salt River watershed, which flows into the Ohio River. The Ohio River supports diverse aquatic life and serves as a critical drinking water source for millions downstream. Proper treatment at this facility helps protect water quality in the Ohio River basin and reduces nutrient loading to the Gulf of Mexico, where excess nutrients contribute to seasonal hypoxic zones.

The plant's discharge ultimately reaches the Ohio River via local tributaries in the Salt River basin. The Ohio River is a major tributary of the Mississippi River, which drains into the Gulf of Mexico. This watershed supports diverse fish populations and provides drinking water for numerous communities. Nutrient and pollutant control at this plant helps mitigate downstream eutrophication and protects aquatic habitats in the Mississippi River basin.