Pesticides in Streams of the United States--Initial Results from the National Water-Quality Assessment Program

By Steven J. Larson, Robert J. Gilliom, and Paul D. Capel

U.S. GEOLOGICAL SURVEY
Water-Resources Investigations Report 98-4222
Sacramento, California, 1999

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Figure 11. Distribution of total pesticide concentrations in all samples collected from the 58 sites each month during 1993-95. The total number of samples that were collected during each month is shown in parenthesis. (See figure 5A and associated text for an explanation of boxplots.)

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