System Status

Nero

Portugal — dam levels — latest data & analysis

90.5%

of total capacity

Stored

9745.1 MCM

Total Capacity

10770.9 MCM

Last Updated

2026-06-23

System Capacity

All 20 Dams

Critical <20% Warning 20–40% Healthy >40%

Alqueva

93.3%

Stored: 3874.00 MCM

Capacity: 4150.0 MCM

Baixo Sabor

97.0%

Stored: 1062.00 MCM

Capacity: 1095.0 MCM

Castelo de Bode

90.8%

Stored: 994.00 MCM

Capacity: 1095.0 MCM

Cabril

90.7%

Stored: 653.00 MCM

Capacity: 720.0 MCM

Alto Rabagao

Alto Rabagão

90.0%

Stored: 512.00 MCM

Capacity: 568.7 MCM

Santa Clara

98.0%

Stored: 475.37 MCM

Capacity: 485.0 MCM

Aguieira

97.2%

Stored: 411.00 MCM

Capacity: 423.0 MCM

Alto Lindoso

77.0%

Stored: 292.00 MCM

Capacity: 379.0 MCM

Maranhao

Maranhão

5.5%

Stored: 11.38 MCM

Capacity: 205.4 MCM

Caia

86.1%

Stored: 174.73 MCM

Capacity: 203.0 MCM

Paradela

74.2%

Stored: 122.00 MCM

Capacity: 164.4 MCM

Montargil

96.9%

Stored: 159.18 MCM

Capacity: 164.3 MCM

Canicada

Caniçada

87.9%

Stored: 140.00 MCM

Capacity: 159.3 MCM

Odelouca

87.4%

Stored: 137.23 MCM

Capacity: 157.0 MCM

Carrapatelo

86.5%

Stored: 130.00 MCM

Capacity: 150.2 MCM

Ribeiradio

97.5%

Stored: 133.00 MCM

Capacity: 136.4 MCM

Alvito

97.3%

Stored: 128.99 MCM

Capacity: 132.5 MCM

Odeleite

94.8%

Stored: 123.20 MCM

Capacity: 130.0 MCM

Bemposta

93.9%

Stored: 121.00 MCM

Capacity: 128.8 MCM

Torrao

Torrão

73.5%

Stored: 91.00 MCM

Capacity: 123.9 MCM

How to Read This Dashboard

This dashboard tracks reservoir fill levels across Portugal. 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.

Latest Analysis Interactive Map