Elwood Community SD Wastewater Treatment Plant, Elwood, Iowa

Elwood Community SD is a municipal wastewater treatment facility located on 130th Street in Elwood, Clinton County, Iowa. The plant serves a small population of 221 residents, reflecting the rural character of the community. As a secondary treatment plant, it provides biological treatment to reduce organic pollutants and suspended solids before discharge. The plant operates under the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater. With a designed capacity of 189.27 cubic meters per day and an average discharge volume of 75.71 cubic meters per day, the facility has capacity to accommodate future growth. The plant is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Iowa Department of Natural Resources, ensuring compliance with water quality standards. The treated effluent is discharged into a local waterway that drains into the Mississippi River basin. This region supports diverse aquatic life and is part of a larger watershed that ultimately reaches the Gulf of Mexico. The plant's secondary treatment helps protect downstream ecosystems by reducing nutrient and pollutant loads.

The plant discharges into a local tributary of the Mississippi River, which flows through the Upper Mississippi River basin. This watershed supports a variety of fish and wildlife, including migratory birds and freshwater mussels. The Mississippi River eventually empties into the Gulf of Mexico, where nutrient pollution from upstream sources can contribute to hypoxic zones. Secondary treatment at Elwood Community SD helps mitigate this impact by reducing organic and nutrient loads.