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Brazos–Colorado Coastal Basin Watersheds: Protecting Recreational Uses

The goal of this current project is to make recreation safer by reducing bacteria levels in waterways of the Brazos–Colorado Coastal Basin.
map of Brazos-Colorado Coastal Basin watersheds

Brazos–Colorado Coastal Basin Watersheds
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High bacteria concentrations can indicate a health risk to people who swim or wade in natural waters—called “contact recreation” in the state’s standards for water quality, the term refers to all recreation in which people are likely to swallow natural waters.

The Houston-Galveston Area Council is working on behalf of the TCEQ with local stakeholders to develop a watershed-based strategy that will reduce bacterial pollution and improve water quality in waterways of the Brazos–Colorado Coastal Basin.

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Get Involved

The Houston–Galveston Area Council (H–GAC) is coordinating public participation in improving the Brazos–Colorado Coastal Basin watersheds.

Watch for meeting announcements here and on the H–GAC website Exit the TCEQ.

UPDATE Next Meeting

February 21, 2019
5:00 - 7:00 p.m.

Bay City Civic Center
207 7th Street,
Bay City

Purpose of the meeting: At this meeting, stakeholders will discuss the work completed to date on Caney Creek and Linville Bayou and next steps, including formation of a coordination committee to oversee the watershed planning process.

About the Watershed

Location: Southwest of Houston

Counties: Parts of Austin, Brazoria, Colorado, Fort Bend, Matagorda, and Wharton

Basin: Brazos–Colorado Coastal (Basin 13)

This basin encompasses about 1,865 square miles. Native vegetation consists of tallgrass prairies, live oak woodlands, and a variety of salt tolerant plants with extensive wetland and seagrass habitats providing food and shelter for numerous bird species and aquatic organisms.

About half the basin is used for agricultural purposes, almost evenly split between cultivated crops and pastures for grazing or hay production. Topography ranges from rolling hills nearing 400 feet near the town of New Ulm in Austin County at the edge of the Post Oak Savannah region to sea-level at the Gulf of Mexico. The basin has a population of about 88,000 people. There are no large cities within the basin.

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Waterways of Focus

Activities will focus on waterways where bacteria concentrations exceed standards, with an eye toward broader solutions for the entire watershed.

  • San Bernard River Tidal (Segment 1301)
  • San Bernard River Above Tidal (Segment 1302)
  • Gum Tree Branch (Segment 1302A)
  • West Bernard Creek (Segment 1302B)
  • Caney Creek Tidal (Segment 1304)
  • Linnville Bayou (Segment 1304A)
  • Caney Creek Above Tidal (Segment 1305)

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Contact Us

Please e-mail us at tmdl@tceq.texas.gov, and mention the Brazos–Colorado Coastal Basin project in the subject line. Or call us at 512-239-6682.

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communities working together taking care of our rivers, lakes, and bays