Lightwood Sewer Morehouse Parish Wastewater Treatment Plant, Twin Oaks, Louisiana

Lightwood Sewer Morehouse Parish is a municipal wastewater treatment facility located in Twin Oaks, Morehouse Parish, Louisiana. It serves a small population of 157 residents, reflecting its role as a localized treatment system for a rural community in the northeastern part of the state. The plant provides secondary treatment, which is the standard level required by the US Clean Water Act for municipal wastewater facilities. With a designed capacity of 94.64 million gallons per year, the plant operates under the National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Louisiana Department of Environmental Quality. This regulatory framework ensures that discharges meet water quality standards to protect public health and the environment. The treated effluent is discharged into local streams that drain into the Ouachita River basin, ultimately flowing to the Mississippi River and the Gulf of Mexico. The plant's operations help maintain water quality in this ecologically significant watershed, which supports diverse aquatic life and provides habitat for migratory birds along the Mississippi Flyway.

The plant discharges into tributaries of the Ouachita River, which flows south to the Mississippi River and into the Gulf of Mexico. This watershed supports a variety of fish and wildlife, including species dependent on healthy water quality. The region's flat terrain and humid subtropical climate influence runoff patterns and the ecological sensitivity of receiving waters.