Alloz reservoir

Navarra · Navarra

Ebro basin Reservoirs in Navarra

Province: Navarra
Basin: Ebro
River: Salado
Dam: Arch · 1930

30.3%

Current level

20 hm³

Stored water

66 hm³

Total capacity

0.0 hm³

Weekly change

-8.0 hm³

Vs. 2025

-4.8 hm³

Vs. 10-year mean

Historical trend

Stored water volume · hm³

hm³

Weekly summary

The Alloz reservoir (embalse de Alloz), in the Ebro basin and linked to Yerri, Guesalaz, Navarra and Navarra, is at 30.3% of its capacity, holding 20 hm³ against a maximum capacity of 66 hm³. It is currently steady in the latest update.

Compared with 2025: below (-12.1 points). Compared with the recent historical mean: below (-7.3 points).

Its main uses include water supply, irrigation and hydroelectric power.

References
Reference	Level	Difference
Previous week	30.3%	0.0 pts
Same week 2025	42.4%	-12.1 pts
10-year mean	37.6%	-7.3 pts

Technical data

Characteristics of the dam and its recorded uses.

Characteristics

Municipality: Yerri, Guesalaz
River: Salado
Dam type: Arch
Year built: 1930
Surface area: 370 ha
Upstream: — no data
Downstream: Mequinenza

Recorded uses

Water supply
Irrigation
Electricity
Fishing
Boating
Swimming

Not recorded: industrial, picnic, restaurants.

Source: MITECO Inventory of Dams and Reservoirs.

Data: MITECO · AEMET