ITAUBA
Rio Grande do Sul · JACUI
Useful capacity
158.2 hm³
Coordinates
29.259°S, 53.236°W
Operator
ONS
59.2% of useful capacity
Current fill
59.2%of useful capacity
vs 7 days ago
-12.5 pplosing
vs 1 year ago
-15.0 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
86%of normal
59.2% full on 2026-10-26, against an average of 69.2% for October across 2 years of readings (-10.0 points).
Rain over the last three months · 11 October 2026
Extremely wet
In the three months to 11 October 2026 the area around ITAUBA had exceptionally wet conditions, a surplus seen about one year in forty. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index +2.89). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 620 hm³ |
| Usable capacity | 158.2 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | JACUÍ |
| Province | Rio Grande do Sul |
| River basin | JACUI |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 29.259°S, 53.236°W · Open in Google Maps
About ITAUBA
As of October 26, 2026, ITAUBA is at 59.2% of useful capacity, holding 93.6 hm³ of 158.2 hm³. Of the 620 hm³ total capacity, that is 15.1%. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 12.5 percentage points, and it is 15.0 points below its level on the same date a year earlier.
Across the readings we hold for ITAUBA — 65 data points between October 26, 2025 and October 26, 2026 — the level has ranged from a low of 36.6% (February 6, 2026) to a high of 90.9% (April 10, 2026). On average the reservoir is fullest around November and at its lowest around March.
It is operated by ONS primarily for hydroelectric power. It lies within the JACUI basin at 29.259°S, 53.236°W.
Key facts
- Current fill level
- 59.2% of useful capacity
- Water stored
- 93.6 hm³
- Total capacity
- 620 hm³
- Usable capacity
- 158.2 hm³
- 7-day change
- ▼ 12.5 pp
- Year-on-year
- ▼ 15.0 pp
- Primary use
- Hydroelectric power
- River
- JACUÍ
- River basin
- JACUI
- Operator
- ONS
- Coordinates
- 29.259°S, 53.236°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 59.1% | 93.6 |
| 25 Oct 2026 | 65.8% | 104.1 |
| 24 Oct 2026 | 63.8% | 100.9 |
| 23 Oct 2026 | 60.2% | 95.2 |
| 22 Oct 2026 | 62.0% | 98.1 |
| 21 Oct 2026 | 64.0% | 101.3 |
| 20 Oct 2026 | 69.4% | 109.8 |
| 19 Oct 2026 | 71.7% | 113.4 |
| 18 Oct 2026 | 70.7% | 111.8 |
| 17 Oct 2026 | 70.5% | 111.6 |
| 16 Oct 2026 | 65.8% | 104.1 |
| 15 Oct 2026 | 59.1% | 93.6 |