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Houston-Galveston Region: Implementation Plan and TMDLs

The goal of this plan, developed by the Bacteria Implementation Group (BIG), is to make recreation safer by reducing bacteria levels in waterways of the Houston area. The TMDLs and Implementation Plan together are the road map to improving water quality.

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Project Location and Parameters Houston–Galveston BIG Project Navigation TMDL Program Navigation
Parameter: Bacteria
River Basin: San Jacinto, San Jacinto–Brazos Coastal

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Implementation Plan

The commission approved the implementation plan on January 30, 2013. This plan was developed by stakeholders in the Bacteria Implementation Group (BIG) Exit the TCEQ.

This plan originally implemented 72 TMDLs for 60 waterway segments in 10 counties. Other TMDLs and water bodies have since been added. The TMDLs for Armand Bayou were added to the BIG I-Plan by vote of the BIG and the Armand Bayou stakeholders in 2014; the commission approved this action in 2015. The TMDLs for San Jacinto River were added by vote of the BIG and the San Jacinto stakeholders in 2015; the commission approved this action in 2016. The TMDL for Jarbo Bayou was added to the BIG I-Plan by vote of the BIG and the Jarbo Bayou stakeholders in 2015; the commission approved this action in 2018.

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TMDLs

On the date of their approval by EPA, all these TMDLs became part of the state’s Water Quality Management Plan.

  • Armand Bayou
    The commission adopted these TMDLs on August 5, 2015. The EPA approved them on October 2, 2015.
  • Brays Bayou watersheds
    The commission adopted these TMDLs on September 15, 2010. The EPA approved them on September 27, 2010. EPA approved an addendum to the TMDLs in August 2013.
  • Buffalo and Whiteoak Bayous
    The commission adopted these TMDLs on April 8, 2009. The EPA approved them on June 11, 2009. The EPA approved Addendum I to these TMDLs in August 2013. The EPA approved Addendum II to these TMDLs in July 2015.
  • Clear Creek
    The commission adopted these TMDLs on September 10, 2008. The EPA approved them on March 6, 2009. The EPA approved an addendum to the TMDLs in March 2013.
  • Eastern Houston watersheds
    The commission adopted these TMDLs on September 15, 2010. The EPA approved them on September 27, 2010. The EPA approved an addendum to the TMDLs in August 2013.
  • Greens Bayou
    The commission adopted these TMDLs on June 2, 2010. The EPA approved them on August 12, 2010.
  • Halls Bayou
    The commission adopted these TMDLs on September 15, 2010. The EPA approved them on September 27, 2010
  • Jarbo Bayou
    The commission adopted this TMDL on January 24, 2018. The EPA approved the TMDL on March 29, 2018.
  • Lake Houston Upstream Watersheds
    The commission adopted these TMDLs on April 6, 2011. The EPA approved them on June 29, 2011. The EPA approved an addendum to the TMDLs in February 2014.
  • San Jacinto River, East and West Forks; Lake Houston; and Crystal Creek
    The commission adopted these TMDLs on August 24, 2016. The EPA approved them on October 7, 2016.
  • Sims Bayou
    The commission adopted these TMDLs on September 15, 2010. The EPA approved them on September 27, 2010. The EPA approved an addendum to the TMDLs in August 2013.

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Revisions to TMDLs

From time to time, it is necessary to revise TMDLs to account for changing conditions in the watershed. Revisions to the load allocations in TMDLs are made via the state’s Water Quality Management Plan (WQMP), which is updated quarterly.

The WQMP provides projected effluent limits for use in planning and permitting activities under the Texas Pollutant Discharge Elimination System (TPDES). The TCEQ reviews all applications for new and amended permits for conformance with applicable portions of the WQMP, including adopted TMDLs.

Revisions are made to TMDLs in one of two ways:

  • Updates are made to account for changing conditions in the watershed, such as new or revised wasteload allocations, permits that have been canceled or have expired, or changed facility names.
  • Addenda are created to add load allocations for assessment units that are impaired by the same pollutant or condition, within the same watershed as in the original TMDL report.

Revisions to the TMDLs are documented next to the original TMDL report. Both updates and addenda are provided in the same units of measure used in the original TMDL.

Summary of TMDLs, Addenda, and Updates

All linked files in the table below are provided in PDF Adobe Acrobat PDF Document

TMDLs Addenda Updates

Armand Bayou

Six Total Maximum Daily Loads for Indicator Bacteria in Armand Bayou
Segments: 1113, 1113A, 1113B, 1113C, 1113D, and 1113E
Assessment Units: 1113_02, 1113A_01, 1113B_01, 1113C_01, 1113D_01, and 1113E_01

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Brays Bayou

Five Total Maximum Daily Loads for Indicator Bacteria in Brays Bayou Above Tidal and Tributaries
Segments: 1007B, 1007C, 1007E, and 1007L
Assessment Units: 1007B_01, 1007B_02, 1007C_01, 1007E_01, and 1007L_01

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TMDL Addendum: Three TMDLs for Brays Bayou Watershed
Segments: 1007S, 1007T, and 1007U
Assessment Units: 1007S_01, 1007T_01, and 1007U _01

Submitted in the April 2013 Update to the WQMP. EPA approved August 2013.

Buffalo and Whiteoak Bayous

Eighteen Total Maximum Daily Loads for Bacteria in Buffalo and Whiteoak Bayous and Tributaries
Segments: 1013, 1013A, 1013C, 1014, 1014A, 1014B, 1014E, 1014H, 1014K, 1014L, 1014M, 1014N, 1014O, 1017, 1017A, 1017B, 1017D, and 1017E
Assessment Units: 1013_01, 1013A_01, 1013C_01, 1014_01, 1014A_01, 1014B_01, 1014E_01, 1014H_01, 1014H_02, 1014K_01, 1014K_02, 1014L_01, 1014M_01, 1014N_01, 1014O_01, 1017_01, 1017_02, 1017_03, 1017_04, 1017A_01, 1017B_02, 1017D_01, 1017E_01

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TMDL Addendum I: One TMDL for Bacteria in Vogel Creek
Segment: 1017C
Assessment Unit: 1017C_01

Submitted to EPA in the April 2013 Update to the WQMP. EPA approved August 2013.

TMDL Addendum II: One TMDL for Bacteria in Rolling Fork Creek
Segment: 1017F
Assessment Unit: 1017F_01

Submitted to EPA in the April 2015 Update to the WQMP. EPA approved July 2015.

Clear Creek

Nine Total Maximum Daily Loads for Bacteria in Clear Creek and Tributaries
Segments: 1101, 1101B, 1101D, 1102, 1102A, 1102B, 1102C, 1102D, and 1102E
Assessment Units: 1101_01, 1101_02, 1101_03, 1101B_01, 1101B_02 1101D_01, 1101D_02, 1102_01, 1102_02, 1102_03, 1102_04 , 1102_05, 1102A_01, 1102A_02, 1102B_01, 1102C_01, 1102D_01, 1102E_01

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TMDL Addendum: Four TMDLs in Clear Creek Watershed
Segments: 1101A, 1101C, 1101E, and 1102G
Assessment Units: 1101A_01, 1101C_01, 1101E_01,and 1102G_01

Submitted in the October 2012 Update to the WQMP. EPA approved March 2013.

Eastern Houston Watersheds

Thirteen Total Maximum Daily Loads for Indicator Bacteria in Eastern Houston Watersheds
Segments: 1006F, 1006H, 1007F, 1007G, 1007H, 1007I, 1007K, 1007M, 1007O, and 1007R
Assessment Units: 1006F_01, 1006H_01, 1007F_01, 1007G_01, 1007H_01, 1007I_01, 1007K_01, 1007M_01, 1007O_01, 1007R_01, 1007R_02, 1007R_03, and 1007R_04

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TMDL Addendum: One TMDL for Eastern Houston Watersheds
Segment: 1007V
Assessment Unit: 1007V_01

Submitted in the April 2013 Update to the WQMP. EPA approved August 2013.

Greens Bayou

Eight Total Maximum Daily Loads for Indicator Bacteria in Greens Bayou Above Tidal and Tributaries
Segments: 1016, 1016A, 1016B, 1016C, and 1016D
Assessment Units: 1016_01, 1016_02, 1016_03, 1016A_02, 1016A_03, 1016B_01, 1016C_01, and 1016D_01

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Halls Bayou and Tributaries

Four Total Maximum Daily Loads for Indicator Bacteria in Halls Bayou and Tributaries
Segments: 1006D, 1006I, and 1006J
Assessment Units: 1006D_01, 1006D_02, 1006I_01, and 1006J_01

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Jarbo Bayou

One Total Maximum Daily Load for Indicator Bacteria in Jarbo Bayou
Segment: 2425B
Assessment Unit: 2425B_01

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Lake Houston Upstream Watersheds

Fifteen Total Maximum Daily Loads for Indicator Bacteria in Watersheds Upstream of Lake Houston
Segments: 1004E, 1008, 1008H, 1009, 1009C, 1009D, 1009E, 1010, and 1011
Assessment Units: 1004E_02, 1008_02, 1008_03, 1008_04, 1008H_01, 1009_01, 1009_02, 1009_03, 1009_04, 1009C_01, 1009D_01, 1009E_01, 1010_02, 1010_04, and 1011_02

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TMDL Addendum: Six TMDLs for Lake Houston Area Watersheds
Segments: 1008B, 1008C, 1008E, and 1011
Assessment Units: 1008B_01, 1008B_02, 1008C _01, 1008C_02, 1008E_01, and 1011_01

Submitted in the October 2013 Update to the WQMP. EPA approved February 2014.

San Jacinto River, East and West Forks; Lake Houston; and Crystal Creek

Seven Total Maximum Daily Loads for Indicator Bacteria in the East and West Forks of the San Jacinto River, Lake Houston, and Crystal Creek Watersheds
Segments: 1002, 1003, 1004, and 1004D
Assessment Units: 1002_06, 1003_01, 1003_02, 1003_03, 1004_01, 1004_02, and 1004D_01

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Sims Bayous and Tributary

Four Total Maximum Daily Loads for Indicator Bacteria in Sims Bayou Above Tidal and Tributary
Segments: 1007D and 1007N
Assessment Units: 1007D_01, 1007D_02, 1007D_03, and 1007N_01

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TMDL Addendum: One TMDL for Sims Bayou Watershed
Segment: 1007A
Assessment Unit: 1007A_01

Submitted in the April 2013 Update to the WQMP. EPA approved August 2013.

Contact Us

For more information regarding this project, please e-mail us at tmdl@tceq.texas.gov, and mention the Houston-Galveston bacteria project in the subject line. Or call us at 512-239-6682.

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