Oslo residents are being asked to limit their water usage due to unusually low water levels in Maridalsvannet, the lake that supplies the Norwegian capital with drinking water. The warning comes amid an extended period of dry and hot weather affecting southern Norway.
In response to the situation, Oslo municipality has reduced the flow of water in the Akerselva river and started importing water from neighbouring municipalities. According to a statement by the city authorities, this decision was taken to mitigate a “pressured situation” and ensure sufficient supply for essential uses.
So far, no mandatory water restrictions have been imposed. However, residents are strongly encouraged to use only as much water as necessary. “Even though no irrigation restrictions are currently in place in Oslo, there are several reasons not to use more than needed of our valuable drinking water,” the municipality said in a press release.

Maridalsvannet is a critical part of Oslo’s water infrastructure, and its low levels reflect a broader concern in the region about climate-related water stress. Similar warnings have been issued in recent years during dry summers, prompting debate on the resilience of water systems in Nordic cities.
The city is also working to raise public awareness and has published guidelines on reducing daily water use, such as avoiding watering gardens, taking shorter showers, and postponing car washing.
Climate change and urban resilience in focus
The situation highlights broader environmental concerns. While Norway is generally seen as a water-rich country, urban centres like Oslo are increasingly exposed to climate variability, including both droughts and extreme rainfall. Experts note that climate adaptation in urban planning will be key to maintaining sustainable access to water in the years to come.
Norway’s Environment Agency (Miljodirektoratet) has previously called for improved local preparedness and long-term investments in water infrastructure, especially in light of climate forecasts predicting more frequent periods of drought.
As the summer progresses, authorities in Oslo will continue to monitor the situation closely. If conditions worsen, more restrictive measures may be considered.