Cross Plains WWTP - Secondary Treatment Facility in Cross Plains, Texas

Cross Plains WWTP is a municipal wastewater treatment plant located in Cross Plains, Callahan County, Texas. The facility serves a population of around 1,000 people, classifying it as a small-scale treatment operation within the state's wastewater infrastructure. The plant provides secondary treatment, which is the standard level required by the US Clean Water Act for municipal wastewater. With a designed capacity of 378.54 thousand cubic meters per year and an annual discharge volume of 264.98 thousand cubic meters, the plant operates at approximately 70% capacity. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids before discharge. The treated effluent is released into local receiving waters that eventually drain into the Brazos River basin, a major river system in Texas flowing into the Gulf of Mexico. The plant plays a role in protecting downstream water quality and supporting the ecological health of the region's surface waters.

The plant discharges into local streams that are part of the Brazos River watershed. The Brazos River flows southeast across Texas and empties into the Gulf of Mexico near Freeport. This watershed supports diverse aquatic life and provides water for agriculture, industry, and recreation. The plant's secondary treatment helps reduce nutrient and pollutant loads, mitigating impacts on downstream ecosystems and the Gulf Coast.