Arbón

As of October 6, 2026, Arbón is filled to 90.2% of its total capacity, holding roughly 37 hm³ of water out of a maximum 41 hm³. At this level the reservoir is high. Of that total, about 37 hm³ is usable (live) storage.

Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 2.4 points above its level on the same date a year earlier.

Across the readings we hold for Arbón — 418 data points between October 9, 2018 and October 6, 2026 — the level has ranged from a low of 82.9% (August 3, 2021) to a high of 95.1% (November 24, 2020). On average the reservoir is fullest around January and at its lowest around August.

It is operated by CHCoc primarily for multiple purposes. It lies within the Cantábrico Occidental basin at 43.464°N, 6.724°W.