ITAIPU
Paraná · PARANA
Capacity
29,403.91 hm³
Coordinates
-25.405°N, 54.588°W
Operator
ONS
91.2% full
Current fill
91.2%vs 7 days ago
+1.6%gaining
vs 1 year ago
N/A7-day trend
↑rising
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 29,403.91 hm³ |
| Usable capacity | 19,000 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | PARANÁ |
| Province | Paraná |
| River basin | PARANA |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -25.405, -54.588 · Open in Google Maps
About ITAIPU
As of September 9, 2026, ITAIPU is filled to 91.2% of its total capacity, holding roughly 17,330 hm³ of water out of a maximum 29,404 hm³. At this level the reservoir is high. Of that total, about 19,000 hm³ is usable (live) storage.
Over the most recent week on record the fill level has risen by 1.6 percentage points.
Across the readings we hold for ITAIPU — 52 data points between September 26, 2025 and September 9, 2026 — the level has ranged from a low of 76.6% (February 13, 2026) to a high of 98.9% (November 14, 2025). On average the reservoir is fullest around July and at its lowest around February.
It is operated by ONS primarily for hydroelectric power. It lies within the PARANA basin at 25.405°S, 54.588°W.
Key facts
- Current fill level
- 91.2%
- Water stored
- 17,330 hm³
- Total capacity
- 29,404 hm³
- Usable capacity
- 19,000 hm³
- 7-day change
- ▲ 1.6 pts
- Primary use
- Hydroelectric power
- River
- PARANÁ
- River basin
- PARANA
- Operator
- ONS
- Coordinates
- 25.405°S, 54.588°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 91.2% | 17,330 |
| 4 Sep 2026 | 89.6% | 17,030 |
| 28 Aug 2026 | 91.1% | 17,305 |
| 21 Aug 2026 | 91.7% | 17,431 |
| 14 Aug 2026 | 93.7% | 17,811 |
| 7 Aug 2026 | 95.8% | 18,212 |
| 31 Jul 2026 | 96.5% | 18,327 |
| 24 Jul 2026 | 96.3% | 18,289 |
| 17 Jul 2026 | 97.3% | 18,485 |
| 10 Jul 2026 | 98.3% | 18,668 |
| 3 Jul 2026 | 98.0% | 18,630 |
| 26 Jun 2026 | 98.3% | 18,681 |