Ibai-Eder reservoir

Gipuzkoa/Guipúzcoa · Euskadi

Cuencas Internas del País Vasco basin Reservoirs in Euskadi

Province: Gipuzkoa/Guipúzcoa
Basin: Cuencas Internas del País Vasco
River: Ibai-Eder
Dam: Roller-compacted concrete · 1991

63.6%

Current level

7 hm³

Stored water

11 hm³

Total capacity

0.0 hm³

Weekly change

-1.0 hm³

Vs. 2025

-0.6 hm³

Vs. 10-year mean

Historical trend

Stored water volume · hm³

hm³

Weekly summary

The Ibai-Eder reservoir (embalse de Ibai-Eder), in the Cuencas Internas del País Vasco basin and linked to Azpeitia, Gipuzkoa/Guipúzcoa and Euskadi, is at 63.6% of its capacity, holding 7 hm³ against a maximum capacity of 11 hm³. It is currently steady in the latest update.

Compared with 2025: below (-9.1 points). Compared with the recent historical mean: below (-5.5 points).

Its main uses include water supply and hydroelectric power.

References
Reference	Level	Difference
Previous week	63.6%	0.0 pts
Same week 2025	72.7%	-9.1 pts
10-year mean	69.1%	-5.5 pts

Technical data

Characteristics of the dam and its recorded uses.

Characteristics

Municipality: Azpeitia
River: Ibai-Eder
Dam type: Roller-compacted concrete
Year built: 1991
Surface area: 50 ha
Upstream: — no data
Downstream: No

Recorded uses

Water supply
Electricity
Restaurants

Not recorded: irrigation, industrial, fishing, boating, swimming, picnic.

Source: MITECO Inventory of Dams and Reservoirs.

Data: MITECO · AEMET