Onalaska WWTP - Advanced Wastewater Treatment in Onalaska, Texas

Onalaska WWTP is a municipal wastewater treatment facility located in Onalaska, Polk County, Texas. The plant serves a population of approximately 1,200 residents, providing essential sanitation services for this small community in the southeastern part of the state. The facility employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 567.81 units and an average daily discharge of 416.40 units, the plant operates well within its capacity. As a US facility, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Texas Commission on Environmental Quality (TCEQ), which set effluent limits to protect water quality. The treated effluent is discharged into a local waterway that ultimately drains into the Trinity River basin, which flows into the Gulf of Mexico. The plant's advanced treatment helps protect downstream aquatic ecosystems and supports the ecological health of the Trinity River and its tributaries.

The plant discharges into a tributary of the Trinity River, which flows through East Texas into Trinity Bay and the Gulf of Mexico. The Trinity River supports diverse aquatic life, including fish species such as catfish and bass, and provides habitat for migratory birds. The advanced treatment at Onalaska WWTP helps reduce nutrient loading, protecting downstream water quality in this ecologically important watershed.