Overview
COAL CITY STP serves Coal City, Illinois, treating wastewater for approximately 4,751 residents. The plant operates under U.S. EPA and Illinois EPA regulations, discharging treated effluent to local waterways.
COAL CITY STP is a municipal wastewater treatment plant located in Coal City, Grundy County, Illinois. Serving a population of about 4,751, the facility is part of the region's infrastructure for managing domestic wastewater from the community and surrounding areas. As a small-to-medium agglomeration, the plant is subject to the U.S. Clean Water Act and National Pollutant Discharge Elimination System (NPDES) permitting requirements. The plant discharges treated wastewater to a receiving water body within the Illinois River basin, which ultimately drains to the Mississippi River and the Gulf of Mexico. The local watershed supports diverse aquatic life and is part of a larger network of rivers and streams that contribute to the ecological health of the region.
Environmental context
The plant's treated effluent enters a tributary of the Illinois River, which flows into the Mississippi River and eventually reaches the Gulf of Mexico. This watershed supports a variety of fish and wildlife species, including migratory birds and freshwater mussels. The discharge contributes to the overall nutrient load in the basin, making effective treatment important for downstream water quality and ecosystem health.
Frequently asked questions
COAL CITY STP is located at 36 East 4th Street in Coal City, Grundy County, Illinois, United States.
The plant serves approximately 4,751 residents in Coal City and the surrounding area.
The plant discharges treated effluent to a local waterway within the Illinois River basin, which flows to the Mississippi River and the Gulf of Mexico.
The plant operates under the U.S. Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Illinois Environmental Protection Agency.
Plants of this scale typically provide secondary treatment to meet EPA effluent limits for biochemical oxygen demand and total suspended solids, ensuring protection of receiving water quality.
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