Community-based water advocacy groups in Atlanta have adopted E. coli testing methods and implemented water quality monitoring networks as a form of community science. This thesis employs a mixed methods approach that couples qualitative and quantitative data to explain the scope and effectiveness of community science in Atlanta’s watersheds. The thesis provides an empirical study of the community-based water advocacy groups based in metro Atlanta that work to better urban water quality. Then, two water quality data sets produced by the Neighborhood Water Watch and South River Watershed Alliance were analyzed to show that there are statistical differences between the E. coli levels between the Proctor Creek, South River, and Peachtree Creek Watersheds. Socio-economic demographics were mapped to show that Black residents of Atlanta primarily reside in the Proctor Creek and South River watershed.