Michael T. Barbour and colleagues of the Environmental Protection Agency (EPA) provide the second edition of the publication Rapid Bioassessment Protocols For Use in Streams and Wadeable Rivers: Periphyton, Benthic Macroinvertebrates, and Fish. The document, which may be downloaded at the site, covers several important topics including "The Concept of Rapid Bioassessment," "Application of Rapid...

This incredibly comprehensive and well-organized site from the USGS offers visitors all sorts of information on water quality studies from all over the United States. By clicking on a map of the US, users are taken to a list of study areas, with over fifty to pick from. By clicking on an individual study, such as the Western Lake Michigan Drainages, the user is provided with a description of the...