System Status

Nero

Spain — dam levels — latest data & analysis

83.5%

of total capacity

Stored

20826.0 MCM

Total Capacity

24949.0 MCM

Last Updated

2026-04-25

System Capacity

All 20 Dams

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

La Serena

92.6%

Stored: 2981.00 MCM

Capacity: 3219.0 MCM

Alcantara

Alcántara

88.3%

Stored: 2791.00 MCM

Capacity: 3160.0 MCM

Almendra

88.3%

Stored: 2338.00 MCM

Capacity: 2649.0 MCM

Buendia

Buendía

59.7%

Stored: 1017.00 MCM

Capacity: 1705.0 MCM

Cijara

Cíjara

89.3%

Stored: 1344.00 MCM

Capacity: 1505.0 MCM

Valdecanas

Valdecañas

81.1%

Stored: 1173.00 MCM

Capacity: 1446.0 MCM

Mequinenza

89.2%

Stored: 1225.00 MCM

Capacity: 1373.0 MCM

Ricobayo

86.3%

Stored: 988.00 MCM

Capacity: 1145.0 MCM

Iznajar

Iznájar

83.8%

Stored: 771.00 MCM

Capacity: 920.0 MCM

Gabriel y Galan

Gabriel y Galán

75.1%

Stored: 684.00 MCM

Capacity: 911.0 MCM

Alange

54.8%

Stored: 467.00 MCM

Capacity: 852.0 MCM

La Brena II

La Breña II

81.8%

Stored: 673.00 MCM

Capacity: 823.0 MCM

Entrepenas

Entrepeñas

79.3%

Stored: 645.00 MCM

Capacity: 813.0 MCM

Orellana

86.1%

Stored: 696.00 MCM

Capacity: 808.0 MCM

Canelles

87.0%

Stored: 591.00 MCM

Capacity: 679.0 MCM

Riano

Riaño

89.4%

Stored: 573.00 MCM

Capacity: 641.0 MCM

Andevalo

Andévalo

91.5%

Stored: 580.00 MCM

Capacity: 634.0 MCM

Negratin

Negratín

63.9%

Stored: 365.00 MCM

Capacity: 571.0 MCM

Garcia de Sola

García de Sola

85.7%

Stored: 475.00 MCM

Capacity: 554.0 MCM

Embalse del Ebro

83.0%

Stored: 449.00 MCM

Capacity: 541.0 MCM

How to Read This Dashboard

This dashboard tracks reservoir fill levels across Spain. 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