Parish water for the Ullevålset

Sognsvann (or Sognsvannet) is a 3.3 km circumference lake just north of Oslo, Norway.Lying just within the greenbelt around Oslo, the lake is a popular recreational area, used as a camping, picnicking and bathing destination for the residents of Oslo during the summer, as well as a cross-country skiing, skating and ice fishing destination in the winter.

Alnsjøen (also called Alunsjøen) is a lake in Lillomarka in Oslo, Norway. The lake drains through the Alna River to the Oslofjord. The surrounding area was utilized for copper mining during the 18th century. The lake is used as a water reservoir for the city of Oslo.