ROSANA
Paraná · PARANAPANEMA
Capacity
1,918 hm³
Coordinates
-22.602°N, 52.869°W
Operator
ONS
95.2% full
Current fill
95.2%vs 7 days ago
+7.9%gaining
vs 1 year ago
+6.9%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 July 28, 2026, ROSANA is filled to 95.2% of its total capacity, holding roughly 388 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 7.9 percentage points, and it is 6.9 points above its level on the same date a year earlier.
Across the readings we hold for ROSANA — 52 data points between August 15, 2025 and July 28, 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
- 95.2%
- Water stored
- 388 hm³
- Total capacity
- 1,918 hm³
- Usable capacity
- 408 hm³
- 7-day change
- ▲ 7.9 pts
- Year-on-year
- ▲ 6.9 pts
- Primary use
- Hydroelectric power
- River
- PARANAPANEMA
- River basin
- PARANAPANEMA
- Operator
- ONS
- Coordinates
- 22.602°S, 52.869°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 95.2% | 388 |
| 24 Jul 2026 | 87.3% | 356 |
| 17 Jul 2026 | 78.9% | 322 |
| 10 Jul 2026 | 75.8% | 309 |
| 3 Jul 2026 | 73.7% | 301 |
| 26 Jun 2026 | 83.1% | 339 |
| 19 Jun 2026 | 78.4% | 320 |
| 12 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 |
Frequently asked questions
What is the current water level of ROSANA?
As of July 28, 2026, ROSANA is at 95.2% of its capacity, holding approximately 388 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is ROSANA reservoir full?
ROSANA is essentially full, sitting at 95.2% of capacity as of July 28, 2026.
Is the water level at ROSANA rising or falling?
The level at ROSANA is rising — it gained 7.9 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.