GarbageWatch is a project that asks members of the UCLA community to perform a coordinated waste audit using their mobile phones. Individuals use their phones to collect and upload geo-tagged images of the contents of garbage bins to help UCLA Facilities determine where new recycle bins should be placed, the effectiveness of existing recycling infrastructure, and to learn more about when, where, and what materials get thrown away on campus. Students from the Education for Sustainable Living (ESLP) Program at UCLA along with interested students involved with CENS were recruited to collect data. The use of mobile phones made it easy for the many concerned students to contribute data to this campus-wide effort. Through GarbageWatch, we also investigated models of involved individuals coverage (availability) and participation for the purpose of recruiting and maintaining the data collection campaign. For more information in regards to participant analytics for “recruitment” of individuals for campaigns, please visit the PICK project.