ITÁ
Rio Grande do Sul · URUGUAI
Useful capacity
777.54 hm³
Coordinates
27.282°S, 52.386°W
Operator
ONS
65.3% of useful capacity
Current fill
65.3%of useful capacity
vs 7 days ago
+6.1 ppgaining
vs 1 year ago
-17.2 ppyear-over-year
7-day trend
↑rising
Drought context
Storage vs October average
91%of normal
65.3% full on 2026-10-27, against an average of 71.5% for October across 2 years of readings (-6.2 points).
Rain over the last three months · 11 October 2026
Very wet
In the three months to 11 October 2026 the area around ITÁ had much more rain than normal, seen about one year in fifteen. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index +1.72). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 5,060 hm³ |
| Usable capacity | 777.54 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| Province | Rio Grande do Sul |
| River basin | URUGUAI |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 27.282°S, 52.386°W · Open in Google Maps
About ITÁ
As of October 27, 2026, ITÁ is at 65.3% of useful capacity, holding 507.3 hm³ of 777.54 hm³. Of the 5,060 hm³ total capacity, that is 10.0%. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has risen by 6.1 percentage points, and it is 17.2 points below its level on the same date a year earlier.
Across the readings we hold for ITÁ — 65 data points between October 27, 2025 and October 27, 2026 — the level has ranged from a low of 49.8% (August 28, 2026) to a high of 92.7% (November 14, 2025). On average the reservoir is fullest around November and at its lowest around February.
It is operated by ONS primarily for hydroelectric power. It lies within the URUGUAI basin at 27.282°S, 52.386°W.
Key facts
- Current fill level
- 65.3% of useful capacity
- Water stored
- 507.3 hm³
- Total capacity
- 5,060 hm³
- Usable capacity
- 777.54 hm³
- 7-day change
- ▲ 6.1 pp
- Year-on-year
- ▼ 17.2 pp
- Primary use
- Hydroelectric power
- River basin
- URUGUAI
- Operator
- ONS
- Coordinates
- 27.282°S, 52.386°W
- Last updated
- October 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Oct 2026 | 65.3% | 507.3 |
| 26 Oct 2026 | 70.0% | 544.4 |
| 25 Oct 2026 | 75.0% | 583 |
| 24 Oct 2026 | 58.2% | 452.3 |
| 23 Oct 2026 | 52.3% | 406.8 |
| 22 Oct 2026 | 55.2% | 428.9 |
| 21 Oct 2026 | 59.2% | 460.1 |
| 20 Oct 2026 | 59.2% | 460.1 |
| 19 Oct 2026 | 60.2% | 467.9 |
| 18 Oct 2026 | 60.4% | 469.2 |
| 17 Oct 2026 | 57.7% | 448.4 |
| 16 Oct 2026 | 59.5% | 462.7 |