Overview
MOKENA STP serves approximately 7,700 residents in Mokena, Illinois. The plant operates under U.S. Clean Water Act regulations, with a designed capacity of 1.00 million gallons per day.
MOKENA STP is a municipal wastewater treatment facility located in Mokena, Illinois, a village in Will County approximately 35 miles southwest of Chicago. The plant serves a population of about 7,700 people, reflecting a small to medium-sized community within the greater Chicago metropolitan area. As a U.S. facility, MOKENA STP operates under the Clean Water Act, administered by the Illinois Environmental Protection Agency (IEPA) through the National Pollutant Discharge Elimination System (NPDES) permit program. The plant has a designed capacity of 1.00 million gallons per day, which is typical for a community of this size. Treatment processes are expected to meet secondary treatment standards as required by federal regulations. The plant discharges treated effluent to a local waterway, likely a tributary of the Des Plaines River or the Kankakee River system, which ultimately flows into the Illinois River and then the Mississippi River. This drainage network supports diverse aquatic life and provides water resources for downstream communities and ecosystems.
Environmental context
The treated effluent from MOKENA STP enters a local stream within the Upper Illinois River Basin, which drains into the Des Plaines River, then the Illinois River, and finally the Mississippi River. This watershed supports a variety of fish and wildlife, including migratory birds along the Mississippi Flyway. The plant's discharge contributes to the base flow of local streams, which is important for maintaining aquatic habitat during dry periods.
Frequently asked questions
MOKENA STP is located on Creekside Lane in Mokena, Will County, Illinois, United States.
MOKENA STP serves approximately 7,700 residents in the village of Mokena and surrounding areas.
The plant discharges treated effluent to a local stream within the Upper Illinois River Basin, which flows into the Des Plaines River and ultimately the Mississippi River.
MOKENA STP operates under the U.S. Clean Water Act and is regulated by the Illinois Environmental Protection Agency through an NPDES permit, which sets limits on pollutant discharges.
For a community of this size, secondary treatment is standard under the Clean Water Act, typically involving biological processes to remove organic matter and suspended solids.
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