In cooperation with the Texas Natural Resource Conservation Commission
Occurrence of Polychlorinated Biphenyls (PCBs) on Suspended Sediment in the Donna Canal, Hidalgo County, Texas, 1999–2001
U.S. Geological Survey
Fact Sheet 016-02
By B.J. Mahler, P.C. Van Metre, and R.M. Miranda
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The Donna Canal is a popular fishing spot
Water is pumped from the Rio Grande
PCBs in the Donna Canal
What are PCBs?
How does eating PCB-contaminated fish affect humans?
Sampling of Suspended Sediment
Sampling Results and Conclusion
Round 1: February 1999
Round 2: July 1999
Round 3: January 2000
Round 4: July 2000
Round 5: April 2001
What is the future of the Donna Canal?
|Location of the Donna Canal study area.|
|Aerial photographs of the Donna Canal (indicated by the dashed blue line), sampling sites, and concentrations detected. Flow is to the north from the pumphouse toward the reservoir. To the right are enlarged images of two areas of the canal chosen for more closely spaced sampling. Sampling sites are indicated with yellow dots, and results of samples collected during the same sampling trip are shown in the same color: white (February 1999), yellow (July 1999), pink (January 2000), blue (July 2000), and green (April 2001). All concentrations are in micrograms per kilogram of sediment collected.|
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