Duncan WWTP - Secondary Treatment Plant in Platte County, Nebraska

Duncan WWTP is a municipal wastewater treatment plant located in Platte County, Nebraska, serving a small population of 359 residents. The facility is situated in the rural agricultural landscape of eastern Nebraska, within the Platte River watershed. The plant provides secondary treatment, which is the standard level required by the US Clean Water Act for municipal facilities of this scale. With a designed capacity of 151.42 megaliters and an annual discharge volume of 132.49 megaliters, the plant operates at a high utilization rate. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids before discharge. The treated effluent is discharged into local waterways that ultimately drain into the Platte River, a major tributary of the Missouri River system. The Platte River supports diverse aquatic life and provides critical habitat for migratory birds along the Central Flyway. The plant's operations are regulated under the National Pollutant Discharge Elimination System (NPDES) permit program to protect downstream water quality.

The plant discharges into the Platte River basin, which flows eastward to join the Missouri River near Omaha. The Platte River is a shallow, braided river that supports important riparian habitats and serves as a key stopover for sandhill cranes and other migratory waterfowl. Downstream, the Missouri River feeds into the Mississippi River system, eventually reaching the Gulf of Mexico. The plant's secondary treatment helps reduce nutrient and organic loads to protect these interconnected aquatic ecosystems.