MALVERN STL Wastewater Treatment Plant, Mills County, Iowa

MALVERN STL is a municipal wastewater treatment facility located in Mills County, Iowa, United States. The plant serves a small community of approximately 1,142 residents, providing essential sanitation services for the area. As a secondary treatment plant, it employs biological processes to remove organic matter and suspended solids from wastewater before discharge. The plant operates under the regulatory framework of the U.S. Clean Water Act, which requires secondary treatment as the minimum standard for municipal wastewater facilities. The National Pollutant Discharge Elimination System (NPDES) permit program governs its discharge, ensuring compliance with water quality standards. The plant's designed capacity is 624.59 volume units, matching its current discharge volume, indicating full utilization of its treatment capacity. The treated effluent from MALVERN STL is discharged into local streams that ultimately flow into the Missouri River, a major tributary of the Mississippi River system. This river network supports diverse aquatic life and provides water for agricultural, industrial, and recreational uses downstream. The plant's operations are critical for protecting water quality in the region and maintaining the ecological health of the Missouri River basin.

The plant discharges into local waterways that drain into the Missouri River, which flows through the Great Plains and joins the Mississippi River near St. Louis. The Missouri River supports a variety of fish species, including catfish and sturgeon, and provides habitat for migratory birds. The watershed is primarily agricultural, with runoff from farms contributing nutrient loads that the plant's secondary treatment helps mitigate.