Lake Charles Plant B Wastewater Treatment Facility, Louisiana

Lake Charles Plant B is a municipal wastewater treatment facility located in Lake Charles, Calcasieu Parish, Louisiana. It serves a population of approximately 50,000 residents, placing it in the medium-agglomeration category for US wastewater infrastructure. The plant is situated near the Gulf Coast, within 50 kilometers of the coast, and its operations are subject to federal and state environmental regulations. As a US facility, Lake Charles Plant B operates under the Clean Water Act, administered by the EPA and the Louisiana Department of Environmental Quality. Plants of this scale typically require secondary treatment as a minimum standard, with NPDES permits specifying effluent limits for biochemical oxygen demand, total suspended solids, and other pollutants. The designed capacity of 1.00 million gallons per day suggests the plant is sized to handle the community's wastewater flows. The plant's treated effluent is discharged into the Calcasieu River system, which flows southward into the Calcasieu Lake and eventually the Gulf of Mexico. This watershed supports diverse aquatic life, including fish and shellfish species important to local fisheries. The plant's performance is critical to maintaining water quality in this ecologically sensitive coastal region.

Lake Charles Plant B discharges into the Calcasieu River basin, which drains into Calcasieu Lake and then the Gulf of Mexico. This coastal watershed supports estuarine habitats, including marshes and wetlands that provide nursery grounds for fish and crustaceans. The region is ecologically sensitive due to its proximity to the Gulf, where nutrient loading from wastewater can contribute to algal blooms and hypoxic zones. Maintaining effective treatment is essential to protect downstream aquatic ecosystems and the recreational and commercial uses of the water bodies.