ROSANA
Paraná · PARANAPANEMA
Capacity
1,918 hm³
Coordinates
-22.602°N, 52.869°W
Operator
ONS
Current fill
84.1%vs 7 days ago
+7.3%gaining
vs 1 year ago
0.0%year-over-year
7-day trend
↑rising
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 1,918 hm³ |
| Usable capacity | 407.56 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | PARANAPANEMA |
| Province | Paraná |
| River basin | PARANAPANEMA |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -22.602, -52.869 · Open in Google Maps
About ROSANA
As of June 10, 2026, ROSANA is filled to 84.1% of its total capacity, holding roughly 343 hm³ of water out of a maximum 1,918 hm³. At this level the reservoir is high. Of that total, about 408 hm³ is usable (live) storage.
Over the most recent week on record the fill level has risen by 7.3 percentage points, and it sits close to where it was a year earlier.
Across the readings we hold for ROSANA — 52 data points between June 27, 2025 and June 10, 2026 — the level has ranged from a low of 71.7% (December 26, 2025) to a high of 97.3% (March 13, 2026). On average the reservoir is fullest around March and at its lowest around November.
It is operated by ONS primarily for hydroelectric power. It lies within the PARANAPANEMA basin at 22.602°S, 52.869°W.
Key facts
- Current fill level
- 84.1%
- Water stored
- 343 hm³
- Total capacity
- 1,918 hm³
- Usable capacity
- 408 hm³
- 7-day change
- ▲ 7.3 pts
- Year-on-year
- No change
- Primary use
- Hydroelectric power
- River
- PARANAPANEMA
- River basin
- PARANAPANEMA
- Operator
- ONS
- Coordinates
- 22.602°S, 52.869°W
- Last updated
- June 10, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 10 Jun 2026 | 84.1% | 343 |
| 5 Jun 2026 | 76.8% | 313 |
| 29 May 2026 | 88.9% | 362 |
| 22 May 2026 | 83.6% | 341 |
| 15 May 2026 | 87.3% | 356 |
| 8 May 2026 | 88.9% | 362 |
| 1 May 2026 | 86.8% | 354 |
| 24 Apr 2026 | 85.2% | 347 |
| 17 Apr 2026 | 82.6% | 337 |
| 10 Apr 2026 | 89.4% | 364 |
| 3 Apr 2026 | 85.7% | 349 |
| 27 Mar 2026 | 91.0% | 371 |
Frequently asked questions
What is the current water level of ROSANA?
As of June 10, 2026, ROSANA is at 84.1% of its capacity, holding approximately 343 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is ROSANA reservoir full?
No. As of June 10, 2026, ROSANA is high at 84.1% of its capacity, so it is not full.
Is the water level at ROSANA rising or falling?
The level at ROSANA is rising — it gained 7.3 percentage points over the latest week on record.
How much water can ROSANA hold?
ROSANA has a total capacity of 1,918 hm³, of which about 408 hm³ is usable storage.
Where is ROSANA reservoir located?
ROSANA is located in Paraná, Brazil, within the PARANAPANEMA basin (coordinates 22.602°S, 52.869°W).
What is ROSANA used for?
ROSANA is used primarily for hydroelectric power, and is managed by ONS.