Amanda H. Bell Karen M. Beaulieu Thomas F. Cuffney James F. Coles Larry R. Brown Faith A. Fitzpatrick James A. Falcone Lori A. Sprague Wade L. Bryant Jr. Marie C. Peppler Cory Stephens Gerard McMahon Elise M. P. Giddings 2009 This report documents and summarizes physical, chemical, and biological data collected during 1999-2004 in a study titled Effects of Urbanization on Stream Ecosystems, undertaken as part of the U.S. Geological Survey's National Water-Quality Assessment Program. Data-collection methods and data processing are described in this report for streamflow; stream temperature; instream chemistry; instream aquatic habitat; and algal, macroinvertebrate, and fish communities. Data summaries prepared for analytical use are presented in downloadable data tables. application/pdf 10.3133/ds423 en U.S. Geological Survey Selected Physical, Chemical, and Biological Data Used to Study Urbanizing Streams in Nine Metropolitan Areas of the United States, 1999-2004 reports