Orellana

As of September 7, 2026, Orellana is filled to 74.8% of its total capacity, holding roughly 604 hm³ of water out of a maximum 808 hm³. At this level the reservoir is within its normal operating range. Of that total, about 727 hm³ is usable (live) storage.

Over the most recent week on record the fill level has held broadly steady (-0.4 pts), and it is 3.4 points below its level on the same date a year earlier.

Across the readings we hold for Orellana — 419 data points between September 4, 2018 and September 7, 2026 — the level has ranged from a low of 47.8% (November 29, 2022) to a high of 93.3% (February 17, 2026). On average the reservoir is fullest around April and at its lowest around November.

It is operated by CHSU primarily for multiple purposes. It lies within the Guadiana basin at 39.027°N, 5.409°W.