EDDYVILLE WWTP - Secondary Treatment Plant in Wapello County, Iowa

EDDYVILLE WWTP is a municipal wastewater treatment facility located in Wapello County, Iowa, serving a population of approximately 1,064 residents. The plant operates under the regulatory framework of the U.S. Clean Water Act, which governs wastewater discharges through the National Pollutant Discharge Elimination System (NPDES) permit program. As a secondary treatment facility, it meets the standard requirements for biological treatment of organic matter and suspended solids. The plant has a designed capacity of 2,346.95 cubic meters per day and reports an average daily discharge volume of 529.96 cubic meters. Secondary treatment typically involves biological processes such as activated sludge or trickling filters. The facility's scale places it in the small population category, for which secondary treatment is the baseline requirement under federal regulations. The treated effluent is discharged into local receiving waters within the Mississippi River basin. The plant's location in southeastern Iowa places it within a region of agricultural and rural land use, where maintaining water quality is important for downstream ecosystems. The ultimate drainage is to the Mississippi River, which supports diverse aquatic life and serves as a major water resource for the central United States.

The plant discharges into local waterways that are part of the Mississippi River basin, ultimately draining into the Gulf of Mexico. This watershed supports a variety of aquatic species and is an important migratory corridor for birds. The region's agricultural landscape means that nutrient management from wastewater is critical to prevent downstream eutrophication in the Gulf.