George F. Smith Thomas Duane Byl 1994 Biomonitoring is often used to enhance or replace chemical monitoring when evaluating water quality in our streams. This report is intended to introduce the theories behind biomonitoring and some of the techniques used in a biomonitoring study. It also lists some of the advantages and limitations of biomonitoring. application/pdf 10.3133/ofr94378 en U.S. Geological Survey, Biomonitoring our streams reports