El Atazar

As of September 7, 2026, El Atazar is filled to 70.7% of its total capacity, holding roughly 301 hm³ of water out of a maximum 426 hm³. At this level the reservoir is within its normal operating range. Of that total, about 383 hm³ is usable (live) storage.

Over the most recent week on record the fill level has held broadly steady (-0.9 pts), and it is 13.3 points below its level on the same date a year earlier.

Across the readings we hold for El Atazar — 419 data points between September 4, 2018 and September 7, 2026 — the level has ranged from a low of 45.8% (October 24, 2023) to a high of 99.8% (May 20, 2025). On average the reservoir is fullest around May and at its lowest around November.

It is operated by CHT primarily for multiple purposes. It lies within the Tajo basin at 40.910°N, 3.518°W.