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Home> Water & Environment > Water Supply > System Maps Water System Maps The EBMUD water supply system consists of a network of reservoirs, aqueducts, treatment plants, and distribution facilities that extends from its principal water source, the Mokelumne River Basin in the Sierra Nevada range, to the East San Francisco Bay Area. The map below is a PDF  file that can be viewed & printed with Adobe Acrobat Reader, a free software.  Water Supply System Map (776kb) Site Map      Search     Contact Us     Publications      Disclaimer