Las Portas

As of September 7, 2026, Las Portas is filled to 67.7% of its total capacity, holding roughly 363 hm³ of water out of a maximum 536 hm³. At this level the reservoir is within its normal operating range. Of that total, about 482 hm³ is usable (live) storage.

Over the most recent week on record the fill level has fallen by 4.7 percentage points, and it is 10.5 points below its level on the same date a year earlier.

Across the readings we hold for Las Portas — 419 data points between September 4, 2018 and September 7, 2026 — the level has ranged from a low of 14.7% (August 31, 2021) to a high of 98.5% (February 17, 2026). On average the reservoir is fullest around April and at its lowest around November.

It is operated by CHS primarily for multiple purposes. It lies within the Miño - Sil basin at 42.099°N, 7.232°W.