Dallas and Tarrant Counties: A TMDL Project for Legacy Pollutants

Lake Worth Photograph courtesy of the Fort Worth Water Department

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Counties: Dallas, Tarrant
Parameter: chlordane, DDT, DDD, DDE, dieldrin, heptachlor epoxide, and polychlorinated biphenyls (PCBs) in fish tissue
Basin: Trinity River
Segments: 0805, 0841, 0841A
  

• Project Overview (PDF)
• Background and Goals
• Adopted TMDLs
• Implementation Plan
• For More Information
   

Background and Goals

Seven legacy pollutants were detected in fish tissues in portions of the Upper Trinity River, the Lower West Fork Trinity River, and Mountain Creek Lake, all in the Dallas area. Legacy pollutants are chemicals whose use has been banned or severely restricted, but which still remain in the environment. The pollutants involved include chlordane, DDT, DDD, DDE, dieldrin, heptachlor epoxide, and PCBs, most of which were once used as insecticides. The goal of this TMDL project is the reduction of concentrations of fish-tissue contaminants to levels that constitute an acceptable risk to consumers.

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Adopted TMDLs

The TCEQ adopted these TMDLs on December 20, 2000.

• Nine Total Maximum Daily Loads for Legacy Pollutants in Streams and a Reservoir in Dallas and Tarrant Counties
• No written or oral comments were received from the public regarding these TMDLs.

The EPA approved these TMDLs on June 27, 2001, at which time they became part of the state's Water Quality Management Plan.

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Implementation Plan

• Implementation Plan for Dallas and Tarrant County Legacy Pollutant TMDLs
• Response to Public Comment on the Dallas and Tarrant County Implementation Plan

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For More Information

Please e-mail us at tmdl@tceq.texas.gov and reference the Dallas and Tarrant Counties TMDL project in the subject line. Or call us at 512-239-6682.

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