Moulton WWTP - Secondary Treatment Plant in Hallettsville, Texas

Moulton WWTP is a municipal wastewater treatment facility located in Hallettsville, Lavaca County, Texas. The plant serves a population of approximately 1,000 residents and operates as part of the region's water 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 454.25 m³/day and an average discharge volume of 378.54 m³/day, the facility operates below its capacity, indicating room for future growth. The treated effluent is discharged into local waterways that ultimately drain into the Lavaca River basin and then to the Gulf of Mexico. The plant plays a key role in protecting downstream water quality and supporting the ecological health of the region's aquatic habitats.

The plant discharges into the Lavaca River watershed, which flows southeast through Texas and empties into Lavaca Bay, an estuary of the Gulf of Mexico. This coastal basin supports diverse aquatic life, including fish and shellfish, and is an important migratory corridor for birds. The secondary treatment provided helps reduce nutrient and pollutant loads, protecting the sensitive estuarine environment downstream.