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Llano Grande Lake Bottom Sediments--A Chronicle of Water-Quality Changes in the Arroyo Colorado, South Texas, 1989-2001

By B.J. Mahler, and P.C. Van Metre

Fact Sheet 065-02

In cooperation with the U.S. Environmental Protection Agency

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Link to pdf version


Highlights of Findings

Collection and Age-Dating of the Sediment Core

Trends in Organochlorine Compounds

Trends in Major and Trace Elements

Conclusions and Implications




  1. Location of the study site
  2. Concentrations of Cesium-137, total DDT, and normalized lead from a sediment core collected from Llano Grande Lake


  1. Concentrations of selected organochlorine compounds and major and trace elements in the Llano Grande Lake sediment core

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