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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 taking care of our rivers, lakes, and bays

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
Armand Bayou: Evaluating Water Quality for Aquatic Life A completed project to assess dissolved oxygen and support of aquatic life in Armand Bayou.
Arroyo Colorado: A Watershed Protection Plan A completed plan and assessment project to improve water quality in the Arroyo Colorado
Arroyo Colorado: Surveying Recreational Uses A completed project to evaluate recreational uses of the Arroyo Colorado
Assessing Toxicity in Ambient Water and Sediment in Seven Texas Water Bodies A completed project to assess the extent and severity of toxicity in ambient water and sediment in seven Texas water bodies.
Atascosa River: Evaluating the Aquatic Life and Recreational Uses A completed assessment project to evaluate concentrations of dissolved oxygen and bacteria in the Atascosa River in South Central Texas
Brandy Branch Reservoir: Assessing the Safety of Fish Consumption A completed project of the TMDL Program to assess the extent of contamination in fish from Brandy Branch Reservoir
Clear Fork Trinity River: Evaluating Water Quality for Aquatic Life A completed project to evaluate the attainability of the presumed aquatic life use for the Clear Fork of the Trinity River
Dickinson Bayou: Investigating Low Dissolved Oxygen Conditions A completed project to assess conditions for support of fish and other aquatic life
Elm and Sandies Creeks: Evaluating Aquatic Life and Recreational Uses A completed project to evaluate high bacteria and low dissolved oxygen concentrations in Elm and Sandies creeks in south central Texas.
Galveston Bay System: A Survey of Dioxin and PCBs A completed project to assess the distribution of dioxin and PCBs in the system.
Grace Creek: Assessing Water Quality A completed project to monitor bacteria concentrations in portions of Grace Creek and the Sabine River in Longview.
Gulf Coastal Waters: Evaluating the Safety of Oyster Harvesting in 14 Bays A completed project to evaluate the safety of oyster harvesting in 14 bays
Houston Ship Channel and Galveston Bay: Assessing Contamination from PCBs A completed project to assess sources of contamination in fish from polychlorinated biphenyls (PCBs) and evaluate options for reducing them so it is safer to eat fish from the area waterways.
Houston Ship Channel and Galveston Bay: Assessing Contamination from Dioxin A completed project to assess sources of contamination in fish from dioxin and evaluate options for reducing them so it is safer to eat fish from the area waterways.
Lampasas and Navasota Rivers: Evaluating Water Quality for Recreational Uses A completed project of the TMDL Team to survey and assess bacteria impairments of the contact recreation use in three streams in east central Texas.
Lavaca Bay and Chocolate Bay: Evaluating Water Quality for Aquatic Life A completed project to assess support of the aquatic life use in Lavaca Bay and Chocolate Bay
Lower Leon Creek: A Project to Assess Bacteria A completed project to assess the extent of impairments due to bacteria in Lower Leon Creek
Lower Leon Creek: Evaluating Water Quality to Protect Aquatic Life A completed project to collect dissolved oxygen samples in the stream and add to the data available for evaluating the aquatic life use.
Lower Leon Creek: Fish Tissue Sampling Project A completed project to assess high PCB concentrations in fish tissue in Lower Leon Creek.
Martin Creek Reservoir: Assessing the Safety of Fish Consumption A completed project to assess the safety of consuming fish from Martin Creek Reservoir
Matagorda Bay and Nearby Coastal Waters: A Project to Assess Dissolved Oxygen and pH A completed project to assess dissolved oxygen and pH in Matagorda Bay and nearby coastal waters
Mid Cibolo Creek: A Project for Dissolved Oxygen A completed project to assess and improve dissolved oxygen concentrations in Mid Cibolo Creek in South Central Texas
Oso Bay and the Laguna Madre: Assessing the Aquatic Life Use A completed project to assess low dissolved-oxygen conditions in Oso Bay and Laguna Madre
Oso Bay: A Project to Assess the Oyster Waters Use A completed assessment project to determine whether bacteria levels in Oso Bay are high enough to affect oyster beds in Corpus Christi Bay.
Patrick Bayou: Assessing Toxic Substances and Temperature A completed project to assess the need for a TMDL for Patrick Bayou.
Rocky Creek and Salado Creek: Investigating Aquatic Life Conditions A completed project to assess the aquatic life use and dissolved oxygen concentrations in Rocky Creek and Salado Creek, Brazos River Basin
Sam Rayburn Reservoir: A Project to Evaluate the Aquatic Life Use A completed project to assess whether TMDLs were necessary to improve water quality for support of aquatic life in Sam Rayburn Reservoir
San Antonio River Basin, Leon River, and Peach Creek: Evaluating Water Quality for Recreation A completed project to assess the need to develop bacteria TMDLs for the San Antonio River, Salado Creek, Walzem Creek, Leon River, and Peach Creek
San Jacinto River Tidal: A Project to Assess Legacy Pollutants in Fish A completed project to assess consumer risk from legacy pollutants in edible fish
South Central Texas Streams: Evaluating Water Quality for Aquatic Life and Recreation Completed assessment project that evaluated high bacteria and low dissolved-oxygen concentrations in several streams in south central Texas and determined whether TMDLs were required