Sau
Barcelona · Catalonia · Cuencas Internas de Cataluña
Capacity
165 hm³
Coordinates
41.976°N, 2.384°E
Operator
ACA
81.8% full
Current fill
81.8%vs 7 days ago
-2.4%losing
vs 1 year ago
+16.3%year-over-year
7-day trend
↓falling
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 165 hm³ |
| Usable capacity | 148.5 hm³ |
| Primary use | Multi-purpose |
| Operator | ACA |
| Province | Barcelona |
| Autonomous community | Catalonia |
| River basin | Cuencas Internas de Cataluña |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 41.976, 2.384 · Open in Google Maps
About Sau
As of July 27, 2026, Sau is filled to 81.8% of its total capacity, holding roughly 135 hm³ of water out of a maximum 165 hm³. At this level the reservoir is high. Of that total, about 149 hm³ is usable (live) storage.
Over the most recent week on record the fill level has fallen by 2.4 percentage points, and it is 16.3 points above its level on the same date a year earlier.
Across the readings we hold for Sau — 420 data points between July 17, 2018 and July 27, 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
- 81.8%
- Water stored
- 135 hm³
- Total capacity
- 165 hm³
- Usable capacity
- 149 hm³
- 7-day change
- ▼ 2.4 pts
- Year-on-year
- ▲ 16.3 pts
- Primary use
- Multipurpose
- River basin
- Cuencas Internas de Cataluña
- Operator
- ACA
- Coordinates
- 41.976°N, 2.384°E
- Last updated
- July 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Jul 2026 | 81.8% | 135 |
| 20 Jul 2026 | 84.2% | 139 |
| 14 Jul 2026 | 84.8% | 140 |
| 7 Jul 2026 | 81.8% | 135 |
| 30 Jun 2026 | 90.3% | 149 |
| 23 Jun 2026 | 92.1% | 152 |
| 16 Jun 2026 | 92.7% | 153 |
| 9 Jun 2026 | 95.2% | 157 |
| 2 Jun 2026 | 92.1% | 152 |
| 26 May 2026 | 91.5% | 151 |
| 19 May 2026 | 91.5% | 151 |
| 12 May 2026 | 91.5% | 151 |
Frequently asked questions
What is the current water level of Sau?
As of July 27, 2026, Sau is at 81.8% of its capacity, holding approximately 135 hm³ of water, according to embalses.net data.
Is Sau reservoir full?
No. As of July 27, 2026, Sau is high at 81.8% of its capacity, so it is not full.
Is the water level at Sau rising or falling?
The level at Sau is falling — it dropped 2.4 percentage points over the latest week on record.
How much water can Sau hold?
Sau has a total capacity of 165 hm³, of which about 149 hm³ is usable storage.
Where is Sau reservoir located?
Sau is located in Barcelona, Catalonia, Spain, within the Cuencas Internas de Cataluña basin (coordinates 41.976°N, 2.384°E).
What is Sau used for?
Sau is used primarily for multiple purposes, and is managed by ACA.