We strive to restore and preserve Oakland's creeks, lakes and watershed to create a thriving urban ecosystem. We work with our community to reduce water use and keep harmful materials out of the environment. Oakland's watershed is comprised of 15 main creeks, over 30 tributaries, Lake Merritt and the Estuary. Click here to see a map of Oakland's creeks (click here for Spanish and here for Chinese map versions). These creeks and waterways provide numerous functions, both ecological and hydrological. In addition to their recreational and aesthetic benefits, creeks enhance biodiversity, provide habitat, recharge groundwater and reduce erosion. Because of these unique and precious resources, the City of Oakland has made the environmental protection of its creeks and waterways a priority.