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Completed Survey and Assessment Projects of the TMDL Program

A list of completed projects to collect and assess data to support use attainability analyses or to determine whether a TMDL is the most appropriate strategy for improving water quality in a 303(d)-listed waterway.

Communities Working Together

The TMDL Program works to restore Texas waterways that have limited quality in relation to one or more of their assigned uses, such as recreation, fishing, or healthy aquatic environment.

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Title Description Image
Mid Cibolo Creek This completed project assessed and improved dissolved oxygen concentrations in Mid Cibolo Creek in South Central Texas to support a healthy aquatic community.
Oso Bay and the Laguna Madre This is a completed project to assess low dissolved oxygen conditions in Oso Bay and the Laguna Madre and how it affects aquatic life.
Oso Bay: Oyster Waters Use This is a completed assessment project to determine whether bacteria levels in Oso Bay could affect oyster beds in Corpus Christi Bay.
Patrick Bayou This completed project assessed the need for a total maximum daily load (TMDL) for Patrick Bayou.
Rocky Creek and Salado Creek This completed project assessed the aquatic life use and dissolved oxygen concentrations in Rocky Creek and Salado Creek in the Brazos River Basin.
Sam Rayburn Reservoir This completed project assessed whether concentrations of dissolved oxygen and pH were sufficient to support aquatic life in Sam Rayburn Reservoir and whether elevated concentrations of aluminum were harming the aquatic life community.
San Antonio River Basin, Leon River, and Peach Creek This completed project assessed the need to develop bacteria TMDLs for the San Antonio River, Salado Creek, Walzem Creek, Leon River, and Peach Creek.
San Jacinto River Tidal This completed project assessed consumer risk of legacy pollutants in fish tissue.
South Central Texas Streams This completed assessment project evaluated high bacteria and low dissolved oxygen concentrations in several streams in south central Texas and determined whether TMDLs would be required.
Surveying Recreational Uses in Texas This completed project surveyed recreational uses of several water bodies Texas.
Texas Water Bodies: Toxicity This completed project assessed the extent and severity of toxicity in ambient water and sediment in seven Texas water bodies.
Tidal Streams in Texas This completed project assessed appropriate dissolved oxygen criteria for support of aquatic life in tidal streams.
Trinity River This completed project assessed contamination by polychlorinated biphenyls (PCBs) in fish tissue in the Trinity River.
Welsh Reservoir This completed project assessed the safety of fish consumption in Welsh Reservoir.