Lower Leon Creek: Fish Tissue Sampling Project
Parameters: Polychlorinated biphenyls
Basin: San Antonio River
Project Background and Goals
Lower Leon Creek, Segment 1906, flows from a point 100 meters upstream of State Highway 16 northwest of San Antonio in Bexar County to its confluence with the Medina River. The watershed is primarily a highly urbanized residential area, and drains approximately 190 square miles. The watershed includes Lackland Air Force Base and the former site of Kelly Air Force Base.
In 2002, the Texas Department of State Health Services (now the Department of State Health Services) issued an advisory restricting the consumption of all species of fish from the creek because concentrations of PCBs in the tissues of fish posed an unacceptable risk to consumers.
The TCEQ contracted with the Department of State Health Services (DSHS) to collect and analyze additional fish at five stations along Lower Leon Creek. Their analysis resulted in a new fish consumption advisory (ADV-42), which expanded the geographic extent of the original advisory (ADV-26).
Local interest in the fish consumption impairment also spurred a survey and characterization of PCBs in sediments. This survey was a collaborative effort of USGS, SARA, and CoSA PCEH. Monitoring at the former Kelly Air Force Base has also yielded PCB data.
TCEQ staff worked with the Steering Committee of the San Antonio River Authority to keep the public informed of the status of fish tissue sampling activities. The Steering Committee is established under the Texas Clean Rivers Program.
For More Information
For additional information regarding this assessment, please e-mail us at firstname.lastname@example.org, and mention the Lower Leon Creek fish tissue sampling project in the subject line. Or call us at 512-239-6682.