SAO ROQUE
Santa Catarina · URUGUAI
Capacity
795.67 hm³
Coordinates
-27.498°N, 50.805°W
Operator
ONS
105.0% full
Current fill
105.0%vs 7 days ago
0.0%stable
vs 1 year ago
N/A7-day trend
→stable
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 795.67 hm³ |
| Usable capacity | 458.95 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | CANOAS |
| Province | Santa Catarina |
| River basin | URUGUAI |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -27.498, -50.805 · Open in Google Maps
About SAO ROQUE
As of September 9, 2026, SAO ROQUE is filled to 105.0% of its total capacity, holding roughly 482 hm³ of water out of a maximum 796 hm³. At this level the reservoir is effectively full. Of that total, about 459 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts).
Across the readings we hold for SAO ROQUE — 52 data points between September 26, 2025 and September 9, 2026 — the level has ranged from a low of 18.0% (March 20, 2026) to a high of 105.0% (September 26, 2025). On average the reservoir is fullest around September and at its lowest around April.
It is operated by ONS primarily for hydroelectric power. It lies within the URUGUAI basin at 27.498°S, 50.805°W.
Key facts
- Current fill level
- 105.0%
- Water stored
- 482 hm³
- Total capacity
- 796 hm³
- Usable capacity
- 459 hm³
- 7-day change
- No change
- Primary use
- Hydroelectric power
- River
- CANOAS
- River basin
- URUGUAI
- Operator
- ONS
- Coordinates
- 27.498°S, 50.805°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 105.0% | 482 |
| 4 Sep 2026 | 105.0% | 482 |
| 28 Aug 2026 | 100.9% | 463 |
| 21 Aug 2026 | 105.0% | 482 |
| 14 Aug 2026 | 105.0% | 482 |
| 7 Aug 2026 | 105.0% | 482 |
| 31 Jul 2026 | 105.0% | 482 |
| 24 Jul 2026 | 105.0% | 482 |
| 17 Jul 2026 | 105.0% | 482 |
| 10 Jul 2026 | 105.0% | 482 |
| 3 Jul 2026 | 100.9% | 463 |
| 26 Jun 2026 | 40.3% | 185 |