Senna Hills MUD Wastewater Treatment Plant, Bastrop County, Texas

Senna Hills MUD is a municipal wastewater treatment facility located in Bastrop County, Texas, serving a small community of approximately 800 residents. The plant operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment for municipal discharges to protect water quality. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 253.62 units and an average daily discharge of 204.41 units, the facility operates below its capacity, indicating adequate headroom for current demand. The treated effluent is discharged into local waterways that ultimately drain into the Colorado River basin, which flows through central Texas to the Gulf of Mexico. The plant's operations help protect downstream aquatic ecosystems and support regional water quality goals in the Colorado River watershed.

The plant discharges into tributaries of the Colorado River in Texas, which flows southeastward through the Hill Country and coastal plains before emptying into Matagorda Bay on the Gulf of Mexico. The Colorado River supports diverse aquatic life, including several fish species and migratory birds, and its estuary provides critical nursery habitat for marine species. The plant's secondary treatment helps reduce nutrient loads that could otherwise contribute to algal blooms in the bay.