RESERVOIR LEVELS IN SPAIN
Official data on Spain's national water reserve.
CURRENT RESERVE
STORED WATER
WEEKLY CHANGE
PREVIOUS YEAR
+3.31 pts · VS 2025
10-YEAR MEAN
+14.17 pts
INTERACTIVE MAP AND COMPARISON
Data by autonomous community and national trend
Loading regional map
WHAT IS HAPPENING THIS WEEK
Weekly context for the national water reserve
Spain's reservoirs are currently 58.3% full, holding 32,687 hm³ of water out of a total capacity of 56,049 hm³ across 375 reservoirs. In the latest weekly update, the national water reserve fell by 517 hm³.
Compared with the same week of 2025: above (+3.3 points). Compared with the 10-year mean: above (+14.2 points). The basins holding the most water include Guadalete-Barbate and Cuencas Internas de Cataluña, while Ebro and Duero are among the lowest. This page brings together the current level, the history and the weekly comparison for Spain's reservoirs and main river basins.
BASINS THAT NEED ATTENTION
Weekly changes and extreme levels
LARGEST RISES
No basin rose this week.
LOWEST LEVELS
DISTRIBUTION BY BASIN
16 basins monitored with MITECO weekly data
Cantábrico Occidental
276 hm³
9 reservoirs
Cantábrico Oriental
42 hm³
4 reservoirs
Cuenca Mediterránea Andaluza
750 hm³
12 reservoirs
Cuencas Internas de Cataluña
494 hm³
7 reservoirs
Cuencas Internas del País Vasco
15 hm³
2 reservoirs
Duero
3,715 hm³
35 reservoirs
Ebro
3,546 hm³
76 reservoirs
Galicia Costa
343 hm³
11 reservoirs
Guadalete-Barbate
1,243 hm³
8 reservoirs
Guadalquivir
5,546 hm³
47 reservoirs
Guadiana
6,875 hm³
39 reservoirs
Júcar
1,476 hm³
23 reservoirs
Miño - Sil
1,671 hm³
29 reservoirs
Segura
562 hm³
15 reservoirs
Tajo
5,988 hm³
51 reservoirs
Tinto, Odiel y Piedras
145 hm³
7 reservoirs