Overview
MARSEILLES STP serves 4,600 residents in Marseilles, Illinois. The plant discharges treated wastewater into the Illinois River basin, supporting local water quality in the Mississippi River watershed.
MARSEILLES STP is a municipal wastewater treatment facility located in Marseilles, Illinois, United States. The plant serves a population of approximately 4,600 people, making it a small-scale treatment facility within the state's wastewater infrastructure. As a US-based plant, MARSEILLES STP operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permitting requirements. For small agglomerations like this, secondary treatment is typically mandated to meet water quality standards before discharge. The plant's treated effluent is discharged into the Illinois River basin, which flows into the Mississippi River and ultimately reaches the Gulf of Mexico. This watershed supports diverse aquatic life and is an important migratory corridor for fish and birds.
Environmental context
The plant discharges into the Illinois River basin, a major tributary of the Mississippi River. The downstream environment includes the Mississippi River and the Gulf of Mexico, which supports a large marine ecosystem. The watershed is ecologically sensitive, providing habitat for fish, waterfowl, and other aquatic species.
Frequently asked questions
MARSEILLES STP is located at 878 Canal Street, Marseilles, LaSalle County, Illinois, United States.
The plant serves approximately 4,600 residents in the Marseilles area.
The plant discharges treated wastewater into the Illinois River basin, which flows into the Mississippi River and eventually the Gulf of Mexico.
As a US facility, MARSEILLES STP operates under the Clean Water Act and is subject to NPDES permits issued by the Illinois Environmental Protection Agency, which set limits on pollutant discharges.
For small agglomerations in the US, secondary treatment is standard to meet water quality standards, often involving biological processes to remove organic matter and solids.
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