System Status

Nero

Portugal — dam levels — latest data & analysis

81.6%

of total capacity

Stored

8785.3 MCM

Total Capacity

10770.9 MCM

Last Updated

2026-08-07

System Capacity

All 20 Dams

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

Alqueva

84.1%

Stored: 3489.48 MCM

Capacity: 4150.0 MCM

Baixo Sabor

89.0%

Stored: 975.00 MCM

Capacity: 1095.0 MCM

Castelo de Bode

88.2%

Stored: 966.03 MCM

Capacity: 1095.0 MCM

Cabril

73.2%

Stored: 526.70 MCM

Capacity: 720.0 MCM

Alto Rabagao

Alto Rabagão

72.3%

Stored: 411.32 MCM

Capacity: 568.7 MCM

Santa Clara

94.3%

Stored: 457.44 MCM

Capacity: 485.0 MCM

Aguieira

79.7%

Stored: 337.05 MCM

Capacity: 423.0 MCM

Alto Lindoso

52.4%

Stored: 198.76 MCM

Capacity: 379.0 MCM

Maranhao

Maranhão

71.2%

Stored: 146.34 MCM

Capacity: 205.4 MCM

Caia

72.6%

Stored: 147.32 MCM

Capacity: 203.0 MCM

Paradela

54.7%

Stored: 89.90 MCM

Capacity: 164.4 MCM

Montargil

78.8%

Stored: 129.48 MCM

Capacity: 164.3 MCM

Canicada

Caniçada

81.1%

Stored: 129.15 MCM

Capacity: 159.3 MCM

Odelouca

80.0%

Stored: 125.66 MCM

Capacity: 157.0 MCM

Carrapatelo

88.5%

Stored: 132.87 MCM

Capacity: 150.2 MCM

Ribeiradio

81.5%

Stored: 111.11 MCM

Capacity: 136.4 MCM

Alvito

72.5%

Stored: 96.04 MCM

Capacity: 132.5 MCM

Odeleite

84.1%

Stored: 109.28 MCM

Capacity: 130.0 MCM

Bemposta

97.0%

Stored: 125.00 MCM

Capacity: 128.8 MCM

Torrao

Torrão

65.7%

Stored: 81.39 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