Overview
Merrill WWTP serves 755 residents in Plymouth County, Iowa, as part of the municipal wastewater infrastructure. The plant operates under the US Clean Water Act framework.
Merrill WWTP is a municipal wastewater treatment facility located in Plymouth County, Iowa, serving a small population of 755 residents. The plant is situated in a rural area of northwestern Iowa, near the Big Sioux River watershed. As a small-scale facility in the United States, Merrill WWTP is subject to the National Pollutant Discharge Elimination System (NPDES) permit program under the Clean Water Act. The plant discharges treated wastewater into local waterways that ultimately drain into the Missouri River system. This contributes to the broader Mississippi River basin, supporting regional water quality and aquatic habitats in the area.
Environmental context
The plant's discharge enters the Big Sioux River watershed, which flows northward into the Missouri River near Sioux City. The Missouri River then joins the Mississippi River, forming a major drainage system that supports diverse aquatic life and migratory birds. The region's agricultural landscape influences local water quality through runoff, making proper wastewater treatment essential for maintaining downstream ecosystem health.
Frequently asked questions
Merrill WWTP is located on County Road C44 in Plymouth County, Iowa, United States, serving the small community of Merrill.
The plant serves a population of 755 residents in the Merrill area of Plymouth County.
The plant discharges treated effluent into local waterways within the Big Sioux River watershed, which flows into the Missouri River.
As a US facility, Merrill WWTP operates under the Clean Water Act and is regulated through the National Pollutant Discharge Elimination System (NPDES) permit program.
Small US plants like Merrill WWTP typically use secondary treatment processes, such as activated sludge or lagoon systems, to meet EPA effluent standards.
Nearby plants