environmental setting, water quality, and ecological indicators of
environmental setting, water quality, and ecological indicators of
environmental setting, water quality, and ecological indicators of
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Appendix<br />
Appendix<br />
2.<br />
2.<br />
Pesticides<br />
Pesticides<br />
<strong>and</strong><br />
<strong>and</strong><br />
degradation<br />
degradation<br />
products<br />
products<br />
analyzed,<br />
analyzed,<br />
use,<br />
use,<br />
<strong>and</strong><br />
<strong>and</strong><br />
occurrence<br />
occurrence<br />
in<br />
in<br />
groundground<strong>and</strong><br />
<strong>and</strong><br />
surface-<strong>water</strong><br />
surface-<strong>water</strong><br />
samples<br />
samples<br />
from<br />
from<br />
the<br />
the<br />
Mermentau<br />
Mermentau<br />
River<br />
River<br />
Basin,<br />
Basin,<br />
southwestern<br />
southwestern<br />
Louisiana,<br />
Louisiana,<br />
1998-2001<br />
1998-2001—Continued<br />
[H, herbicide; DP, degredation product; I, insecticide; F, fungicide; Pesticides in bold italics were analyzed before analytical method approval, <strong>and</strong><br />
data in this report are provisional.]<br />
Pesticide or degradation product Use<br />
Number <strong>of</strong><br />
samples<br />
collected<br />
51<br />
Ground <strong>water</strong> Surface <strong>water</strong><br />
Samples with<br />
detected<br />
concentrations<br />
(percent)<br />
Number <strong>of</strong><br />
samples<br />
collected<br />
Samples with<br />
detected<br />
concentrations<br />
(percent)<br />
2,4-D H 29 3 36 77.8<br />
2,4-D methyl ester H 29 0 36 27.8<br />
2,4-DB H 29 0 36 .0<br />
2,6-Diethylaniline H, DP 29 0 242 .0<br />
2-Hydroxyatrazine H, DP 29 3 36 83.3<br />
3(4-Chlorophenyl)-1-methyl urea H, DP 29 3 36 .0<br />
3-Hydroxycarb<strong>of</strong>uran I, DP 29 0 36 .0<br />
3-Ketocarb<strong>of</strong>uran I, DP 29 0 36 .0<br />
Acetochlor H 29 0 242 .4<br />
Acifluorfen H 29 0 36 .0<br />
Alachlor H 29 3 242 10.7<br />
Aldicarb I 29 0 36 .0<br />
Aldicarb sulfone I, DP 29 0 36 .0<br />
Aldicarb sulfoxide I, DP 29 0 36 .0<br />
alpha-HCH I 29 0 242 .0<br />
Atrazine H 29 3 242 99.6<br />
Bendiocarb I 29 0 36 .0<br />
Benfluralin H 29 0 242 .0<br />
Benomyl F 29 0 36 36.1<br />
Bensulfuron-methyl H 29 0 36 47.2<br />
Bentazon H 29 10 36 75.0<br />
Bromacil H 29 0 36 22.2<br />
Bromoxynil H 29 0 36 .0<br />
Butylate H 29 0 242 .0<br />
Carbaryl I 29 0 241 26.1<br />
Carb<strong>of</strong>uran I 29 0 242 25.2<br />
Chloramben, methyl ester H 29 0 36 .0<br />
Chlorimuron-ethyl H 29 3 36 2.8<br />
Chlorothalonil H 29 0 36 .0<br />
Chlorpyrifos I 29 3 242 5.8<br />
Clopyralid H 29 0 36 .0<br />
Cyanazine H 29 0 242 .8<br />
Cycloate H 29 0 36 .0<br />
Dacthal (DCPA) H 29 0 242 .4<br />
Dacthal monoacid H, DP 29 0 36 .0<br />
Deethylatrazine H, DP 29 3 242 90.1<br />
Deethyldeisopropylatrazine H, DP 29 7 36 13.9<br />
Deisopropylatrazine H, DP 29 0 36 22.2<br />
Desulfinylfipronil I, DP 29 0 186 89.2<br />
Diazinon I 29 0 242 39.3<br />
Dicamba H 29 0 36 .0
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