Crab Orchard WWTP - Johnson County, Nebraska Secondary Treatment Plant

Crab Orchard WWTP is a municipal wastewater treatment facility located in Johnson County, Nebraska, United States. The plant serves a small community of 49 residents, reflecting its role in rural wastewater management. The facility provides secondary treatment, which is the standard biological treatment process required under the U.S. Clean Water Act for most municipal plants. With a designed capacity of 30.28 megaliters per year and an actual discharge volume of 15.14 megaliters per year, the plant operates well within its capacity. The treated effluent is discharged into local waterways that ultimately drain into the Missouri River basin. As a small inland plant, it plays a key role in protecting local water quality and downstream ecosystems in the Great Plains region.

The plant discharges into tributaries of the Missouri River, which flows into the Mississippi River and eventually the Gulf of Mexico. The surrounding area is primarily agricultural, so the plant helps prevent nutrient pollution that could contribute to hypoxia in the Gulf. The local watershed supports diverse aquatic life and is part of the larger Mississippi River drainage system.