| Maridalsvannet | |
|---|---|
| Maridalsvannet | |
| Location | Maridalen, Oslo |
| Primary inflows | Skjærsjøelva and Dausjøelva |
| Primary outflows | Akerselva |
| Basin countries | Norway |
| Surface area | 3.7 km² |
| Surface elevation | 149 m |
Maridalsvannet is a lake in Maridalen, Oslo, Norway. It is the largest lake in the municipitality of Oslo, and serves as the main drinking water supply for the city.[1] The lake drains via the river Akerselva to the Oslofjord. The primary inflows are Skjærsjøelva and Dausjøelva. The Hammeren Hydroelectric Power Station exploits the fall from Skjærsjøen to Maridalsvannet.