Ibai-Eder

As of September 1, 2026, Ibai-Eder is filled to 72.7% of its total capacity, holding roughly 8 hm³ of water out of a maximum 11 hm³. At this level the reservoir is within its normal operating range.

Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 9.1 points below its level on the same date a year earlier.

Across the readings we hold for Ibai-Eder — 418 data points between September 4, 2018 and September 1, 2026 — the level has ranged from a low of 63.6% (October 16, 2018) to a high of 100.0% (December 31, 2019). On average the reservoir is fullest around March and at its lowest around October.

It is operated by Cuencas Internas del País Vasco. It lies within the Cuencas Internas del País Vasco basin at 0.000°N, 0.000°E.