Jarrama

As of September 1, 2026, Jarrama is filled to 67.4% of its total capacity, holding roughly 29 hm³ of water out of a maximum 43 hm³. At this level the reservoir is within its normal operating range.

Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 4.7 points below its level on the same date a year earlier.

Across the readings we hold for Jarrama — 418 data points between September 4, 2018 and September 1, 2026 — the level has ranged from a low of 37.2% (December 6, 2022) to a high of 100.0% (April 2, 2024). On average the reservoir is fullest around April and at its lowest around October.

It is operated by Tinto, Odiel y Piedras. It lies within the Tinto, Odiel y Piedras basin at 0.000°N, 0.000°E.