Analysis of Pesticides in Surface Water and Sediment from Yolo Bypass, California, 2004–2005
By Kelly L. Smalling, James L. Orlando, and Kathryn M. Kuivila
Scientific Investigations Report 2005-5220, published 2005.
Table 6
Pesticide concentrations detected in surface water samples from a Yolo Bypass, California, transect on March 3, 2004.
[See fig. 2 for site locations. Pesticide concentrations in nanogram per liter. Samples were analyzed for the following pesticides that were not detected: Alachlor, Atrazine, Butylate, Carbaryl, Carbofuran, Chlorpyrifos, Cycloate, DCPA, EPTC, Ethalfluralin, Malathion, Methidathion, Methyl parathion, Napropamide, Oxyfluorfen, Pebulate, Pendimethalin, Phosmet, Piperonyl butoxide, and Prometryn; nd, not detected]
Site no. Diazinon Hexazinone Metolachlor Molinate Simazine Thiobencarb Trifluralin
1 nd 34.8 nd nd 59.6 nd 4.1
2 nd 42.9 14.5 nd 58.7 nd 5.5
3 43.4 377 32.2 22 341 24.2 6.9
4 53.8 413 35.8 24.4 411 26.9 6.9
5 36.5 277 27.6 16.7 251 24.1 5.1
6 33.6 309 25.8 17.6 279 20.6 4.6
7 nd 26.7 8.1 nd 17.5 nd 3.6
8 nd 26.5 8.2 nd 20.9 nd nd
9 nd 26.3 9 nd 21 nd nd
10 nd 31.7 14.9 nd 30.9 nd 3.8