Columbia Lagoon Wastewater Treatment Plant, Columbia, Alabama

Columbia Lagoon is a municipal wastewater treatment facility located on South Koonce Street in Columbia, Houston County, Alabama. The plant serves a small population of approximately 800 residents, reflecting the rural character of the area. As a secondary treatment plant, it provides biological treatment to reduce organic pollutants and suspended solids before discharge. The plant operates under the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater. The National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Alabama Department of Environmental Management, governs its discharge. With a designed capacity of 681.37 units and an average daily flow of 492.10 units, the facility operates below its capacity, indicating room for future growth. The treated effluent is discharged into local waterways that ultimately drain into the Chattahoochee River basin, part of the larger Apalachicola-Chattahoochee-Flint River system. This river system supports diverse aquatic life and provides drinking water for downstream communities. The plant's secondary treatment helps protect water quality in this ecologically important watershed.

The plant discharges into local streams that flow into the Chattahoochee River, which forms part of the border between Alabama and Georgia. The Chattahoochee River eventually joins the Flint River to form the Apalachicola River, which empties into the Apalachicola Bay in the Gulf of Mexico. This watershed supports a variety of fish and wildlife, including several threatened and endangered species. Secondary treatment reduces nutrient loading and organic pollution, helping to maintain the ecological health of the river system.