Corrigan STP Wastewater Treatment Plant, Corrigan, Texas

Corrigan STP is a municipal wastewater treatment facility located in Corrigan, Polk County, Texas. The plant serves a population of approximately 1,650 residents, providing secondary treatment to meet state and federal water quality standards. The plant operates under the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater. With a designed capacity of 1,135.62 units and an average discharge volume of 620.81 units, the facility has capacity to accommodate future growth. Treatment processes typical for this scale include biological treatment followed by disinfection. The treated effluent is discharged into local waterways that drain into the Neches River basin, ultimately reaching the Gulf of Mexico. The plant plays a key role in protecting downstream water quality and aquatic habitats in the Piney Woods region of East Texas.

The plant discharges into tributaries of the Neches River, which flows southeast through Texas into Sabine Lake and then the Gulf of Mexico. The Neches River basin supports diverse aquatic life, including fish and migratory birds, and is part of the larger Gulf Coast ecosystem. The plant's secondary treatment helps reduce nutrient and organic loads, protecting downstream water quality.