ITAIPU
Paraná · PARANA
Useful capacity
19,000 hm³
Coordinates
25.405°S, 54.588°W
Operator
ONS
97.6% of useful capacity
Current fill
97.6%of useful capacity
vs 7 days ago
+2.7 ppgaining
vs 1 year ago
+2.1 ppyear-over-year
7-day trend
↑rising
Drought context
Storage vs October average
102%of normal
97.6% full on 2026-10-26, against an average of 95.8% for October across 2 years of readings (+1.8 points).
Rain over the last three months · 11 October 2026
Moderately wet
In the three months to 11 October 2026 the area around ITAIPU had more rain than normal for the season. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index +1.46). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 29,404 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°S, 54.588°W · Open in Google Maps
About ITAIPU
As of October 26, 2026, ITAIPU is at 97.6% of useful capacity, holding 18,550 hm³ of 19,000 hm³. Of the 29,404 hm³ total capacity, that is 63.1%. At this level the reservoir is high.
Over the most recent week on record the fill level has risen by 2.7 percentage points, and it is 2.1 points above its level on the same date a year earlier.
Across the readings we hold for ITAIPU — 65 data points between October 26, 2025 and October 26, 2026 — the level has ranged from a low of 76.6% (February 13, 2026) to a high of 99.7% (October 12, 2026). 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
- 97.6% of useful capacity
- Water stored
- 18,550 hm³
- Total capacity
- 29,404 hm³
- Usable capacity
- 19,000 hm³
- 7-day change
- ▲ 2.7 pp
- Year-on-year
- ▲ 2.1 pp
- Primary use
- Hydroelectric power
- River
- PARANÁ
- River basin
- PARANA
- Operator
- ONS
- Coordinates
- 25.405°S, 54.588°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 97.6% | 18,550 |
| 25 Oct 2026 | 94.6% | 17,978 |
| 24 Oct 2026 | 92.3% | 17,531 |
| 23 Oct 2026 | 91.6% | 17,406 |
| 22 Oct 2026 | 92.4% | 17,558 |
| 21 Oct 2026 | 93.4% | 17,748 |
| 20 Oct 2026 | 94.5% | 17,965 |
| 19 Oct 2026 | 95.0% | 18,042 |
| 18 Oct 2026 | 95.7% | 18,185 |
| 17 Oct 2026 | 96.0% | 18,250 |
| 16 Oct 2026 | 97.2% | 18,472 |
| 15 Oct 2026 | 98.3% | 18,681 |