Recently released by the US Geological Survey USGS in cooperation with the US Environmental Protection Agency (EPA), this report summarizes regional and national information collected by the USGS between 1991 and 1995 for seven major-use herbicides. The report is offered in text or .pdf format and includes an abstract, a list of abbreviations and acronyms, and numerous charts and tables.

The Pesticide National Synthesis Project homepage offers a number of publications and reports on pesticides in the Hydrologic System. The site also features data sets, national maps of pesticide use, and some special topic reports, as well as information on the Project and its staff.

The Hydrologic Cycle: Online Meteorology Guide Web site is maintained by the Department of Atmospheric Sciences of the University of Illinois at Urbana-Champaign. The guide describes the various aspects of the hydrologic cycle, such as the water budget, evaporation, precipitation, runoff, etc. Each page contains very well done illustrations and animations of these phenomena in action, making it...