Las Rozas

As of September 7, 2026, Las Rozas is filled to 42.9% of its total capacity, holding roughly 12 hm³ of water out of a maximum 28 hm³. At this level the reservoir is within its normal operating range. Of that total, about 25 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 3.6 points above its level on the same date a year earlier.

Across the readings we hold for Las Rozas — 419 data points between September 4, 2018 and September 7, 2026 — the level has ranged from a low of 0.0% (October 12, 2021) to a high of 100.0% (February 2, 2021). On average the reservoir is fullest around February and at its lowest around November.

It is operated by CHS primarily for multiple purposes. It lies within the Miño - Sil basin at 42.921°N, 6.337°W.