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 10. Distribution of the number of different compounds detected in each sample collected from the 58 sites each month during 1993-95. All reported detections were counted (a common reporting level was not used). 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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