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Water-Quality Assessment of the Sacramento River
Basin, California: Water-Quality, Sediment and Tissue
Chemistry, and Biological Data, 1995-1998
(Open-File Report 2000-391)

Sacramento River at Colusa, California

Pesticides in filtered water (0.7 micrometer glass fiber filter) analyzed by gas
chromatography/ion trap mass spectrometry)

Number of significant figures do not reflect analytical method reporting levels.

Method reporting levels of all analytes

[nanogram/L - nanogram per liter, < - less than, E - estimate]

Date Time Eptam (nanogram/L) Pebulate (nanogram/L) Molinate (nanogram/L) Trifluralin (nanogram/L) Simazine (nanogram/L) Carbofuran (nanogram/L) Atrazine (nanogram/L) Fonofos (nanogram/L) Diazinon (nanogram/L) Carbaryl (nanogram/L) Alachlor (nanogram/L) Thiobencarb (nanogram/L) Malathion (nanogram/L) Metolachor (nanogram/L) Chlorpyrifos (nanogram/L) Dacthal (nanogram/L) Methidathion (nanogram/L) Napropamide (nanogram/L) Cyanazine (nanogram/L)
2/28/96 1210 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
3/20/96 1100 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
4/2/96 1220 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
5/16/96 1300 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
6/17/96 1100 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
7/16/96 1300 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
8/14/96 1030 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
9/25/96 1300 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
10/9/96 1130 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
11/14/96 1120 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
12/4/96 1030 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
1/4/97 1300 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 <28 <38 E17 <44 <25 <25 <38 <60 <41
2/12/97 1200 <44 <44 <60 <57 <22 <31 <38 <41 E1 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
3/13/97 1100 <44 <44 <60 <57 <22 <31 <38 <41 <28 E1 <28 <38 <57 <44 <25 <25 <38 <60 <41
4/16/97 1240 <44 <44 <60 <57 <22 <31 <38 <41 <28 E1 <28 <38 <57 <44 <25 <25 <38 <60 <41
5/20/97 1130 <44 <44 E40 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 E15 <25 <25 <38 <60 <41
6/3/97 1250 <44 <44 E20 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
7/31/97 1110 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
8/18/97 1120 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 E2 E1 <57 E6 E4 <25 <38 <60 <41
9/25/97 1130 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 E7 <38 <60 <41
10/21/97 1100 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 E3 <38 <57 <44 <25 <25 <38 <60 <41
11/13/97 1100 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
12/9/97 1100 <44 <44 <60 <57 E13 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
1/13/98 1150 <44 <44 <60 <57 <22 <31 <38 <41 E8 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
2/11/98 1300 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
3/17/98 1230 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41
4/8/98 1130 <44 <44 <60 <57 <22 <31 <38 <41 <28 <41 <28 <38 <57 <44 <25 <25 <38 <60 <41

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