System Status

Nero

Portugal — dam levels — latest data & analysis

87.0%

of total capacity

Stored

9366.9 MCM

Total Capacity

10770.9 MCM

Last Updated

2026-07-20

System Capacity

All 20 Dams

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

Alqueva

87.5%

Stored: 3629.00 MCM

Capacity: 4150.0 MCM

Baixo Sabor

93.4%

Stored: 1023.00 MCM

Capacity: 1095.0 MCM

Castelo de Bode

89.0%

Stored: 975.00 MCM

Capacity: 1095.0 MCM

Cabril

87.6%

Stored: 631.00 MCM

Capacity: 720.0 MCM

Alto Rabagao

Alto Rabagão

83.3%

Stored: 474.00 MCM

Capacity: 568.7 MCM

Santa Clara

96.2%

Stored: 466.31 MCM

Capacity: 485.0 MCM

Aguieira

90.5%

Stored: 383.00 MCM

Capacity: 423.0 MCM

Alto Lindoso

69.9%

Stored: 265.00 MCM

Capacity: 379.0 MCM

Maranhao

Maranhão

82.5%

Stored: 169.35 MCM

Capacity: 205.4 MCM

Caia

79.6%

Stored: 161.51 MCM

Capacity: 203.0 MCM

Paradela

63.3%

Stored: 104.00 MCM

Capacity: 164.4 MCM

Montargil

88.5%

Stored: 145.42 MCM

Capacity: 164.3 MCM

Canicada

Caniçada

81.0%

Stored: 129.00 MCM

Capacity: 159.3 MCM

Odelouca

83.5%

Stored: 131.10 MCM

Capacity: 157.0 MCM

Carrapatelo

87.2%

Stored: 131.00 MCM

Capacity: 150.2 MCM

Ribeiradio

90.9%

Stored: 124.00 MCM

Capacity: 136.4 MCM

Alvito

84.9%

Stored: 112.55 MCM

Capacity: 132.5 MCM

Odeleite

89.5%

Stored: 116.40 MCM

Capacity: 130.0 MCM

Bemposta

90.8%

Stored: 117.00 MCM

Capacity: 128.8 MCM

Torrao

Torrão

64.0%

Stored: 79.30 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