Mediapolis STL Wastewater Treatment Plant, Mediapolis, Iowa

Mediapolis STL is a municipal wastewater treatment plant located in Mediapolis, Iowa, United States. The facility serves a population of approximately 1,637 residents and is part of the local infrastructure managed by the city. As a secondary treatment plant, it provides biological treatment to remove organic matter and suspended solids from wastewater before discharge. The plant operates under the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater facilities. Under the National Pollutant Discharge Elimination System (NPDES), the plant must obtain a permit that sets effluent limits to protect water quality. The designed capacity of 757.08 cubic meters per day indicates the plant's ability to handle the community's wastewater flow. The treated effluent is discharged into local waterways that ultimately drain into the Mississippi River basin. The plant plays a key role in protecting the region's water resources by reducing pollutant loads before discharge. The surrounding area is primarily agricultural, and the plant helps maintain the ecological health of downstream aquatic habitats.

The plant discharges into local streams that flow into the Mississippi River, a major waterway that drains into the Gulf of Mexico. The Mississippi River basin supports diverse aquatic life and is an important migratory corridor for fish and birds. The plant's secondary treatment helps reduce nutrient and organic pollution, contributing to the overall health of the downstream ecosystem.