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You are here: Home / Water Quality / Total Maximum Daily Load Program / San Antonio River Basin, Leon River, and Peach Creek: A TMDL Project for Bacteria

San Antonio River Basin, Leon River, and Peach Creek: A TMDL Project for Bacteria

A completed project to assess the need to develop bacteria TMDLs for the San Antonio River, Salado Creek, Walzem Creek, Leon River, and Peach Creek
photo of the Leon River
Leon River

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).

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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.

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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.

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