SAO JOSE
Rio Grande do Sul · IJUI
Useful capacity
23.72 hm³
Coordinates
28.177°S, 54.813°W
Operator
ONS
80.5% of useful capacity
Current fill
80.5%of useful capacity
vs 7 days ago
-15.4 pplosing
vs 1 year ago
+30.3 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
133%of normal
80.5% full on 2026-10-27, against an average of 60.6% for October across 2 years of readings (+19.9 points).
Rain over the last three months · 11 October 2026
Moderately wet
In the three months to 11 October 2026 the area around SAO JOSE 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 +1.48). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 214.17 hm³ |
| Usable capacity | 23.72 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| Province | Rio Grande do Sul |
| River basin | IJUI |
About SAO JOSE
As of October 27, 2026, SAO JOSE is at 80.5% of useful capacity, holding 19.1 hm³ of 23.72 hm³. Of the 214.17 hm³ total capacity, that is 8.9%. At this level the reservoir is high.
Over the most recent week on record the fill level has fallen by 15.4 percentage points, and it is 30.3 points above its level on the same date a year earlier.
Across the readings we hold for SAO JOSE — 65 data points between October 27, 2025 and October 27, 2026 — the level has ranged from a low of 2.9% (December 26, 2025) to a high of 97.9% (August 21, 2026). On average the reservoir is fullest around September and at its lowest around February.
It is operated by ONS primarily for hydroelectric power. It lies within the IJUI basin at 28.177°S, 54.813°W.
Key facts
- Current fill level
- 80.5% of useful capacity
- Water stored
- 19.1 hm³
- Total capacity
- 214.17 hm³
- Usable capacity
- 23.72 hm³
- 7-day change
- ▼ 15.4 pp
- Year-on-year
- ▲ 30.3 pp
- Primary use
- Hydroelectric power
- River basin
- IJUI
- Operator
- ONS
- Coordinates
- 28.177°S, 54.813°W
- Last updated
- October 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Oct 2026 | 80.5% | 19.1 |
| 26 Oct 2026 | 72.4% | 17.2 |
| 25 Oct 2026 | 73.4% | 17.4 |
| 24 Oct 2026 | 67.3% | 16 |
| 23 Oct 2026 | 87.7% | 20.8 |
| 22 Oct 2026 | 90.7% | 21.5 |
| 21 Oct 2026 | 82.5% | 19.6 |
| 20 Oct 2026 | 95.9% | 22.7 |
| 19 Oct 2026 | 92.8% | 22 |
| 18 Oct 2026 | 92.8% | 22 |
| 17 Oct 2026 | 91.8% | 21.8 |
| 16 Oct 2026 | 87.7% | 20.8 |