Aceña

As of September 7, 2026, Aceña is filled to 62.5% of its total capacity, holding roughly 15 hm³ of water out of a maximum 24 hm³. At this level the reservoir is within its normal operating range.

Over the most recent week on record the fill level has fallen by 4.2 percentage points, and it is 12.5 points below its level on the same date a year earlier.

Across the readings we hold for Aceña — 419 data points between September 4, 2018 and September 7, 2026 — the level has ranged from a low of 12.5% (October 22, 2019) to a high of 100.0% (February 9, 2021). On average the reservoir is fullest around April and at its lowest around October.

It is operated by Tajo. It lies within the Tajo basin at 0.000°N, 0.000°E.