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Sacramento River Basin NAWQA Program

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 near Knights Landing, California

Pesticides in filtered water (0.7 micrometer glass fiber filter) measured by
liquid chromatography/ultraviolet light spectrometry

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

Method reporting levels of all analytes

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

Date

Time

2,4,5-T (µg/L)

2,4-D (µg/L)

2,4-DB (µg/L)

Silvex (µg/L)

3-Hydroxycarbofuran (µg/L)

Acifluorfen (µg/L)

Aldicarb (µg/L)

Aldicarb Sulfone (µg/L)

Aldicarb Sulfoxide (µg/L)

Bentazon (µg/L)

Bromacil (µg/L)

Bromoxynil (µg/L)

Carbaryl (µg/L)

Carbofuran (µg/L)

Chloramben (µg/L)

Chlorothalonil (µg/L)

Clopyralid (µg/L)

Dacthal (µg/L)

Dicamba (µg/L)

Dichlobenil (µg/L)

Dichlorprop (µg/L)

Dinoseb (µg/L)

Diuron (µg/L)

DNOC (µg/L)

Fenuron (µg/L)

Fluometuron (µg/L)

Linuron (µg/L)

MCPA (µg/L)

MCP (µg/L)

Methiocarb (µg/L)

Methomyl (µg/L)

Neburon (µg/L)

Norfluorazon (µg/L)

Oryzalin (µg/L)

Oxamyl (µg/L)

Picloram (µg/L)

Propham (µg/L)

Propoxur (µg/L)

Triclopyr (µg/L)

11/7/96

1330

<.035

<.035

<.035

<.021

<.014

<.035

<.016

<.016

<.021

<.014

<.035

<.035

<.008

<.028

<.011

<.035

<.05

<.017

<.035

<.02

<.032

<.035

<.020

<.035

<.013

<.035

<.018

<.05

<.035

<.026

<.017

<.015

<.024

<.019

<.018

<.05

<.035

<.035

<.05

12/3/96

1000

<.035

<.035

<.035

<.021

<.014

<.035

<.016

<.016

<.021

0.07

<.035

<.035

<.008

<.028

<.011

<.035

<.05

<.017

<.035

<.02

<.032

<.035

<.009

<.035

<.013

<.035

<.018

<.05

<.035

<.026

<.017

<.015

<.024

<.019

<.018

<.05

<.035

<.035

<.05

1/14/97

1130

<.035

<.035

<.035

<.021

<.014

<.035

<.016

<.016

<.021

<.014

<.035

<.035

E.0010

<.028

<.011

<.035

<.05

<.017

<.035

<.02

<.032

<.035

0.35

<.035

<.013

<.035

<.018

<.05

<.035

<.026

<.017

<.015

<.024

<.18

<.018

<.05

<.035

<.035

<.05

2/18/97

1130

<.035

0.14

<.035

<.021

<.014

<.035

<.016

<.016

<.021

0.08

<.035

<.035

<.008

<.028

<.011

<.035

<.05

<.017

<.035

<.02

<.032

<.035

0.37

<.035

<.013

<.035

<.018

<.05

<.035

<.026

<.017

<.015

<.024

<.019

<.018

<.05

<.035

<.035

<.05

3/18/97

1030

<.035

0.78

<.035

<.021

<.014

<.035

<.016

<.016

<.021

0.1

<.035

<.035

<.008

<.028

<.011

<.035

<.05

<.017

<.035

<.02

<.032

<.035

0.69

<.035

<.013

<.035

<.018

0.94

<.035

<.026

<.017

<.015

<.024

E.03

<.018

<.05

<.035

<.035

<.05

4/9/97

1100

<.035

<.035

<.035

<.021

<.014

<.035

<.016

<.016

<.021

<.014

<.035

<.035

E.008

<.028

<.011

<.035

<.05

<.017

<.035

<.02

<.032

<.035

0.34

<.035

<.013

<.035

<.018

<.05

<.035

<.026

<.017

<.015

<.024

<.019

<.018

<.05

<.035

<.035

<.05

4/24/97

0940

<.035

<.035

<.035

<.021

<.014

<.035

<.016

<.016

<.021

0.08

<.035

<.035

<.008

0.2

<.011

<.035

<.05

<.017

<.035

<.02

<.032

<.035

0.13

<.035

<.013

<.035

<.018

<.05

<.035

<.026

<.017

<.015

<.024

<.019

<.018

<.05

<.035

<.035

<.05

5/9/97

0900

<.035

<.035

<.035

<.021

<.014

<.035

<.016

<.016

<.021

E.05

<.035

0.06

<.008

0.2

<.011

<.035

<.05

<.017

<.035

<.02

<.032

<.035

0.08

<.035

<.013

<.035

<.018

E.20

<.035

<.026

<.017

<.015

<.024

<.019

<.018

<.05

<.035

<.035

<.05

5/23/97

1030

<.035

<.035

<.035

<.021

<.014

<.035

<.016

<.016

<.021

0.08

<.035

<.035

<.008

0.15

<.011

<.035

<.05

<.017

<.035

<.02

<.032

<.035

0.07

<.035

<.013

<.035

<.018

<.05

<.035

<.026

<.017

<.015

<.024

<.019

<.018

<.05

<.035

<.035

<.05

6/17/97

1000

<.035

E.45

<.035

<.021

<.014

<.035

<.016

<.016

<.021

0.09

<.035

<.035

<.008

<.028

<.011

<.035

<.05

<.017

<.035

<.02

<.032

<.035

0.07

<.035

<.013

<.035

<.018

0.45

<.035

<.026

<.017

<.015

<.024

<.019

<.018

<.05

<.035

<.035

0.5

7/10/97

0940

<.035

<.035

<.035

<.021

<.014

<.035

<.016

<.016

<.021

0.09

<.035

<.035

<.008

<.028

<.011

<.035

<.05

<.017

<.035

<.02

<.032

<.035

0.04

<.035

<.013

<.035

<.018

0.24

<.035

<.026

<.017

<.015

<.024

<.019

<.018

<.05

<.035

<.035

1.1

7/28/97

1100

<.035

<.035

<.035

<.021

<.014

<.035

<.016

<.016

<.021

0.13

<.035

<.035

<.008

<.028

<.011

<.035

<.05

<.017

<.035

<.02

<.032

<.035

<.02

<.035

<.013

<.035

<.018

0.16

<.035

<.026

<.017

<.015

<.024

<.019

<.018

<.05

<.035

<.035

0.64

8/26/97

1100

<.035

<.035

<.035

<.021

<.014

<.035

<.016

<.016

<.021

<.014

<.035

<.035

<.008

<.028

<.011

<.035

<.05

<.017

<.035

<.02

<.032

<.035

<.02

<.035

<.013

<.035

<.018

<.05

<.035

<.026

<.017

<.015

<.024

<.019

<.018

<.05

<.035

<.035

<.05

9/18/97

1000

<.035

<.035

<.035

<.021

<.014

<.035

<.016

<.016

<.021

0.11

<.035

<.035

<.008

<.028

<.011

<.035

<.05

<.017

<.035

<.02

<.032

<.035

<.02

<.035

<.013

<.035

<.018

<.05

<.035

<.026

<.017

<.015

<.024

<.019

<.018

<.05

<.035

<.035

0.22

10/30/97

1040

<.035

<.035

<.035

<.021

<.014

<.035

<.016

<.016

<.021

<.014

<.035

<.035

0.04

<.028

<.011

<.035

<.05

<.017

<.035

<.02

<.032

<.035

<.02

<.035

<.013

<.035

<.018

<.05

<.035

<.026

<.017

<.015

<.024

<.019

<.018

<.05

<.035

<.035

<.05

11/12/97

1130

<.035

<.15

<.24

<.021

<.014

<.035

<.55

<.1

<.021

<.014

<.035

<.035

<.008

<.12

<.42

<.48

<.23

<.017

<.035

<1.2

<.032

<.035

<.02

<.42

<.013

<.035

<.018

<.17

<.14

<.026

<.017

<.015

<.024

<.31

<.018

<.05

<.035

<.035

<.25

12/17/97

1040

<.035

<.15

<.24

<.021

<.014

<.035

<.55

<.1

<.021

<.014

<.035

<.035

<.008

<.12

<.42

<.48

<.23

<.017

<.035

<1.2

<.032

<.035

0.21

<.42

<.013

<.035

<.018

<.17

<.14

<.026

<.017

<.015

<.024

<.31

<.018

<.05

<.035

<.035

<.25

1/21/98

1030

<.035

<.15

<.24

<.021

<.014

<.035

<.55

<.1

<.021

<.014

<.035

<.035

<.008

<.12

<.42

<.48

<.23

<.017

<.035

<1.2

<.032

<.035

0.31

<.42

<.013

<.035

<.018

<.17

<.14

<.026

<.017

<.015

<.024

<.31

<.018

<.05

<.035

<.035

<.25

2/26/98

1100

<.035

0.11

<.24

<.021

<.014

<.035

<.55

<.1

<.021

<.014

<.035

<.035

<.008

<.12

<.42

<.48

<.23

<.017

<.035

<1.2

<.032

<.035

0.2

<.42

<.013

<.035

<.018

0.18

<.14

<.026

<.017

<.015

0.06

<.31

<.018

<.05

<.035

<.035

<.25

3/11/98

1100

<.035

<.15

<.24

<.021

<.014

<.035

<.55

<.1

<.021

<.014

<.035

<.035

<.008

<.12

<.42

<.48

<.23

<.017

<.035

<1.2

<.032

<.035

0.16

<.42

<.013

<.035

<.018

0.08

<.14

<.026

<.017

<.015

E.02

<.31

<.018

<.05

<.035

<.035

<.25

4/15/98

1130

<.035

<.15

<.24

<.021

<.014

<.035

<.55

<.1

<.021

<.014

<.035

<.035

<.008

<.12

<.42

<.48

<.23

<.017

<.035

<1.2

<.032

<.035

0.25

<.42

<.013

<.035

E.03

<.17

<.14

<.026

<.017

<.015

<.024

<.31

<.018

<.05

<.035

<.035

<.25

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