Madison, Wisconsin: Wisconsin Department of Natural Resources
Arthropods were used to evaluate the water quality of Wisconsin streams. The biotic index based upon arthropod samples is a sensitive and effective method, for it yields information on present quality and past perturbations. Every species was assigned an index value on the basis of collections made previously and in this study, for the purpose of calculating the biotic index. Water quality determinations were then made for 53 Wisconsin streams based on these values.