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Austin Area Watersheds

This is a community project to reduce bacteria and protect recreational safety in Waller, Walnut, and Shoal Creeks and Taylor Slough in the City of Austin. The Austin community updated their Implementation Plan (I-Plan), which together with TMDLs developed by the TCEQ, provide the road map for improving water quality. The commission adopted the TMDLs and approved the original I-Plan. The updated I-Plan was finalized in August 2022 and will extend activities to reduce bacteria through 2027.

County: Travis
Parameter: Bacteria
River Basin: Colorado
Segments: 1403J, 1403K, 1428B, 1429C

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Background and Goal

High concentrations of bacteria are often found in four streams in the Austin metropolitan area —Waller and Walnut Creeks, Spicewood Tributary to Shoal Creek, and Taylor Slough South. High concentrations of bacteria may indicate a health risk to people who swim or wade in the creeks—activities called “contact recreation” in the state’s standards for water quality.

The goal of the project is to reduce bacteria levels to protect people who swim or wade in the creeks. The City of Austin provides information about the watersheds on its ATX: Find Your Watershed map-based viewer. Click on the watershed of interest to you to see its most recent environmental summaries and scores. 

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Watershed Description

Waller Creek (1429C), with a drainage area of six square miles upstream of the Waller Creek Tunnel, is strongly influenced by runoff from the immediate downtown area and the University of Texas (UT) campus. Austin Water Utility maintains a wastewater collection system in the Waller Creek watershed. Although it does not discharge to Waller Creek, wastewater collector pipes run the length of the creek, crossing it many times.

Walnut Creek (1428B) flows from northern Austin to the Colorado River. It flows naturally most of the time and drains about 43 square miles. Development in the upper section of the watershed has been faster and denser than in the lower section.

Spicewood Tributary (1403J) is a small stream that in northwest Austin that flows into Shoal Creek. It is heavily influenced by stormwater runoff from Spicewood Springs Road and other adjacent neighborhood streets, and possibly by the single-family residences along the creek. Wastewater pipes in the collection system run the length of the tributary. Spicewood Spring, the source of the tributary, is at a higher elevation and is not affected by water quality in the stream.

Taylor Slough South (1403K) is about a mile long, with a watershed of about half a mile. It flows through the central-west part of the city and into Lake Austin. Multiple wastewater pipes parallel and cross the creek immediately upstream of Reed Park, which maintains a swimming pool and restrooms. Some sections of the creek, which lies entirely within the Edwards Aquifer recharge zone, become dry for part of the year.

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Get Involved

Throughout this project, all interested stakeholders and communities that use or affect the four Austin streams in the TMDL have been engaged in developing the strategy to improve water quality. The UT School of Law Center for Public Policy Dispute Resolution coordinated public involvement development of the original I-Plan, and also coordinated the update to the Austin Watersheds I-Plan, which extends implementation activities for an additional five years, through 2027. TCEQ coordinates annual meetings about implementation status.

For more information about the I-Plan Update, visit the Austin Streams I-Plan Update webpage.

Learn about what it means to participate in TMDL projects.

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Status and Activities

NEW The City of Austin has added a new feature, the City of Creeks Learning Series YouTube logo, to their YouTube channel. The video series aims to help residents understand how streams function, how they can affect water quality, and how the City manages the quality of its streams. Topics include Proactive Solutions to Project Our Watersheds, Stormwater Control Measures, Challenges of an Ever-Growing City, and Ecological Thresholds.


Stakeholders met between June 2021 and August 2022 to develop an update to their original I-Plan. They submitted their final draft of the Updated I-Plan to TCEQ on August 24, 2022. See information about the stakeholder group, including meeting announcements and records, on the Austin Area Watersheds I-Plan Update webpage. 

Status updates will resume in 2023. See stakeholder reports of progress on their original January 2015 I-Plan below.

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Approved I-Plan and Adopted TMDLs

Updated Austin Streams I-Plan

Stakeholders in the Austin Streams I-Plan updated the current I-Plan to extend their efforts for an additional five years, 2023 through 2027. See information about the stakeholder group, including meeting announcements and records, on the Austin Area Watersheds I-Plan Update webpage. 

Approved I-Plan

On January 21, 2015, the Commission approved this I-Plan. Community stakeholders created the plan.

Adopted TMDLs

On January 21, 2015, the Commission adopted these TMDLs. Community stakeholders advised TCEQ on their development. EPA approved the TMDLs on March 18, 2015, at which time they became part of the state’s Water Quality Management Plan.

April 2015 Update to the TMDLs

At request of the Austin Streams stakeholder group, TCEQ added four TMDLs for Austin Streams via the April 2015 Water Quality Management Plan Update. The TMDLs, which were discussed in the original TMDL report adopted by the Commission, are for assessment units that are of concern, but which are not identified as impaired on the 303(d) List. 

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Contact the TMDL Program Team

Please email and mention the Austin Area Watersheds project. Or call us at 512-239-6682.

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Communities Working Together