Approved TMDLs and Implementation Plans
Information about TMDLs and implementation plans approved by the commission. EPA approval of TMDLs may be pending.
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Aquilla Reservoir
Pollution from atrazine
successfully reduced
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The TMDL Program works to improve water quality in impaired or threatened water bodies in Texas. These projects have been adopted by the TCEQ and submitted to the Environmental Protection Agency (EPA) for review. Final approval from EPA may be pending.
A TMDL and its implementation plan are developed to restore the full use of a water body that has limited quality in relation to one or more of its uses. One TMDL is required for each impairment listed in each water body.
An impairment is the combination of the use that is affected (such as support of aquatic life) with the pollutant or condition of concern (such as selenium or low dissolved oxygen). For example, if Jones Creek was listed as not attaining the aquatic life use because of low dissolved oxygen concentrations, and not attaining the fish consumption use because of selenium in fish tissue, two TMDLs would be required for Jones Creek (one for dissolved oxygen and one for selenium).
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Featured Items:
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Summary Table of Completed TMDLs and Implementation Plans
Completed load allocations and implementation plans, with dates of adoption and approval by the commission and the EPA |
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TMDLs and How They Are Implemented
What total maximum daily loads (TMDLs) are, how they are developed and implemented, and how the state evaluates the water quality of rivers, lakes, and estuaries. |
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Topics Under This Category:
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Aquilla Reservoir: A TMDL Project for Atrazine
Adopted TMDLs and an approved Implementation Plan to reduce atrazine and improve water quality in Aquilla Reservoir |
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Arroyo Colorado: A TMDL Project for Legacy Pollutants and Organics
A project to address impairments to surface water quality due to legacy pollutants and organics |
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Arroyo Colorado: A Watershed Protection Plan
A completed plan to improve water quality in the Arroyo Colorado |
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Buffalo and Whiteoak Bayous: A TMDL Project for Bacteria
A current project to reduce bacteria and improve water quality in Buffalo and Whiteoak Bayous |
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Clear Creek Above Tidal: A TMDL Project for Total Dissolved Solids and Chloride
A completed project to develop and implement total maximum daily loads for total dissolved solids and chloride in Clear Creek Above Tidal |
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Clear Creek: A TMDL Project for Volatile Organic Compounds
A completed total maximum daily load project to reduce pollution from volatile organic compounds (VOCs). |
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Clear Creek: A TMDL Project for Bacteria
A current project to develop and implement TMDLs that improve water quality |
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Clear Creek: A TMDL Project for Chlordane
A completed total maximum daily load project to address reduce chlordane in fish. |
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Colorado River Below E.V. Spence Reservoir and Petronila Creek: A TMDL Project for Total Dissolved Solids
A completed project for bacteria, dissolved oxygen, and pH in the Colorado River below E.V. Spence Reservoir and Petronila Creek. |
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Cottonwood Branch and Grapevine Creek: A TMDL Project for Bacteria
A current project to develop and implement TMDLs that improve water quality |
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Dallas and Tarrant Counties: A TMDL Project for Legacy Pollutants
Information about the total maximum daily load (TMDL) project to reduce legacy pollutant loads in streams and rivers in Dallas and Tarrant Counties. |
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E.V. Spence Reservoir: A TMDL Project for Total Dissolved Solids and Sulfate
A completed project to improve water quality by reducing total dissolved solids (TDS) and sulfate in E.V. Spence Reservoir |
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Fort Worth Area: A TMDL Project for Legacy Pollution
A project reduce legacy pollutants by developing and implementing total maximum daily loads |
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Gilleland Creek: A TMDL Project for Bacteria
A project to improve water quality by reducing bacteria in Gilleland Creek. The TMDL is adopted and the I-Plan is approved. |
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Guadalupe River Above Canyon Lake: A TMDL Project for Bacteria
A completed project to develop and implement TMDLs for bacteria. The TMDL is adopted and the I-Plan is approved. |
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Houston Metropolitan Area: A TMDL Project for Bacteria
A current project to improve water quality by developing and implementing TMDLs for Brays, Greens, Halls, and Sims Bayous and streams in Eastern Houston |
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Houston Ship Channel: A TMDL Project for Nickel
A project to limit nickel concentrations in the Houston Ship Channel. |
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Lake Austin - A TMDL Project for Dissolved Oxygen
A project to improve water quality by increasing dissolved oxygen in Lake Austin |
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Lake Houston Watersheds: A TMDL Project for Bacteria
A current project to develop and implement TMDLs that reduce bacteria concentrations in several watersheds upstream of Lake Houston. The TMDLs are adopted; the I-Plan is in development. |
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Lake O' the Pines: A TMDL Project for Dissolved Oxygen
A project to improve conditions for fish and other aquatic life in Lake O' the Pines. The TMDL is adopted and the I-Plan is approved. |
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Lake Worth: A TMDL Project for PCBs in Fish Tissue
A project to improve water quality by reducing polychlorinated biphenyls (PCBs) in Lake Worth |
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Lower Sabinal River: A TMDL Project for Nitrate-Nitrogen
A project to improve water quality in the Lower Sabinal River. The TMDL is adopted and the implementation plan is approved. |
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Lower San Antonio River: A TMDL Project for Bacteria
A current project to develop and implement TMDLs that reduce bacteria concentrations |
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North Bosque River: A TMDL Project for Phosphorus
A project to improve water quality by developing and implementing TMDLs. The TMDLs are adopted and the I-Plan is approved. |
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Nueces Bay: A TMDL Project for Zinc
A completed project to develop and implement TMDLs to reduce zinc in oyster harvesting waters. |
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Orange County Watersheds: A TMDL Project for Bacteria, Dissolved Oxygen, and pH
A current project to develop and implement TMDLs. The TMDLs are adopted. The I-Plan is in development. |
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Salado Creek: A TMDL Project for Dissolved Oxygen
A project to improve water quality by increasing dissolved oxygen in Salado Creek |
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Summary Table of Completed TMDLs and Implementation Plans
Completed load allocations and implementation plans, with dates of adoption and approval by the commission and the EPA |
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Upper Coast Oyster Waters: A TMDL Project for Bacteria
A current project to develop and implement TMDLs that reduce bacteria in oyster waters |
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Upper Oyster Creek: A TMDL Project for Bacteria and Dissolved Oxygen
A current project to develop and implement TMDLs. TMDLs are adopted. I-Plan is in development. |
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Upper San Antonio River: A TMDL Project for Bacteria
A current project to develop and implement TMDLs that reduce bacteria concentrations |
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Upper Trinity River: A TMDL Project for Bacteria
A current TMDL project to reduce bacteria in portions of the Upper Trinity River |
