Factors Affecting the Occurrence and Distribution of Pesticides in the Yakima River Basin, Washington, 2000

Scientific Investigations Report 2007–5180

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5180

Figure - refer to figure caption for alternative text description

Figure 10. Relation between pesticide organic carbon-water partitioning coefficient (K_oc) value and pesticide loss, Yakima River Basin, Washington, 2000. Hypothetical pesticide losses were calculated for sites where a pesticide was reported to have been used, but where concentrations were below the detection level. A concentration of 0.0001 microgram per liter was used to calculate the hypothetical losses. Line shows the ordinary least-squares regression fit through losses of detected pesticides.

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