SAO ROQUE
Santa Catarina · URUGUAI
Capacity
795.67 hm³
Coordinates
-27.498°N, 50.805°W
Operator
ONS
Current fill
48.7%vs 7 days ago
-1.7%losing
vs 1 year ago
-56.3%year-over-year
7-day trend
↓falling
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 June 10, 2026, SAO ROQUE is filled to 48.7% of its total capacity, holding roughly 224 hm³ of water out of a maximum 796 hm³. At this level the reservoir is within its normal operating range. Of that total, about 459 hm³ is usable (live) storage.
Over the most recent week on record the fill level has fallen by 1.7 percentage points, and it is 56.3 points below its level on the same date a year earlier.
Across the readings we hold for SAO ROQUE — 52 data points between June 27, 2025 and June 10, 2026 — the level has ranged from a low of 18.0% (March 20, 2026) to a high of 105.0% (June 27, 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
- 48.7%
- Water stored
- 224 hm³
- Total capacity
- 796 hm³
- Usable capacity
- 459 hm³
- 7-day change
- ▼ 1.7 pts
- Year-on-year
- ▼ 56.3 pts
- Primary use
- Hydroelectric power
- River
- CANOAS
- River basin
- URUGUAI
- Operator
- ONS
- Coordinates
- 27.498°S, 50.805°W
- Last updated
- June 10, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 10 Jun 2026 | 48.7% | 224 |
| 5 Jun 2026 | 50.4% | 231 |
| 29 May 2026 | 44.3% | 204 |
| 22 May 2026 | 38.3% | 176 |
| 15 May 2026 | 38.9% | 179 |
| 8 May 2026 | 33.8% | 155 |
| 1 May 2026 | 20.7% | 95 |
| 24 Apr 2026 | 18.0% | 83 |
| 17 Apr 2026 | 21.1% | 97 |
| 10 Apr 2026 | 19.5% | 89 |
| 3 Apr 2026 | 19.0% | 87 |
| 27 Mar 2026 | 20.7% | 95 |
Frequently asked questions
What is the current water level of SAO ROQUE?
As of June 10, 2026, SAO ROQUE is at 48.7% of its capacity, holding approximately 224 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is SAO ROQUE reservoir full?
No. As of June 10, 2026, SAO ROQUE is within its normal operating range at 48.7% of its capacity, so it is not full.
Is the water level at SAO ROQUE rising or falling?
The level at SAO ROQUE is falling — it dropped 1.7 percentage points over the latest week on record.
How much water can SAO ROQUE hold?
SAO ROQUE has a total capacity of 796 hm³, of which about 459 hm³ is usable storage.
Where is SAO ROQUE reservoir located?
SAO ROQUE is located in Santa Catarina, Brazil, within the URUGUAI basin (coordinates 27.498°S, 50.805°W).
What is SAO ROQUE used for?
SAO ROQUE is used primarily for hydroelectric power, and is managed by ONS.