Overview
Peoria STP serves approximately 163,850 people in Peoria, Illinois. The plant discharges treated wastewater into the Illinois River, a major tributary of the Mississippi River.
Peoria STP is a municipal wastewater treatment plant located in Peoria, Illinois, serving a population of about 163,850. The plant is situated along the Illinois River, which flows through the city and is a key waterway in the region. As a large agglomeration under the US Clean Water Act, the plant is expected to provide at least secondary treatment to meet National Pollutant Discharge Elimination System (NPDES) permit requirements. Facilities of this scale typically employ secondary treatment with disinfection. The US Environmental Protection Agency (EPA) and the Illinois Environmental Protection Agency regulate discharges through NPDES permits, which set effluent limits for pollutants such as biochemical oxygen demand (BOD), total suspended solids (TSS), and nutrients. Compliance with these limits ensures protection of the receiving water body. The treated effluent from Peoria STP is discharged into the Illinois River, which flows southwest to join the Mississippi River near Grafton, Illinois. The Illinois River supports diverse aquatic life, including fish species like bass and catfish, and is an important migratory corridor for waterfowl. The plant's discharge must be managed to prevent eutrophication and maintain water quality downstream, particularly in the Mississippi River basin.
Environmental context
Peoria STP discharges into the Illinois River, a major tributary of the Mississippi River. The Illinois River basin supports a variety of aquatic habitats and is home to species such as the Illinois River mucket mussel. Downstream, the Mississippi River carries the combined flows to the Gulf of Mexico, where nutrient loading contributes to the hypoxic zone. The plant's nutrient removal performance is critical for reducing downstream impacts.
Frequently asked questions
Peoria STP is located at 2421 South Darst Street in Peoria, Illinois, United States.
Peoria STP serves approximately 163,850 people in the Peoria area.
Peoria STP discharges treated effluent into the Illinois River, which flows into the Mississippi River and eventually to the Gulf of Mexico.
Peoria STP operates under the US Clean Water Act, with discharge regulated by an NPDES permit issued by the Illinois Environmental Protection Agency.
Plants of this scale typically provide secondary treatment with disinfection, and may include nutrient removal to meet water quality standards.
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