ITAIPU
Paraná · PARANA
Capacity
29,403.91 hm³
Coordinates
-25.405°N, 54.588°W
Operator
ONS
97.2% full
Current fill
97.2%vs 7 days ago
+0.9%gaining
vs 1 year ago
+2.7%year-over-year
7-day trend
→stable
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 July 28, 2026, ITAIPU is filled to 97.2% of its total capacity, holding roughly 18,459 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 held broadly steady (+0.9 pts), and it is 2.7 points above its level on the same date a year earlier.
Across the readings we hold for ITAIPU — 52 data points between August 15, 2025 and July 28, 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
- 97.2%
- Water stored
- 18,459 hm³
- Total capacity
- 29,404 hm³
- Usable capacity
- 19,000 hm³
- 7-day change
- ▲ 0.9 pts
- Year-on-year
- ▲ 2.7 pts
- Primary use
- Hydroelectric power
- River
- PARANÁ
- River basin
- PARANA
- Operator
- ONS
- Coordinates
- 25.405°S, 54.588°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 97.2% | 18,459 |
| 24 Jul 2026 | 96.3% | 18,289 |
| 17 Jul 2026 | 97.4% | 18,510 |
| 10 Jul 2026 | 98.3% | 18,668 |
| 3 Jul 2026 | 98.0% | 18,630 |
| 26 Jun 2026 | 98.3% | 18,681 |
| 19 Jun 2026 | 92.2% | 17,520 |
| 12 Jun 2026 | 90.3% | 17,167 |
| 5 Jun 2026 | 93.9% | 17,837 |
| 29 May 2026 | 94.7% | 17,991 |
| 22 May 2026 | 95.4% | 18,134 |
| 15 May 2026 | 93.7% | 17,811 |
Frequently asked questions
What is the current water level of ITAIPU?
As of July 28, 2026, ITAIPU is at 97.2% of its capacity, holding approximately 18,459 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is ITAIPU reservoir full?
ITAIPU is essentially full, sitting at 97.2% of capacity as of July 28, 2026.
Is the water level at ITAIPU rising or falling?
The level at ITAIPU has been broadly stable over the latest week on record (+0.9 points).
How much water can ITAIPU hold?
ITAIPU has a total capacity of 29,404 hm³, of which about 19,000 hm³ is usable storage.
Where is ITAIPU reservoir located?
ITAIPU is located in Paraná, Brazil, within the PARANA basin (coordinates 25.405°S, 54.588°W).
What is ITAIPU used for?
ITAIPU is used primarily for hydroelectric power, and is managed by ONS.