Moline North Slope Sewage Wastewater Treatment Plant, Rock Island, Illinois

Moline North Slope Sewage is a municipal wastewater treatment plant located in Rock Island, Illinois, United States. It serves a population of approximately 25,202 people, placing it in the medium-agglomeration category for US regulatory purposes. The plant is situated inland, away from coastal areas, and its operations are governed by state and federal environmental regulations. As a US facility, the plant operates under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets discharge limits and monitoring requirements to protect water quality. The plant's capacity and discharge volume are not publicly reported, but its population served indicates a moderate-scale operation. The plant discharges treated effluent into local waterways that ultimately drain into the Mississippi River basin. This region supports diverse aquatic life and is an important corridor for migratory fish species. The plant's performance is critical to maintaining water quality in downstream ecosystems, including the Mississippi River and the Gulf of Mexico.

The plant's treated effluent flows into tributaries of the Mississippi River, which drains into the Gulf of Mexico. The Mississippi River basin supports a wide range of aquatic species and is a major migratory route for birds and fish. Nutrient loading from wastewater can contribute to hypoxic zones in the Gulf, making effective treatment essential for downstream ecological health.