PASSO REAL
Rio Grande do Sul · JACUI
Useful capacity
3,356.8 hm³
Coordinates
29.015°S, 53.187°W
Operator
ONS
64.8% of useful capacity
Current fill
64.8%of useful capacity
vs 7 days ago
+0.3 ppgaining
vs 1 year ago
-4.0 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs October average
97%of normal
64.8% full on 2026-10-26, against an average of 66.7% for October across 2 years of readings (-1.9 points).
Rain over the last three months · 11 October 2026
Extremely wet
In the three months to 11 October 2026 the area around PASSO REAL 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 +3.09). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 3,646 hm³ |
| Usable capacity | 3,357 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. 29.015°S, 53.187°W · Open in Google Maps
About PASSO REAL
As of October 26, 2026, PASSO REAL is at 64.8% of useful capacity, holding 2,177 hm³ of 3,357 hm³. Of the 3,646 hm³ total capacity, that is 59.7%. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (+0.3 pp), and it is 4.0 points below its level on the same date a year earlier.
Across the readings we hold for PASSO REAL — 65 data points between October 26, 2025 and October 26, 2026 — the level has ranged from a low of 49.8% (April 3, 2026) to a high of 76.6% (January 23, 2026). On average the reservoir is fullest around January and at its lowest around April.
It is operated by ONS primarily for hydroelectric power. It lies within the JACUI basin at 29.015°S, 53.187°W.
Key facts
- Current fill level
- 64.8% of useful capacity
- Water stored
- 2,177 hm³
- Total capacity
- 3,646 hm³
- Usable capacity
- 3,357 hm³
- 7-day change
- ▲ 0.3 pp
- Year-on-year
- ▼ 4.0 pp
- Primary use
- Hydroelectric power
- River
- JACUÍ
- River basin
- JACUI
- Operator
- ONS
- Coordinates
- 29.015°S, 53.187°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 64.8% | 2,177 |
| 25 Oct 2026 | 64.4% | 2,163 |
| 24 Oct 2026 | 64.2% | 2,154 |
| 23 Oct 2026 | 63.7% | 2,140 |
| 22 Oct 2026 | 63.4% | 2,129 |
| 21 Oct 2026 | 64.3% | 2,157 |
| 20 Oct 2026 | 64.7% | 2,171 |
| 19 Oct 2026 | 64.5% | 2,166 |
| 18 Oct 2026 | 64.6% | 2,168 |
| 17 Oct 2026 | 64.2% | 2,155 |
| 16 Oct 2026 | 64.1% | 2,150 |
| 15 Oct 2026 | 64.3% | 2,157 |