OCEA KSR WWTP - La Grange, Kentucky Wastewater Treatment Plant

OCEA KSR WWTP is a municipal wastewater treatment facility located in La Grange, Kentucky, within Oldham County. The plant serves a population of approximately 5,100 people, placing it in the small-to-medium agglomeration category under US regulatory frameworks. As a US facility, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Kentucky Division of Water. For plants of this scale, secondary treatment is typically required, with additional nutrient controls if discharging into sensitive watersheds. The plant's treated effluent enters local streams that flow into the Ohio River, a major tributary of the Mississippi River system. The Ohio River supports diverse aquatic life and provides drinking water for millions downstream. Proper treatment helps protect water quality in this ecologically and economically significant basin.

The plant discharges into tributaries of the Ohio River, which flows westward to join the Mississippi River and ultimately the Gulf of Mexico. The Ohio River basin supports diverse fish populations and is an important migratory corridor for birds. Maintaining nutrient removal standards helps prevent algal blooms in the Gulf of Mexico hypoxic zone.