System Status

Nero

Portugal — dam levels — latest data & analysis

71.1%

of total capacity

Stored

7662.1 MCM

Total Capacity

10770.9 MCM

Last Updated

2026-11-10

System Capacity

All 20 Dams

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

Alqueva

78.6%

Stored: 3260.81 MCM

Capacity: 4150.0 MCM

Baixo Sabor

83.9%

Stored: 918.47 MCM

Capacity: 1095.0 MCM

Castelo de Bode

74.7%

Stored: 817.57 MCM

Capacity: 1095.0 MCM

Cabril

55.4%

Stored: 398.61 MCM

Capacity: 720.0 MCM

Alto Rabagao

Alto Rabagão

37.4%

Stored: 212.56 MCM

Capacity: 568.7 MCM

Santa Clara

90.1%

Stored: 437.01 MCM

Capacity: 485.0 MCM

Aguieira

55.2%

Stored: 233.49 MCM

Capacity: 423.0 MCM

Alto Lindoso

33.8%

Stored: 127.99 MCM

Capacity: 379.0 MCM

Maranhao

Maranhão

51.9%

Stored: 106.60 MCM

Capacity: 205.4 MCM

Caia

59.6%

Stored: 120.94 MCM

Capacity: 203.0 MCM

Paradela

55.2%

Stored: 90.68 MCM

Capacity: 164.4 MCM

Montargil

61.8%

Stored: 101.45 MCM

Capacity: 164.3 MCM

Canicada

Caniçada

89.2%

Stored: 142.11 MCM

Capacity: 159.3 MCM

Odelouca

70.6%

Stored: 110.81 MCM

Capacity: 157.0 MCM

Carrapatelo

88.7%

Stored: 133.29 MCM

Capacity: 150.2 MCM

Ribeiradio

59.1%

Stored: 80.55 MCM

Capacity: 136.4 MCM

Alvito

63.7%

Stored: 84.38 MCM

Capacity: 132.5 MCM

Odeleite

68.6%

Stored: 89.13 MCM

Capacity: 130.0 MCM

Bemposta

91.6%

Stored: 117.97 MCM

Capacity: 128.8 MCM

Torrao

Torrão

62.7%

Stored: 77.65 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