Butler Co Upper Mill Creek WWTP - Municipal Wastewater Treatment in Butler County, Ohio

Butler Co Upper Mill Creek WWTP is a municipal wastewater treatment facility located in West Chester Township, Butler County, Ohio, serving a population of approximately 72,774 residents. The plant is part of the region's wastewater infrastructure, managing effluent from residential and commercial sources in the growing suburban area north of Cincinnati. As a medium-to-large agglomeration, the plant operates under the U. S. Clean Water Act, which requires secondary treatment as a minimum standard for municipal wastewater facilities. The National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Ohio Environmental Protection Agency, governs discharge limits and monitoring requirements to protect water quality in receiving streams. The plant's treated effluent flows into Mill Creek, a tributary of the Great Miami River, which ultimately drains into the Ohio River. This watershed supports diverse aquatic life and provides drinking water for downstream communities. The plant's location in an urbanizing area underscores the importance of effective nutrient removal and stormwater management to prevent eutrophication and maintain ecological balance in the receiving waters.

The plant discharges into Mill Creek, a tributary of the Great Miami River, which flows into the Ohio River. The Great Miami River watershed supports diverse aquatic species and provides habitat for fish and macroinvertebrates. Downstream, the Ohio River is a major drinking water source and ecological corridor. Effective treatment at this plant helps protect water quality in a region experiencing suburban growth and associated non-point source pollution pressures.