Overview
Carlyle STP and Collection System serves approximately 3,500 residents in Carlyle, Illinois. The plant operates under the U.S. Clean Water Act, which governs wastewater treatment standards for municipal facilities.
Carlyle STP and Collection System is a municipal wastewater treatment plant located at 810 Franklin Street in Carlyle, Illinois, a small community in Clinton County. The facility serves a population of about 3,500 people, typical of a small agglomeration in the rural Midwest. As a U.S. plant, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Illinois Environmental Protection Agency. For plants of this scale, secondary treatment is the standard requirement, ensuring that organic matter and suspended solids are reduced to protect receiving waters. The plant discharges treated wastewater into a local water body that ultimately drains into the Mississippi River Basin. The downstream environment includes the Kaskaskia River, a tributary of the Mississippi, which supports diverse aquatic life and is used for recreation and agriculture.
Environmental context
The plant's treated effluent flows into a local stream that is part of the Kaskaskia River watershed, which drains into the Mississippi River. The Kaskaskia River provides habitat for fish and wildlife, including migratory birds, and is an important resource for the region's agriculture and recreation. Protecting water quality in this basin helps maintain the ecological health of the larger Mississippi River system.
Frequently asked questions
The plant is located at 810 Franklin Street in Carlyle, Illinois, in Clinton County, United States.
The facility serves approximately 3,500 residents, classifying it as a small municipal wastewater treatment plant.
The plant discharges treated effluent into a local water body that is part of the Kaskaskia River watershed, which ultimately flows into the Mississippi River.
The plant operates under the Clean Water Act and is required to have an NPDES permit issued by the Illinois EPA, which sets limits on pollutants to protect water quality.
For small municipal plants in the U.S., secondary treatment is standard, which removes at least 85% of organic matter and suspended solids before discharge.
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