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

---

Figure 41. Concentrations of co-occurring compounds at various sites. Concentrations of each compound have been normalized by dividing the aquatic-life criterion value for that compound. Thus, a normalized concentration greater than 1 (shown as a horizontal line) indicates a concentration greater than the aquatic-life criterion value. The y-axis is logarithmic, so that a normalized concentration of 10 means that the concentration is 10 times the aquatic-life criterion value. Concentrations reported as not detected are plotted on the x-axis.

---

Figures: | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 |