Sau
Barcelona · Catalonia · Cuencas Internas de Cataluña
Capacity
165 hm³
Coordinates
41.976°N, 2.384°E
Operator
ACA
69.1% full
Current fill
69.1%vs 13 Oct 2026
-1.8 pplosing
vs 1 year ago
+12.1 ppyear-over-year
Trend
↓falling
Drought context
Storage vs October average
130%of normal
69.1% full on 2026-10-19, against an average of 53.3% for October across 9 years of readings (+15.8 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around Sau had rain close to normal for the season. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −0.12). Rain, not storage.
EU drought indicator · 11 October 2026
Recoverydeficit easing
The European Drought Observatory's combined reading of rain, soil moisture and vegetation at this point. Watch means rain has been short, Warning that the soil has dried out, Alert that vegetation is visibly stressed; Recovery means the shortfall is easing. Ground conditions, not the reservoir's storage. Spain drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 165 hm³ |
| Primary use | Multi-purpose |
| Operator | ACA |
| Province | Barcelona |
| Region | Catalonia |
| River basin | Cuencas Internas de Cataluña |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 41.976°N, 2.384°E · Open in Google Maps
About Sau
As of October 19, 2026, Sau is filled to 69.1% of its total capacity, holding 114 hm³ of water out of a maximum 165 hm³. At this level the reservoir is within its normal operating range.
Since October 13, 2026 the fill level has fallen by 1.8 percentage points, and it is 12.1 points above its level on the same date a year earlier.
Across the readings we hold for Sau — 419 data points between October 16, 2018 and October 19, 2026 — the level has ranged from a low of 1.2% (March 5, 2024) to a high of 100.0% (January 28, 2020). On average the reservoir is fullest around June and at its lowest around October.
It is operated by ACA primarily for multiple purposes. It lies within the Cuencas Internas de Cataluña basin at 41.976°N, 2.384°E.
Key facts
- Current fill level
- 69.1% of total capacity
- Water stored
- 114 hm³
- Total capacity
- 165 hm³
- Change since October 13, 2026
- ▼ 1.8 pp
- Year-on-year
- ▲ 12.1 pp
- Primary use
- Multipurpose
- River basin
- Cuencas Internas de Cataluña
- Operator
- ACA
- Coordinates
- 41.976°N, 2.384°E
- Last updated
- October 19, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 19 Oct 2026 | 69.1% | 114 |
| 13 Oct 2026 | 70.9% | 117 |
| 6 Oct 2026 | 68.5% | 113 |
| 29 Sep 2026 | 70.3% | 116 |
| 22 Sep 2026 | 73.3% | 121 |
| 15 Sep 2026 | 73.9% | 122 |
| 8 Sep 2026 | 73.3% | 121 |
| 1 Sep 2026 | 74.5% | 123 |
| 25 Aug 2026 | 77.0% | 127 |
| 18 Aug 2026 | 78.8% | 130 |
| 11 Aug 2026 | 79.4% | 131 |
| 4 Aug 2026 | 80.0% | 132 |