Villisca WWTP - Secondary Treatment Plant in Villisca, Iowa

Villisca WWTP is a municipal wastewater treatment facility located on East 9th Street in Villisca, Montgomery County, Iowa. The plant serves a population of about 1,252 residents, classifying it as a small community system under U.S. regulatory frameworks. The facility provides secondary treatment, which is the standard level required by the U.S. Clean Water Act for municipal plants. With a designed capacity of 1,699.64 cubic meters per day and an average discharge volume of 757.08 cubic meters per day, the plant operates well within its capacity. Treatment processes typical for this scale include biological treatment followed by sedimentation and disinfection. The treated effluent is discharged to local streams that drain into the East Nishnabotna River, a tributary of the Missouri River system. This watershed supports agricultural drainage and provides habitat for fish and wildlife. The plant's operation helps protect downstream water quality in the Missouri River basin.

Villisca WWTP discharges into local waterways that flow to the East Nishnabotna River, part of the Missouri River watershed. The Missouri River ultimately drains into the Mississippi River and the Gulf of Mexico. The region's aquatic ecosystems support diverse species, including fish and migratory birds, and the plant's secondary treatment reduces nutrient and organic loads that could otherwise contribute to downstream eutrophication.