LEWISTON WWTP - Secondary Wastewater Treatment in Lewiston, Nebraska

LEWISTON WWTP serves the small community of Lewiston in Pawnee County, Nebraska. This publicly owned treatment works handles municipal wastewater for approximately 86 residents, reflecting the rural character of the area. The plant provides secondary treatment, which is the standard level required by the U.S. Clean Water Act for municipal wastewater facilities. With a designed capacity of 41.64 thousand cubic meters per year and an actual discharge volume of 30.28 thousand cubic meters per year, the plant operates below its capacity, indicating room for future growth. Treated effluent from the plant is discharged into local waterways that ultimately drain into the Missouri River basin. The plant plays a key role in protecting downstream water quality in the Big Nemaha River watershed, supporting aquatic life and recreational uses in the region.

The plant discharges into a tributary of the Big Nemaha River, which flows into the Missouri River and eventually the Mississippi River. The watershed supports diverse aquatic species and is used for agriculture and recreation. Proper treatment helps prevent nutrient pollution and protects downstream ecosystems.