Johnson WWTP - Secondary Treatment Plant in Johnson, Nebraska

Johnson WWTP is a municipal wastewater treatment plant located in Johnson, Nemaha County, Nebraska. It serves a small population of 280 residents, reflecting the rural character of the area. The plant is situated in the Missouri River basin, which ultimately drains to the Mississippi River and the Gulf of Mexico. The plant provides secondary treatment, which is the standard level required under the US Clean Water Act for municipal facilities. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant has a designed capacity of 113.56 million gallons per day, matching its discharge volume, indicating it operates at full capacity. The treated effluent is discharged into a local waterway that flows into the Nemaha River, a tributary of the Missouri River. This river system supports diverse aquatic life and is an important corridor for migratory fish. The plant's discharge is regulated under the National Pollutant Discharge Elimination System (NPDES) to protect water quality downstream.

The plant discharges into a tributary of the Nemaha River, which flows into the Missouri River and eventually the Mississippi River and Gulf of Mexico. This watershed supports a variety of aquatic species and is used for recreation and agriculture. The plant's secondary treatment helps reduce nutrient loading, which is important for preventing eutrophication in downstream water bodies.