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Last updated: October 11, 2002
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The National Water Quality Assessment (NAWQA) Program
Please visit our website at:
http://water.usgs.gov/nawqa.
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The National Water Quality Assessment
(NAWQA) Program
In 1991, the U.S. Geological Survey began
the NAWQA Program to describe the status of and trends in the quality of
a large representative part of the Nation's surface- and ground-water resources
and to identify the natural and human factors that affect the quality of
these resources. The NAWQA Program is designed to produce water-quality
information that is useful to policymakers and managers at Federal, State,
and local levels. The 60 proposed study units represent 60 to 70 percent
of the Nation's water use and population served by public water supplies.
The Southern Florida study was begun in 1994. |
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Pesticides and organic compounds detected
in composite samples (whole fish) of largemouth bass and Florida Gar at
15 sites in southern Florida, August through December, 1995
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Compound
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Minimum detection
limit (MDL), in µg/kg
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Number of detections
above MDL
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Maximum
concentration,
in µg/kg
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Location of maximum concentration
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| cis-Chlordane |
5.0
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4
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12.0
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Hillsboro Canal at S-6
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| oxy-Chlordane |
5.0
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1
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5.6
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Miami Canal at S-8
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| trans-Chlordane |
5.0
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3
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6.6
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Hillsboro Canal at S-6
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| o,p'-DDD |
5.0
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5
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34.0
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Hillsboro Canal at S-6
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| p,p'-DDD |
5.0
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6
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120.0
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Hillsboro Canal at S-6
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| p,p'-DDE |
5.0
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25
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1000.0
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Hillsboro Canal at S-6
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| o,p'-DDE |
5.0
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3
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6.9
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Hillsboro Canal at S-6
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| p,p'-DDT |
5.0
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4
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6.6
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Hillsboro Canal at S-6
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| Dieldrin |
5.0
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5
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18.0
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Hillsboro Canal at S-6
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| Mirex |
5.0
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1
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12.0
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Peace River at Arcadia
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| trans-Nonachlor |
5.0
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5
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19.0
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Hillsboro Canal at S-6
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| cis-Nonachlor |
5.0
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3
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7.0
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Hillsboro Canal at S-6
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| PCBs |
50.0
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3
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140.0
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Black Creek Canal
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Concentration of DDT and degradation
products in southern Florida fishes in 1995. Fish at sites 6 and
7 had multiple DDT degradation products; total DDT at all other sites was
principally p,p'DDE.
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Concentration of total DDT in largemouth
bass at locations where concentrations exceeded 100 µg/kg
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Click on this map to view
a larger version.
Bigger versions of the
numbered graphs are below. Click on these graphs for a larger version.
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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11
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12
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Concentration of total DDT in largemouth
bass at locations where concentrations were less than 100 µg/kg
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Click on this map to view
a larger version.
Bigger versions of the
numbered graphs are below. |
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13
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14
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15
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16
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17
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18
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19
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20
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21
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22
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23
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24
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25
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26
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27
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28
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| A complete description of these figures
and tables can be found in U. S. Geological Survey Fact Sheet FS-110-97,
ORGANOCHLORINE PESTICIDES AND PCBs IN SOUTHERN FLORIDA FISHES: THEN
AND NOW by Kim H. Haag and Benjamin F. McPherson
Hydrologic data and other information related
to the Southern Florida NAWQA project can be obtained from:
Project Chief
Southern Florida NAWQA Study
U. S. Geological Survey
4710 Eisenhower Blvd., Suite B-5
Tampa, FL 33634
Please visit the U. S. Geological Survey
on the World Wide Web at http://www.usgs.gov |
Note: This poster is also
available as a PDF file.
(You will need Adobe Acrobat in order to view the PDF.
Download Adobe Acrobat® for
free)
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