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)

Colusa Basin Drain at Road 99E near Knights Landing, 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)

2/7/96

1030

<44

431

<31

<38

<41

4033

<41

<38

<57

<44

<25

186

<41

3/6/96

1030

<44

<60

<57

<22

<31

<38

<41

<28

<41

<28

<38

<57

<44

<25

<38

<60

<41

4/23/96

1030

<44

<60

<57

E13

<38

<41

E11

<38

<57

<25

100

<38

<60

<41

5/22/96

1000

E15

<44

3708

<57

E14

404

<38

<41

E15

<28

4970

<57

171

<25

<38

<60

<41

6/14/96

1000

E29

E23

3598

<57

<38

<41

E17

<41

<28

5971

<57

131

<25

<38

<60

<41

7/23/96

1001

<44

1384

<57

<22

E21

<38

<41

E11

<41

<28

273

<57

<25

<38

<60

<41

8/27/96

1002

<44

576

<57

<22

<38

<41

<28

<41

<28

<57

E13

<25

<38

<60

<41

9/9/96

1030

<44

420

<57

<22

<38

<41

<28

<41

<28

<57

<44

<25

<38

<60

<41

10/18/96

0950

<44

E23

<57

<22

<31

<38

<41

<28

<41

<28

<57

E11

<25

<38

<60

<41

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)

Colusa Basin Drain at Road 99E near Knights Landing, California

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)