The Metro Vancouver watersheds, also known as the Greater Vancouver watersheds, supply potable water to approximately 2.4 million residents in the Lower Mainland of British Columbia. They provide tap water to a land area covering more than 2,600 km², including Vancouver, Langley and Richmond. Metro Vancouver serves a total of 21 member municipalities, one electoral district, and one treaty First Nation. From west to east, the watersheds are the Capilano (19,545 hectares), the Seymour (12,375 hectares), and the Coquitlam (20,461 hectares). They are located in the North Shore Mountains and Coquitlam Mountain, respectively. Each watershed possesses a reservoir for water storage purposes, under the control of Metro Vancouver. The reservoirs are supplied by about 3.5 metres of rain and 4.5 metr