Newcastle WWTP - Secondary Wastewater Treatment in Newcastle, Nebraska

Newcastle WWTP is a municipal wastewater treatment plant located on Broadway Street in Newcastle, Nebraska, serving a small population of 360 residents. The facility is situated in Dixon County, part of the rural Midwest region of the United States. The plant provides secondary treatment, which is the standard level required by the U.S. Clean Water Act for municipal facilities. Its designed capacity is 189.27 megaliters per year, with an annual discharge volume of 113.56 megaliters, indicating moderate utilization. As a small-scale plant, it is subject to National Pollutant Discharge Elimination System (NPDES) permitting overseen by the Nebraska Department of Environment and Energy. The treated effluent is discharged into a local waterway that ultimately drains into the Missouri River basin, which flows into the Mississippi River and then the Gulf of Mexico. The plant plays a key role in protecting local water quality in the region's agricultural landscape.

The plant discharges into a tributary of the Missouri River, which flows through the Great Plains and into the Mississippi River before reaching the Gulf of Mexico. The local watershed supports agricultural activities and diverse aquatic life, including fish species such as catfish and walleye. The plant's secondary treatment helps reduce nutrient loads, mitigating downstream eutrophication risks in the Gulf of Mexico's hypoxic zone.