Jordalsvatnet is a lake in the municipality of Bergen in Hordaland county, Norway. The 0.57-square-kilometre (140-acre) artificial lake has a small dam on the western end and it is the main source of drinking water for the borough of Åsane (population: 40,000) in the city of Bergen, as well as the Ytre Sandviken parts of the neighboring Bergenhus borough. The lake lies east of the village of Eidsvåg, with the European route E39 highway running along the western shoreline.