System Status
Nero
Norway — dam levels — latest data & analysis
of total capacity
Stored
23800.6 MCM
Total Capacity
74715.0 MCM
Last Updated
2026-04-25
System Capacity
All 5 Dams
NO2-Southwest
Sørlandet/Vestlandet
Stored: 7987.71 MCM
Capacity: 28475.0 MCM
NO4-North
Nord-Norge
Stored: 10833.32 MCM
Capacity: 15555.0 MCM
NO5-West
Vestlandet
Stored: 2582.43 MCM
Capacity: 12580.0 MCM
NO1-East
Østlandet
Stored: 801.20 MCM
Capacity: 9520.0 MCM
NO3-Central
Midt-Norge
Stored: 1595.93 MCM
Capacity: 8585.0 MCM
How to Read This Dashboard
This dashboard tracks reservoir fill levels across Norway. Each card shows a dam's current water storage as a percentage of its total capacity. The system checks for new data every six hours — some upstream sources update daily, others weekly or monthly.
What the Numbers Mean
Percentage represents how full a reservoir is relative to its maximum design capacity. MCM (Million Cubic Metres) is the standard unit for measuring reservoir volumes. Below 20% capacity, evaporation losses accelerate, water quality degrades as sediment concentrates, and extraction becomes physically harder as water levels drop below outlet pipes.
Severity Indicators
Dams are colour-coded by fill level: red (critical) means below 20% of capacity, amber (warning) indicates 20–40%, and green (healthy) means above 40%. Click any dam card to explore its full history and year-on-year comparisons.