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You are here: Home / Water Quality / Total Maximum Daily Load Program / Arroyo Colorado: A TMDL Project for Legacy Pollutants and Organics

Arroyo Colorado: A TMDL Project for Legacy Pollutants and Organics

A completed project to reduce legacy pollution from chemicals and make it safe to eat fish from the waterways.

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photo of the Arroyo Colorado
Arroyo Colorado

 
Counties:
Cameron and Hidalgo
Parameters: Legacy pollutants and organics in fish tissue
River Basin: Nueces-Rio Grande Coastal
Segments: 2202, 2202A
 

Background and Goals

The Arroyo Colorado, an ancient distributary channel of the Rio Grande, extends 90 miles from Mission, Texas to the Laguna Madre in the Rio Grande Valley. Water quality and fish tissue analyses show that legacy pollutants occur in fish tissues in such concentrations to warrant a fish consumption advisory upstream of the Port of Harlingen. Legacy pollutants are chemicals whose use has been banned or severely restricted, but which still remain in the environment.

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TMDLs and Implementation Plan

photo of the Arroyo Colorado
Collecting Water Quality and Flow Data

The commission adopted these TMDLs on July 25, 2003. The EPA approved the TMDLs on May 13, 2004, at which time they became part of the state’s Water Quality Management Plan.

The commission adopted these TMDLs on January 17, 2001. The EPA approved the TMDLs on June 14, 2001, at which time they became part of the state’s Water Quality Management Plan.

The Commission approved this Implementation plan on September 14, 2001.

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For More Information

Send us an e-mail at tmdl@tceq.texas.gov and reference the Arroyo Colorado in the subject line, or call us at 512-239-6278.

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