Mullin Wastewater Treatment Plant, Texas | Small Community Facility

The Mullin wastewater treatment plant is located in Mullin, Texas, a small community in Mills County. It serves a population of approximately 60 residents, making it a very small municipal facility. The plant is situated inland, far from coastal areas, and operates under the regulatory framework of the United States Clean Water Act. The plant provides secondary treatment, which is the standard level required by the U.S. Environmental Protection Agency (EPA) for municipal wastewater. With a designed capacity of 151.42 cubic meters per day and a discharge volume matching that figure, the facility is operating at full capacity. As a small plant, it is subject to state-level permitting under the National Pollutant Discharge Elimination System (NPDES), which sets effluent limits to protect water quality. The treated effluent is discharged into local streams that are part of the Colorado River basin in Texas. This river system flows southeastward to the Gulf of Mexico, supporting diverse aquatic life and providing water for agriculture and communities downstream. The plant's proper operation is essential for maintaining the health of these water bodies.

The Mullin plant discharges into tributaries of the Colorado River in Texas, which flows into the Gulf of Mexico. This watershed supports a variety of fish and wildlife, including several species of freshwater mussels and migratory birds. The plant's secondary treatment helps reduce nutrient and organic pollutant loads, protecting downstream water quality in a region where agriculture and ranching are prevalent.