System Status

Nero

Portugal — dam levels — latest data & analysis

95.2%

of total capacity

Stored

10249.4 MCM

Total Capacity

10770.9 MCM

Last Updated

2026-04-25

System Capacity

All 20 Dams

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

Alqueva

97.9%

Stored: 4062.00 MCM

Capacity: 4150.0 MCM

Baixo Sabor

98.5%

Stored: 1079.00 MCM

Capacity: 1095.0 MCM

Castelo de Bode

91.4%

Stored: 1001.00 MCM

Capacity: 1095.0 MCM

Cabril

92.8%

Stored: 668.00 MCM

Capacity: 720.0 MCM

Alto Rabagao

Alto Rabagão

99.7%

Stored: 567.00 MCM

Capacity: 568.7 MCM

Santa Clara

99.4%

Stored: 481.93 MCM

Capacity: 485.0 MCM

Aguieira

86.5%

Stored: 366.00 MCM

Capacity: 423.0 MCM

Alto Lindoso

90.5%

Stored: 343.00 MCM

Capacity: 379.0 MCM

Maranhao

Maranhão

94.9%

Stored: 194.93 MCM

Capacity: 205.4 MCM

Caia

89.1%

Stored: 180.92 MCM

Capacity: 203.0 MCM

Paradela

88.8%

Stored: 146.00 MCM

Capacity: 164.4 MCM

Montargil

97.8%

Stored: 160.75 MCM

Capacity: 164.3 MCM

Canicada

Caniçada

76.0%

Stored: 121.00 MCM

Capacity: 159.3 MCM

Odelouca

90.0%

Stored: 141.22 MCM

Capacity: 157.0 MCM

Carrapatelo

88.5%

Stored: 133.00 MCM

Capacity: 150.2 MCM

Ribeiradio

95.3%

Stored: 130.00 MCM

Capacity: 136.4 MCM

Alvito

100.0%

Stored: 132.50 MCM

Capacity: 132.5 MCM

Odeleite

98.9%

Stored: 128.56 MCM

Capacity: 130.0 MCM

Bemposta

93.2%

Stored: 120.00 MCM

Capacity: 128.8 MCM

Torrao

Torrão

74.7%

Stored: 92.60 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