Itoiz reservoir

Navarra · Navarra

Ebro basin Reservoirs in Navarra

Province: Navarra
Basin: Ebro
River: Irati
Dam: Gravity · 2002

31.7%

Current level

132 hm³

Stored water

417 hm³

Total capacity

-3.0 hm³

Weekly change

-49.0 hm³

Vs. 2025

-34.7 hm³

Vs. 10-year mean

Historical trend

Stored water volume · hm³

hm³

Weekly summary

The Itoiz reservoir (embalse de Itoiz), in the Ebro basin and linked to Longuida, Aoiz, Arce, Navarra and Navarra, is at 31.7% of its capacity, holding 132 hm³ against a maximum capacity of 417 hm³. It is currently falling, by 3.0 hm³ this week.

Compared with 2025: below (-11.8 points). Compared with the recent historical mean: below (-8.3 points).

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

References
Reference	Level	Difference
Previous week	32.4%	-0.7 pts
Same week 2025	43.4%	-11.8 pts
10-year mean	40.0%	-8.3 pts

Technical data

Characteristics of the dam and its recorded uses.

Characteristics

Municipality: Longuida, Aoiz, Arce
River: Irati
Dam type: Gravity
Year built: 2002
Surface area: 1,100 ha
Upstream: Irabia
Downstream: Mequinenza

Recorded uses

Water supply
Irrigation
Electricity
Industrial
Fishing
Boating

Not recorded: swimming, picnic, restaurants.

Source: MITECO Inventory of Dams and Reservoirs.

Data: MITECO · AEMET