Davis City WWTP - Secondary Treatment Plant in Davis City, Iowa

Davis City WWTP is a municipal wastewater treatment plant located in Davis City, Decatur County, Iowa. It serves a small population of 257 residents, reflecting the rural character of the area. The plant is situated in the Midwestern United States, a region with a continental climate and extensive agricultural activity. The plant provides secondary treatment, which is the standard level required by the US Clean Water Act for municipal facilities. With a designed capacity of 113.56 million gallons per year and a similar discharge volume, the plant operates at near-full capacity. As a small facility, it is subject to EPA NPDES permitting, typically administered by the Iowa Department of Natural Resources, ensuring compliance with water quality standards. The treated effluent is discharged into a local water body, likely a tributary of the Mississippi River basin, which ultimately drains to the Gulf of Mexico. The plant plays a key role in protecting local streams and groundwater from untreated sewage, supporting aquatic life and downstream water quality in the region's agricultural landscape.

The plant discharges into a local stream within the Mississippi River basin, which flows southward to the Gulf of Mexico. This watershed supports diverse aquatic species and is part of a larger network of rivers and wetlands that provide critical habitat for fish and migratory birds. The region's agricultural runoff can contribute nutrient loads, making the plant's secondary treatment important for reducing biochemical oxygen demand and suspended solids.