COLON LAGOON Wastewater Treatment Plant, Colon Township, Michigan

COLON LAGOON is a municipal wastewater treatment facility located in Colon Township, Saint Joseph County, Michigan, United States. The plant serves a population of about 3,513 people, classifying it as a small to medium-sized agglomeration under typical US regulatory frameworks. The facility provides secondary treatment, which is the standard level required by the US Clean Water Act for most municipal plants. With a designed capacity of 908.50 volume units and a discharge volume of 529.96 volume units, the plant operates below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local waterways that ultimately drain into the Great Lakes basin, specifically Lake Michigan. The plant plays a vital role in protecting the region's water quality by reducing pollutants before discharge, supporting aquatic life and downstream ecosystems.

The plant discharges into local streams that flow into the St. Joseph River, a major tributary of Lake Michigan. This watershed supports diverse aquatic species and provides recreational opportunities. The Great Lakes ecosystem is sensitive to nutrient pollution, making effective wastewater treatment critical for preventing algal blooms and maintaining water quality.