Price area · NO4 · Norway · NVE
Northern Norway
74.7% full
Capacity
21.1 TWh
Energy stored
15.7 TWh
Hub city
Tromsø
Last updated
2026-06-07
Current fill
74.7%vs 7 days ago
+6.7%gaining
vs 1 year ago
+2.1%year-over-year
7-day trend
↑rising
Data source: NVE — Magasinstatistikk — weekly filling degree (fyllingsgrad) and energy content (TWh) by elspot price area. Norway is a hydropower system, so storage is reported as energy, not water volume; filling degree is usable energy ÷ usable capacity. Last reading: 2026-06-07.
About Northern Norway
Northern Norway (NO4) is the Tromsø electricity price area, one of five into which Norway divides its hydropower system. Its reservoirs hold about 21.1 TWh of usable energy capacity. Filling degree is drawn down through winter and refills with snowmelt from late spring; comparing the current curve against earlier years (above) shows whether the area is running wetter or drier than normal.
Frequently asked questions
How full are reservoirs in Northern Norway right now?
As of 2026-06-07, reservoirs in Northern Norway (NO4) were 74.7% full — about 15.7 TWh of stored energy out of 21.1 TWh of usable capacity.
What is NO4?
NO4 (Northern Norway) is one of Norway’s five electricity price areas, centred on Tromsø. NVE publishes reservoir filling degree for each price area; there is no public per-reservoir feed, so this is the level the data is reported at.
Why energy (TWh) instead of cubic metres?
Norway’s power system is hydropower-based, so NVE measures reservoir storage as the electricity it can generate. Filling degree is usable energy in store divided by usable capacity.