This sourcebook consists of background information and activities related to groundwater protection. The first section focuses on the characteristics of groundwater, the water cycle, stormwater runoff, and uses of groundwater. The second section addresses household hazardous materials--both from a safety standpoint and a groundwater standpoint. The third section provides information on groundwater threats in the community as a whole, including sources of groundwater contamination in Michigan, storage and handling of materials at business sites, hazardous waste management and state laws, and water well testing. The background information and hands-on projects are directed toward junior high and middle school science and social studies teachers. Materials may be used as a supplement to science/social studies curricula, as special units on groundwater quality or household hazardous materials, or as materials for a 1-hour or 1-day discussion of groundwater quality protection. Activities include demonstrations of soil infiltration and groundwater contamination, using readily available materials. Although directed toward upper elementary and junior high school classrooms, much of the material can be tailored to either older or younger students and can be used by scout and youth leaders. (JN)