San Antonio River Basin, Leon River, and Peach Creek: A TMDL Project for Bacteria
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Leon River
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Counties: Bastrop, Bexar, Caldwell, Comanche, Coryell, DeWitt, Erath, Fayette, Goliad, Gonzales, Guadalupe, Hamilton, Karnes, Mills, Refugio, Victoria, Wilson
Parameter: Bacteria
River Basins: San Antonio, Guadalupe, Brazos
Segments: 1221, 1803C, 1901, 1910, 1910A, 1911
Background and Goals
In seven streams in the San Antonio, Brazos, and Guadalupe River Basins, water quality testing found concentrations of bacteria that may pose a health risk for swimmers. Swimming and other forms of recreation in which people come into direct contact with the water are called “contact recreation” in the state’s standards for water quality.
The goal of this project was to evaluate the need for TMDLs to reduce bacteria concentrations to within acceptable risk levels in the affected segments—the Medina River below the Medina Diversion Lake (Segment 1903), the Leon River below Proctor Lake (Segment 1221), Peach Creek (Segment 1803C), San Antonio River (Segment 1901), Salado Creek (Segment 1910), Walzem Creek (Segment 1910A), and Upper San Antonio River (Segment 1911).
Phase I: Evaluation
Additional data collected from the Medina River below the Medina Diversion Lake (Segment 1903) indicated that the segment is meeting the applicable criteria; consequently, no TMDL will be developed for the segment unless conditions change. Four projects have been formed to develop TMDLs for the other six segments (see below).
Phase II: TMDL Development
Because of the geographic separation among the watersheds, the TCEQ formed four subprojects to develop the necessary TMDLs. Get information on development of the TMDLs by following the links below.
- Leon River below Proctor Lake (Segment 1221)
- Peach Creek (Segment 1803C)
- Lower San Antonio River (Segment 1901)
- Upper San Antonio River (Segments 1910, 1910A, and 1911)
For More Information
Please e-mail us at tmdl@tceq.texas.gov, and reference the San Antonio–Leon–Peach assessment project in the subject line. Or call Natalie Bell at 512-239-6941.
