| Abstract: | Water samples were collected from the Alamo River and the Salton Sea, California, in autumn 1996 and late winter/early spring 1997 and analyzed for dissolved pesticides. The two seasons chosen for sampling were during pesticide application periods in the Imperial Valley. Pesticide concentrations were measured in filtered water samples using solid-phase extraction and analyzed by gas chromatography/mass spectrometry. Generally, the highest concentrations were measured in the Alamo River. The concentrations of carbaryl, chlorpyrifos, cycloate, dacthal, diazinon, and eptam were highest in samples collected in autumn 1996. In contrast, the concentrations of atrazine, carbofuran, and malathion were highest in samples collected in late winter/early spring 1997. The highest concentrations measured of atrazine, carbofuran, dacthal, eptam, and malathion all exceeded 1,000 nanograms per liter. |
| Genre: | USGS Numbered Series |
| ProdID: | 51177 |
| Citation Author: | Crepeau, Kathryn L.; Kuivila, Kathryn M.; Bergamaschi, Brian |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | 7 p. |
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| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 2002-232 |
| Citation Search Results Text: | Dissolved pesticides in the Alamo River and the Salton Sea, California, 1996-97; 2002; OFR; 2002-232; Crepeau, Kathryn L.; Kuivila, Kathryn M.; Bergamaschi, Brian |
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| Citation Year: | 2002 |
| Type: | citation/reference |
| Text: | Dissolved pesticides in the Alamo River and the Salton Sea, California, 1996-97; 2002; OFR; 2002-232; Crepeau, Kathryn L.; Kuivila, Kathryn M.; Bergamaschi, Brian |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| URL (INDEX PAGE): | http://pubs.usgs.gov/of/ofr02232/ |
| Date Other: | Tue, 1 Oct 2002 00:00 -0500 |
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