Table 2. Concentrations of selected pesticides measured by polar organic chemical integrative samplers (POCIS) at three sites in the McKenzie River basin, Oregon, September–October 2007.
[A and B are replicate samples. MDL, method detection limit; MQL, method quantitation limit; “<,” compound not present at MDL; NQ, not quantified--compound detected at a concentration less than the MQL; detections are highlighted as bold type in shaded cells]
| Pesticide |
Concentrations, in nanograms of chemical per deployed POCIS |
| Water-treatment plant inlet |
|
Cedar Creek |
|
Camp Creek |
MDL |
MQL |
| A |
B |
A |
B |
A |
B |
| EPTC |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Desisopropylatrazine |
<20 |
<20 |
|
<20 |
<20 |
|
<20 |
<20 |
20 |
100 |
| Desethylatrazine |
<20 |
<20 |
|
<20 |
<20 |
|
<20 |
<20 |
20 |
100 |
| Trifluralin |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Atraton |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Simazine |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Prometon |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Dimethoate |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Atrazine |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Propazine |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Terbuthylazine |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Fonofos |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Cyromazine |
<20 |
<20 |
|
<20 |
<20 |
|
<20 |
<20 |
20 |
100 |
| Diazinon |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Metribuzin |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Acetochlor |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Methyl Parathion |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Simetryn |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Alachlor |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Ametryn |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Prometryn |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Carbaryl |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Terbutryn |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Malathion |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Metolachlor |
NQ |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Chlorpyrifos |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Dacthal |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Pendimethalin |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Fipronil |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Ethopabate |
<20 |
<20 |
|
<20 |
<20 |
|
<20 |
<20 |
20 |
100 |
| Endosulfan I |
<10 |
<10 |
|
<10 |
<10 |
|
<10 |
<10 |
10 |
50 |
| Tetrachlorvinphos |
<4 |
<4 |
|
<4 |
<4 |
|
<4 |
<4 |
4 |
20 |
| Endosulfan II |
<10 |
<10 |
|
<10 |
<10 |
|
<10 |
<10 |
10 |
50 |
| cis-Permethrin |
<1.5 |
<1.5 |
|
<1.5 |
<1.5 |
|
<1.5 |
<1.5 |
1.52 |
7.6 |
| trans-Permethrin |
<0.96 |
<0.96 |
|
<0.96 |
<0.96 |
|
<0.96 |
<0.96 |
0.96 |
4.8 |
|
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U.S. Department of the Interior | U.S. Geological Survey