Council Hill WWT - Secondary Wastewater Treatment in McIntosh County, Oklahoma

Council Hill WWT is a municipal wastewater treatment facility located in McIntosh County, Oklahoma, United States. The plant serves a small population of 158 residents, reflecting its role in a rural community. It operates under the regulatory framework of the US Clean Water Act, which governs wastewater discharges through the National Pollutant Discharge Elimination System (NPDES) permit program. The plant provides secondary treatment, a standard level required for most municipal facilities in the US to reduce organic matter and suspended solids. Its designed capacity is 60.57 units, with an actual discharge volume of 37.85 units, indicating operational headroom. As a small-scale plant, it is subject to state-level oversight by the Oklahoma Department of Environmental Quality. The treated effluent is discharged into a local waterway within the Arkansas River basin, which ultimately drains into the Mississippi River and the Gulf of Mexico. The plant's operations help protect downstream aquatic ecosystems and maintain water quality in the region's surface waters.

The plant discharges into a tributary of the Arkansas River system, which flows through Oklahoma and Arkansas before joining the Mississippi River. This watershed supports diverse aquatic life and provides habitat for fish and migratory birds. The plant's secondary treatment helps reduce nutrient and pollutant loads, contributing to the ecological health of the downstream rivers and the Gulf of Mexico.