Scientific Investigations Report 2008–5027
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2008–5027
Table 4. Pesticide concentrations in source and finished drinking water from the study water-treatment plant on the lower Clackamas River, Oregon, 2004–2005.
[Pesticide concentrations in micrograms per liter. See p. 3 for more information on the study plant’s water treatment process. Abbreviation: e, estimated value (see Glossary). Symbol: <, less than]
| Date | Pesticide or degradate |
Source water | Finished drinking water | Remark | Value | Remark | Value |
|---|---|---|---|---|---|---|
| 07-21-04 | Dacthal (DCPA) | 0.005 | 0.005 | |||
| 09-23-04 | Diuron | 0.02 | 0.02 | |||
| 08-25-04 | DEET | e | 0.007 | e | 0.008 | |
| 10-20-04 | Diuron | 0.06 | 0.04 | |||
| 02-09-05 | Diuron | 0.06 | 0.06 | |||
| Simazine | < | .005 | .006 | |||
| 03-09-05 | Simazine | < | 0.005 | e | 0.003 | |
| 04-06-05 | Hexazinone | e | 0.01 | e | 0.01 | |
| 05-18-05 | Diuron | 0.22 | 0.18 | |||
| Metsulfuron-methyl | < | .025 | e | .06 | ||
| Hexazinone | .022 | .02 | ||||
| Atrazine | .007 | e | .006 | |||
| Deethylatrazine (CIAT) | e | .005 | e | .005 | ||
| Pronamide | < | .004 | .005 | |||
| Trifluralin | e | .005 | e | .005 | ||
| Simazine | .005 | e | .004 | |||
| Dacthal (DCPA) | e | .002 | e | .002 | ||
| 09-30-05 | 2,4-D | 0.18 | 0.08 | |||
| Propiconazole (cis) | e | .003 | e | .001 | ||
| Propiconazole (trans) | e | .006 | e | .005 | ||
| Diazinon | .016 | < | .005 | |||
| Diazinon-oxon | < | .006 | e | .01 | ||
| Simazine | .018 | .02 | ||||
| Ethoprop | .009 | .006 | ||||
| Metolachlor | e | .005 | e | .002 | ||
U.S. Department of the Interior | U.S. Geological Survey
URL: http://pubs.usgs.gov/sir/2008/5027
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