Eldorado WWTP and Sewer System - Advanced Treatment Plant in Eldorado, Ohio

Eldorado WWTP and Sewer System is a municipal wastewater treatment facility located in Eldorado, Preble County, Ohio. Serving a small population of 543, the plant provides advanced treatment to protect local water quality. The facility is situated inland, far from coastal areas, and its operations are regulated under the US Clean Water Act through state-issued NPDES permits. The plant has a designed capacity of 378.54 cubic meters per day and currently discharges a similar volume, indicating full utilization. Advanced treatment processes are employed, which typically include nutrient removal and disinfection, ensuring high effluent quality. For small agglomerations in the US, such treatment levels often exceed minimum requirements, reflecting a commitment to environmental stewardship. The treated effluent is discharged into local waterways within the Great Miami River watershed, which ultimately drains into the Ohio River and then the Mississippi River. This system supports diverse aquatic life and provides drinking water for downstream communities. The plant's advanced treatment helps minimize nutrient loading and protect the ecological health of these receiving waters.

The plant discharges into tributaries of the Great Miami River, which flows into the Ohio River and eventually the Mississippi River. This watershed supports diverse aquatic species and provides habitat for migratory fish. The advanced treatment reduces nutrient and pollutant loads, helping to maintain water quality in downstream ecosystems, including the Mississippi River Delta.