System Status

Nero

Portugal — dam levels — latest data & analysis

78.9%

of total capacity

Stored

8494.8 MCM

Total Capacity

10770.9 MCM

Last Updated

2026-09-21

System Capacity

All 20 Dams

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

Alqueva

82.7%

Stored: 3431.68 MCM

Capacity: 4150.0 MCM

Baixo Sabor

87.8%

Stored: 962.00 MCM

Capacity: 1095.0 MCM

Castelo de Bode

91.4%

Stored: 1000.55 MCM

Capacity: 1095.0 MCM

Cabril

61.1%

Stored: 439.66 MCM

Capacity: 720.0 MCM

Alto Rabagao

Alto Rabagão

64.5%

Stored: 366.81 MCM

Capacity: 568.7 MCM

Santa Clara

93.0%

Stored: 450.88 MCM

Capacity: 485.0 MCM

Aguieira

70.2%

Stored: 296.72 MCM

Capacity: 423.0 MCM

Alto Lindoso

51.0%

Stored: 193.09 MCM

Capacity: 379.0 MCM

Maranhao

Maranhão

61.6%

Stored: 126.60 MCM

Capacity: 205.4 MCM

Caia

67.7%

Stored: 137.39 MCM

Capacity: 203.0 MCM

Paradela

54.3%

Stored: 89.28 MCM

Capacity: 164.4 MCM

Montargil

71.2%

Stored: 117.00 MCM

Capacity: 164.3 MCM

Canicada

Caniçada

80.3%

Stored: 127.93 MCM

Capacity: 159.3 MCM

Odelouca

77.1%

Stored: 120.98 MCM

Capacity: 157.0 MCM

Carrapatelo

85.7%

Stored: 128.76 MCM

Capacity: 150.2 MCM

Ribeiradio

74.4%

Stored: 101.44 MCM

Capacity: 136.4 MCM

Alvito

68.7%

Stored: 91.06 MCM

Capacity: 132.5 MCM

Odeleite

79.2%

Stored: 102.98 MCM

Capacity: 130.0 MCM

Bemposta

91.1%

Stored: 117.37 MCM

Capacity: 128.8 MCM

Torrao

Torrão

74.8%

Stored: 92.62 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