Walnut Creek STP, Austin, Texas | Wastewater Treatment Plant Overview

Walnut Creek STP is a major wastewater treatment facility located in Austin, Texas, serving a population of 440,720. Situated in Travis County, the plant is part of the city's extensive wastewater infrastructure, handling a large agglomeration's sewage and industrial flows. As a US facility of this scale, the plant operates under the Clean Water Act, administered by the Texas Commission on Environmental Quality (TCEQ) through an NPDES permit. Such permits set effluent limits for pollutants like BOD, TSS, and nutrients, and require monitoring and reporting. For a plant serving over 400,000 people, advanced treatment is typical to protect water quality in the receiving water body. The plant discharges into the Colorado River basin, which flows southeast through Texas to the Gulf of Mexico. The river supports diverse aquatic life and provides drinking water for downstream communities. The plant's operations are critical to maintaining the ecological health of the Colorado River and its tributaries.

Walnut Creek STP discharges into the Colorado River basin, which flows through central Texas to Matagorda Bay and the Gulf of Mexico. The river supports a variety of fish and wildlife, including several species of freshwater mussels and migratory birds. Downstream ecosystems rely on adequate treatment to prevent nutrient enrichment and oxygen depletion.