Evansdale WWTP - Municipal Wastewater Treatment in Evansdale, Iowa

Evansdale WWTP is a municipal wastewater treatment facility located in Evansdale, Black Hawk County, Iowa, serving a population of about 4,751. The plant is situated inland, away from coastal areas, and treats wastewater from the local community. As a small to medium-sized facility, it plays a key role in protecting local water quality. Under the U.S. Clean Water Act, the plant operates under a National Pollutant Discharge Elimination System (NPDES) permit, which sets effluent limits to safeguard receiving waters. For plants of this scale in Iowa, secondary treatment is typically required, involving biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into a nearby water body, likely a tributary of the Cedar River, which flows into the Iowa River and eventually the Mississippi River. This drainage network supports diverse aquatic life and provides water for downstream communities. The plant's operation helps maintain the ecological health of the Cedar River basin, a region known for its agricultural landscape and recreational waterways.

The plant discharges into a local water body that drains into the Cedar River, a major tributary of the Iowa River, which ultimately flows into the Mississippi River. This watershed supports diverse aquatic species and is used for recreation and agriculture. Proper treatment is essential to prevent nutrient pollution and protect downstream ecosystems.