ORAN SAN DISTRICT STP - Bremer County, Iowa Wastewater Treatment Plant

ORAN SAN DISTRICT STP is a wastewater treatment facility located in Bremer County, Iowa, United States. The plant serves a small community with a population equivalent of 100, reflecting its role in rural wastewater management. The plant provides secondary treatment, a standard level for small agglomerations under the US Clean Water Act. Its designed capacity is 75.71 units, with a current discharge volume of 37.85 units, indicating operational headroom. As a US facility, it operates under National Pollutant Discharge Elimination System (NPDES) permits issued by the Iowa Department of Natural Resources, ensuring compliance with federal water quality standards. The treated effluent is discharged into local waterways that drain into the Mississippi River basin, ultimately reaching the Gulf of Mexico. The plant's operations contribute to protecting downstream aquatic ecosystems and maintaining water quality in the region's agricultural landscape.

The plant discharges into tributaries of the Cedar River, which flows into the Iowa River and then the Mississippi River. This watershed supports diverse aquatic life and is part of the larger Mississippi River basin, which drains into the Gulf of Mexico. The plant's secondary treatment helps reduce nutrient loads that could contribute to hypoxia in the Gulf.