USGS Circular 1291

March 2006

Revised February 15, 2007

The Quality of Our Nation’s Waters

Pesticides in the Nation’s Streams and Ground Water, 1992–2001

By Robert J. Gilliom, Jack E. Barbash, Charles G. Crawford, Pixie A. Hamilton, Jeffrey D. Martin, Naomi Nakagaki, Lisa H. Nowell, Jonathan C. Scott, Paul E. Stackelberg, Gail P. Thelin, and David M. Wolock

circ1291Cover (108K)

View the PDF for the entire report (39,493 KB)


Introductory Material (777 KB PDF)

1. Overview of Findings and Implications (5,052 KB PDF)

2. Pesticide Primer (1,322 KB PDF)

3. NAWQA’s Approach to Pesticide Assessment (1,240 KB PDF)

4. Occurrence and Distribution in Streams and Ground Water (10,046 KB PDF)

5. Complexities: Seasonality, Mixtures, and Degradates (973 KB PDF)

6. Potential for Effects on Human Health, Aquatic Life, and Wildlife (5,166 KB PDF)

7. Prediction Where Data are Inadequate (11,990 KB PDF)

8. Long-Term Trends (589 KB PDF)

References Cited (174 KB PDF)

Glossary (147 KB PDF)

Appendix 1—Pesticide Compounds Analyzed (354 KB)

Appendix 2—Properties Affecting Transport and Fate (238 KB)

Appendix 3—Water-Quality Benchmarks (381 KB PDF)

Appendix 4—List of Abbreviations (105 KB PDF)

Appendix 5A—Stream sites sampled for pesticides in water (29.6 KB txt)

Appendix 5B—Ground water networks sampled for pesticides (400 KB txt)

Appendix 5C—Stream sites sampled for organochlorine pesticides in bed sediment and (or) whole fish (181 KB txt)

Appendix 5D—Centroids of the Ground-water networks sampled for pesticides (18.7 KB txt)

Appendix 6A—Pesticides in water from U.S. streams sampled by NAWQA (2.8 MB txt)

Appendix 6B—Pesticide compounds in ground water sampled by NAWQA (3.24 MB txt)

Appendix 6C—Organochlorine pesticide compounds in bed sediment from U.S. streams sampled by NAWQA (254 KB txt)

Appendix 6D—Organochlorine pesticide compounds in whole fish from U.S. streams sampled by NAWQA (173 KB txt)

Appendix 7—Statistical summaries of water-quality data

Appendix 8—Methods and approach for NAWQA pesticide data analysis

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