Argyle Wastewater Treatment Plant, Iowa - Small Community Facility

The Argyle wastewater treatment plant is a small municipal facility located in Argyle, Lee County, Iowa, serving a population of 47. The plant provides secondary treatment, a standard level for small communities in the United States, ensuring basic removal of organic matter and suspended solids before discharge. With a designed capacity of 22.71 cubic meters per day and a similar discharge volume, the plant operates at near full capacity. As a US facility, it is subject to the Clean Water Act and National Pollutant Discharge Elimination System (NPDES) permitting, which sets effluent limits to protect water quality. The plant's treatment process is typical for small agglomerations, often using lagoons or mechanical systems. The treated effluent is discharged into local waterways that drain into the Mississippi River basin, eventually reaching the Gulf of Mexico. This downstream connection highlights the plant's role in regional water quality, as nutrients and pollutants from small plants can contribute to larger-scale issues like hypoxia in the Gulf.

The plant discharges into tributaries of the Mississippi River, which flows into the Gulf of Mexico. The Mississippi River basin supports diverse aquatic life and is a critical migratory corridor for fish and birds. The Gulf of Mexico experiences seasonal hypoxic zones, making nutrient management from all upstream sources, including small treatment plants, ecologically significant.