Students grades 4-8 can use this guide to explore the topics of water, and water conservation at a school site, while conducting an environmental community service project. Youth groups, led by a group leader, work with local experts from business, government, or environmental organizations to complete the project. Nine activity sections involve students in: (1) exploring background information; (2) mapping watersheds; (3) researching water quality impacts associated with school sites; (4) consulting with an expert; (5) choosing a service project; (6) creating an action plan; (7) tracking project progress; (8) measuring and recording results; and (9) brainstorming additional projects. Activities provide background and procedural information, as well as worksheets and discussion questions. Sidebars highlight key vocabulary. The guide contains an application for a Youth Earth Service Award and advice on how to create partnerships with community organizations. (LZ)