Overview
Collinsville Lagoon is a secondary treatment plant serving 1,395 people in Collinsville, Alabama. It discharges 908.50 thousand cubic meters of treated wastewater annually.
Collinsville Lagoon is a municipal wastewater treatment facility located in Collinsville, DeKalb County, Alabama, United States. The plant serves a population of approximately 1,395 residents, making it a small-scale facility within the state's wastewater infrastructure. The plant provides secondary treatment, which is the standard level required by the U.S. Clean Water Act for municipal wastewater. With a designed capacity of 1,135.62 thousand cubic meters per year and an annual discharge volume of 908.50 thousand cubic meters, the facility operates under the National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Alabama Department of Environmental Management. The treated effluent is discharged into local waterways that ultimately drain into the Coosa River basin, part of the larger Mobile River system that flows into the Gulf of Mexico. The plant plays a key role in protecting water quality in the region, supporting downstream aquatic habitats and recreational uses.
Environmental context
The plant discharges into the Coosa River basin, which flows southwest through Alabama and joins the Alabama River to form the Mobile River, emptying into Mobile Bay and the Gulf of Mexico. This watershed supports diverse aquatic life, including several species of freshwater mussels and fish. The secondary treatment provided helps reduce nutrient and organic pollutant loads, mitigating risks of eutrophication in downstream waters.
Frequently asked questions
Collinsville Lagoon is located in Collinsville, DeKalb County, Alabama, United States.
The plant serves a population of approximately 1,395 residents.
The treated effluent is discharged into local waterways within the Coosa River basin, which ultimately drains into the Gulf of Mexico via the Mobile River system.
The plant operates under the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater. Discharge permits are issued under the National Pollutant Discharge Elimination System (NPDES) by the Alabama Department of Environmental Management.
For small communities in the U.S., secondary treatment is the standard requirement under the Clean Water Act. Many such facilities use lagoon systems or other low-energy biological processes to meet effluent limits.
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