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List of Segments with TMDLs
(In numerical order by segment number)
The TCEQ must consider all TMDLs that have been adopted by the commission and approved by the U.S. EPA in all permits it issues under the Texas Pollutant Discharge Elimination System (TPDES). The TCEQ must also consider the most recent
Index of All Water Quality Impairments when developing and issuing a permit to discharge to waters of the state.
Learn more about impaired waters and the status of surface water quality in the state's Integrated Report of Surface Water Quality.
Segment Number |
Parameters |
Project Name |
0403 |
Dissolved Oxygen |
Lake O’ the Pines |
0508 |
Bacteria, Dissolved Oxygen |
Orange County Watersheds |
0508A |
Dissolved Oxygen, Bacteria |
Orange County Watersheds |
0508B |
Dissolved Oxygen, Bacteria |
Orange County Watersheds |
0508C |
Dissolved Oxygen, Bacteria |
Orange County Watersheds |
0511 |
Bacteria, Dissolved Oxygen, pH |
Orange County Watersheds |
0511A |
Dissolved Oxygen |
Orange County Watersheds |
0511B |
Dissolved Oxygen, Bacteria |
Orange County Watersheds |
0511C |
Dissolved Oxygen, Bacteria |
Orange County Watersheds |
0511E |
Bacteria |
Orange County Watersheds |
0603A |
Bacteria |
Sandy Creek and Wolf Creek |
0603B |
Bacteria |
Sandy Creek and Wolf Creek |
0704 |
Bacteria |
Hillebrandt Bayou |
0805 |
Chlordane in fish tissue Bacteria |
Dallas & Tarrant County Legacy Pollutants & Greater Trinity Region |
0806 |
Chlordane in fish tissue |
Fort Worth Legacy Pollutants |
0806A |
Chlordane, DDE, Dieldrin, and PCBs in fish tissue |
Fort Worth Legacy Pollutants |
0806B |
PCBs in fish tissue |
Fort Worth Legacy Pollutants |
0806E |
Bacteria |
Greater Trinity Region |
0807 |
PCBs in fish tissue |
Lake Worth Watershed |
0808 |
PCBs in fish tissue |
Lake Worth Watershed |
0822A |
Bacteria |
Greater Trinity Region |
0822B |
Bacteria |
Greater Trinity Region |
0829 |
Chlordane in fish tissue |
Fort Worth Legacy Pollutants |
0829A |
Chlordane, DDE, Dieldrin, and PCBs in fish tissue |
Fort Worth Legacy Pollutants |
0841 |
Chlordane in fish tissue Bacteria |
Dallas & Tarrant County Legacy Pollutants & Greater Trinity Region |
0841A |
Chlordane, Dieldrin, DDE, DDT, Heptachlor Epoxide, and PCBs in fish tissue |
Dallas & Tarrant County Legacy Pollutants |
0841B |
Bacteria |
Greater Trinity Region |
0841C |
Bacteria |
Greater Trinity Region |
0841E |
Bacteria |
Greater Trinity Region |
0841F |
Bacteria |
Greater Trinity Region |
0841G |
Bacteria |
Greater Trinity Region |
0841H |
Bacteria |
Greater Trinity Region |
0841J |
Bacteria |
Greater Trinity Region |
0841K |
Bacteria |
Greater Trinity Region |
0841L |
Bacteria |
Greater Trinity Region |
0841M |
Bacteria |
Greater Trinity Region |
0841N |
Bacteria |
Greater Trinity Region |
0841P |
Bacteria |
Greater Trinity Region |
0841Q |
Bacteria |
Greater Trinity Region |
0841R |
Bacteria |
Greater Trinity Region |
0841T |
Bacteria |
Greater Trinity Region |
0841U |
Bacteria |
Greater Trinity Region |
0841V |
Bacteria |
Greater Trinity Region |
1002 |
Bacteria |
Houston-Galveston Region |
1003 |
Bacteria |
Houston-Galveston Region |
1004 |
Bacteria |
Houston-Galveston Region |
1004D |
Bacteria |
Houston-Galveston Region |
1004E |
Bacteria |
Houston-Galveston Region |
1006D |
Bacteria |
Houston-Galveston Region |
1006F |
Bacteria |
Houston-Galveston Region |
1006H |
Bacteria |
Houston-Galveston Region |
1006I |
Bacteria |
Houston-Galveston Region |
1006J |
Bacteria |
Houston-Galveston Region |
1007A |
Bacteria |
Houston-Galveston Region |
1007B |
Bacteria |
Houston-Galveston Region |
1007C |
Bacteria |
Houston-Galveston Region |
1007D |
Bacteria |
Houston-Galveston Region |
1007E |
Bacteria |
Houston-Galveston Region |
1007F |
Bacteria |
Houston-Galveston Region |
1007G |
Bacteria |
Houston-Galveston Region |
1007H |
Bacteria |
Houston-Galveston Region |
1007I |
Bacteria |
Houston-Galveston Region |
1007K |
Bacteria |
Houston-Galveston Region |
1007L |
Bacteria |
Houston-Galveston Region |
1007M |
Bacteria |
Houston-Galveston Region |
1007N |
Bacteria |
Houston-Galveston Region |
1007O |
Bacteria |
Houston-Galveston Region |
1007R |
Bacteria |
Houston-Galveston Region |
1007S |
Bacteria |
Houston-Galveston Region |
1007T |
Bacteria |
Houston-Galveston Region |
1007U |
Bacteria |
Houston-Galveston Region |
1007V |
Bacteria |
Houston-Galveston Region |
1007W |
Bacteria |
Houston-Galveston Region |
1008 |
Bacteria |
Houston-Galveston Region |
1008B |
Bacteria |
Houston-Galveston Region |
1008C |
Bacteria |
Houston-Galveston Region |
1008E |
Bacteria |
Houston-Galveston Region |
1008H |
Bacteria |
Houston-Galveston Region |
1008I |
Bacteria |
Houston-Galveston Region |
1008J |
Bacteria |
Houston-Galveston Region |
1009 |
Bacteria |
Houston-Galveston Region |
1009C |
Bacteria |
Houston-Galveston Region |
1009D |
Bacteria |
Houston-Galveston Region |
1009E |
Bacteria |
Houston-Galveston Region |
1010 |
Bacteria |
Houston-Galveston Region |
1010C |
Bacteria |
Houston-Galveston Region |
1011 |
Bacteria |
Houston-Galveston Region |
1013 |
Bacteria |
Houston-Galveston Region |
1013A |
Bacteria |
Houston-Galveston Region |
1013C |
Bacteria |
Houston-Galveston Region |
1014 |
Bacteria |
Houston-Galveston Region: Bacteria |
1014A |
Bacteria |
Houston-Galveston Region |
1014B |
Bacteria |
Houston-Galveston Region |
1014C |
Bacteria |
Houston-Galveston Region |
1014E |
Bacteria |
Houston-Galveston Region |
1014H |
Bacteria |
Houston-Galveston Region |
1014K |
Bacteria |
Houston-Galveston Region |
1014L |
Bacteria |
Houston-Galveston Region |
1014M |
Bacteria |
Houston-Galveston Region |
1014N |
Bacteria |
Houston-Galveston Region |
1014O |
Bacteria |
Houston-Galveston Region |
1015A |
Bacteria |
Houston-Galveston Region |
Segment Number |
Parameters |
Project Name |
1016 |
Bacteria |
Houston-Galveston Region: Bacteria |
1016A |
Bacteria |
Houston-Galveston Region |
1016B |
Bacteria |
Houston-Galveston Region |
1016C |
Bacteria |
Houston-Galveston Region |
1016D |
Bacteria |
Houston-Galveston Region |
1017 |
Bacteria |
Houston-Galveston Region: Bacteria |
1017A |
Bacteria |
Houston-Galveston Region |
1017B |
Bacteria |
Houston-Galveston Region |
1017C |
Bacteria |
Houston-Galveston Region |
1017D |
Bacteria |
Houston-Galveston Region |
1017E |
Bacteria |
Houston-Galveston Region |
1017F |
Bacteria |
Houston-Galveston Region |
1101 |
Bacteria Chlordane in fish tissue Dichloroethane in fish tissue & Trichloroethane in fish and crab issue |
Houston-Galveston Region: Bacteria & Clear Creek: Chlordane & Clear Creek: VOCs |
1101A |
Bacteria |
Houston-Galveston Region |
1101B |
Bacteria |
Houston-Galveston Region |
1101C |
Bacteria |
Houston-Galveston Region |
1101D |
Bacteria |
Houston-Galveston Region |
1101E |
Bacteria |
Houston-Galveston Region |
1102 |
Bacteria Chlordane in fish tissue Dichloroethane in fish tissue & Trichloroethane in fish and crab issue |
Houston-Galveston Region: Bacteria & Clear Creek: Chlordane & Clear Creek: VOCs |
1102A |
Bacteria |
Houston-Galveston Region |
1102B |
Bacteria |
Houston-Galveston Region |
1102C |
Bacteria |
Houston-Galveston Region |
1102D |
Bacteria |
Houston-Galveston Region |
1102E |
Bacteria |
Houston-Galveston Region |
1102F |
Bacteria |
Houston-Galveston Region |
1102G |
Bacteria |
Houston-Galveston Region |
1103 |
Bacteria |
Dickinson Bayou and Tidal Tributaries |
1103A |
Bacteria |
Dickinson Bayou and Tidal Tributaries |
1103B |
Bacteria |
Dickinson Bayou and Tidal Tributaries |
1103C |
Bacteria |
Dickinson Bayou and Tidal Tributaries |
1103D |
Bacteria |
Dickinson Bayou and Tidal Tributaries |
1103E |
Bacteria |
Dickinson Bayou and Tidal Tributaries |
1103F |
Bacteria |
Dickinson Bayou and Tidal Tributaries |
1103G |
Bacteria |
Dickinson Bayou and Tidal Tributaries |
1104 |
Bacteria |
Dickinson Bayou and Tidal Tributaries |
1113 |
Bacteria |
Houston-Galveston Region |
1113A |
Bacteria |
Houston-Galveston Region |
1113B |
Bacteria |
Houston-Galveston Region |
1113C |
Bacteria |
Houston-Galveston Region |
1113D |
Bacteria |
Houston-Galveston Region |
1113E |
Bacteria |
Houston-Galveston Region |
1209 |
Bacteria |
Navasota River Below Lake Limestone |
1209C |
Bacteria |
Carters Creek Watershed |
1209D |
Bacteria |
Carters Creek Watershed |
1209L |
Bacteria |
Carters Creek Watershed |
1226 |
Orthophosphorus |
North Bosque River |
1245 |
Bacteria, Dissolved Oxygen |
Upper Oyster Creek |
1254 |
Atrazine |
Aquilla Reservoir |
1255 |
Orthophosphorus |
North Bosque River |
1304 |
Bacteria |
Caney Creek |
1304A |
Bacteria |
Linville Bayou in the Caney Creek Watershed |
1403 |
Dissolved Oxygen |
Lake Austin |
1403J |
Bacteria |
Austin Area Watersheds |
1403K |
Bacteria |
Austin Area Watersheds |
1411 |
Sulfate, Total Dissolved Solids |
E.V. Spence Reservoir |
1426 |
Chloride, Total Dissolved Solids |
Colorado River Below E.V. Spence |
1428B |
Bacteria |
Austin Area Watersheds |
1428C |
Bacteria |
Gilleland Creek |
1429C |
Bacteria |
Austin Area Watersheds |
1501 |
Bacteria |
Tres Palacios Creek |
1602 |
Bacteria |
Lavaca River Above Tidal |
1602B |
Bacteria |
Rocky Creek |
1806 |
Bacteria |
Guadalupe River Above Canyon Lake |
1806A |
Bacteria |
Guadalupe River Above Canyon Lake |
1806D |
Bacteria |
Guadalupe River Above Canyon Lake |
1806E |
Bacteria |
Guadalupe River Above Canyon Lake |
1901 |
Bacteria |
Lower San Antonio River |
1910 |
Bacteria, Dissolved Oxygen |
Upper San Antonio River: Bacteria & Salado Creek: Dissolved Oxygen |
1910A |
Bacteria |
Upper San Antonio River |
1910 D |
Bacteria |
Upper San Antonio River |
1911 |
Bacteria |
Upper San Antonio River |
1911B |
Bacteria |
Upper San Antonio River |
1911C |
Bacteria |
Upper San Antonio River |
1911D |
Bacteria |
Upper San Antonio River |
1911E |
Bacteria |
Upper San Antonio River |
1911I |
Bacteria |
Upper San Antonio River |
2001 |
Bacteria |
Mission and Aransas Rivers |
2003 |
Bacteria |
Mission and Aransas Rivers |
2004 |
Bacteria |
Mission and Aransas Rivers |
2004B |
Bacteria |
Mission and Aransas Rivers |
2110 |
Nitrite + Nitrate Nitrogen |
Lower Sabinal River |
2202 |
Chlordane, DDD, DDE, DDT, Dieldrin, Endrin, Heptachlor, Heptachlor Epoxide, Hexachlorobenzene, and Lindane in fish tissue |
Arroyo Colorado |
2202A |
PCBs in fish tissue |
Arroyo Colorado |
2204 |
Chloride, Dissolved Solids, and Sulfate |
Petronila Creek |
2421 |
Bacteria in Oyster Waters |
Upper Texas Coast |
2422 |
Bacteria in Oyster Waters |
Upper Texas Coast |
2423 |
Bacteria in Oyster Waters |
Upper Texas Coast |
2424 |
Bacteria in Oyster Waters |
Upper Texas Coast |
2425B |
Bacteria |
Houston-Galveston Region |
2432 |
Bacteria in Oyster Waters |
Upper Texas Coast |
2433OW |
Bacteria in Oyster Waters |
Upper Texas Coast |
2434OW |
Bacteria in Oyster Waters |
Upper Texas Coast |
2435OW |
Bacteria in Oyster Waters |
Upper Texas Coast |
2439 |
Bacteria in Oyster Waters |
Upper Texas Coast |
2453C |
Bacteria |
Arenosa Creek |
2456 |
Bacteria |
Carancahua Bay |
2481CB |
Bacteria |
Corpus Christ Beaches, Cole Park and Ropes Park |
2482 |
Zinc in Oysters |
Nueces Bay |
2485 |
Bacteria |
Oso Bay |
2485A |
Bacteria |
Oso Creek |
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What Segments Are
Texas has more than 11,000 named water bodies. The TCEQ has divided most of the perennial (always flowing) streams and the lakes, wetlands, and estuaries that have large areas or are of major public interest, into segments. A segment is a water body, or portion of a water body.
Segments are used for several management activities, such as the designation of site-specific uses and criteria, assessment of instream water quality, issuance of permits to discharge into state waters, development of TMDLs, or allocation of grant funds.
Segments are aggregated by basin. Texas has
23 major river and coastal basins. See Hydrography Data and Map-Based Viewers for links to GIS-based data viewers and GIS water data layers.
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Contact the TMDL Program
Please email tmdl@tceq.texas.gov, or call us at 512-239-6682.
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