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Upper San Antonio River: Implementing a Watershed Protection Plan in San Antonio

A project that retrofits low impact development features as part of implementing the Upper San Antonio River Watershed Protection Plan.

Background

Prior to the start of this project, portions of the Upper San Antonio River (segment 1911) had not met state water quality standards for bacteria since 2000. In 2006, the San Antonio River Authority (SARA) completed the Upper San Antonio River Watershed Protection Plan (WPP), and in 2007 the TCEQ adopted a total maximum daily load (TMDL) addressing this segment. The WPP was updated in 2014 and the update was accepted by EPA in 2015. This update calls for a 30% reduction in bacteria loading from stormwater across the watershed.

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Project Description

This project demonstrates the feasibility of LID retrofit projects in a heavily urbanized area to reduce bacteria loading. The LID features are rainwater harvesting with cisterns, permeable pavement, and bioretention. Runoff sampling at SARA’s Guenther and Euclid properties show high bacteria concentrations and other constituents of concern, including nutrients. The selected sites present challenges that offer important demonstration opportunities, including limited unpaved land and limited right-of-way at each site.

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Documents

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For More Information

To find out more about the NPS Program, call 512-239-6682 or e-mail us at nps@tceq.texas.gov.

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