Bornos

As of September 7, 2026, Bornos is filled to 67.0% of its total capacity, holding roughly 134 hm³ of water out of a maximum 200 hm³. At this level the reservoir is within its normal operating range. Of that total, about 180 hm³ is usable (live) storage.

Over the most recent week on record the fill level has held broadly steady (-1.0 pts), and it is 7.0 points above its level on the same date a year earlier.

Across the readings we hold for Bornos — 419 data points between September 4, 2018 and September 7, 2026 — the level has ranged from a low of 7.0% (September 5, 2023) to a high of 96.5% (March 17, 2026). On average the reservoir is fullest around April and at its lowest around October.

It is operated by CHGB primarily for multiple purposes. It lies within the Guadalete-Barbate basin at 36.809°N, 5.710°W.