PASSO REAL
Rio Grande do Sul · JACUI
Capacity
3,646 hm³
Coordinates
-29.015°N, 53.187°W
Operator
ONS
64.4% full
Current fill
64.4%vs 7 days ago
+0.3%gaining
vs 1 year ago
N/A7-day trend
→stable
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 3,646 hm³ |
| Usable capacity | 3,356.8 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, -53.187 · Open in Google Maps
About PASSO REAL
As of September 9, 2026, PASSO REAL is filled to 64.4% of its total capacity, holding roughly 2,163 hm³ of water out of a maximum 3,646 hm³. At this level the reservoir is within its normal operating range. Of that total, about 3,357 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (+0.3 pts).
Across the readings we hold for PASSO REAL — 52 data points between September 26, 2025 and September 9, 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
- 64.4%
- Water stored
- 2,163 hm³
- Total capacity
- 3,646 hm³
- Usable capacity
- 3,357 hm³
- 7-day change
- ▲ 0.3 pts
- Primary use
- Hydroelectric power
- River
- JACUÍ
- River basin
- JACUI
- Operator
- ONS
- Coordinates
- 29.015°S, 53.187°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 64.4% | 2,163 |
| 4 Sep 2026 | 64.2% | 2,154 |
| 28 Aug 2026 | 63.9% | 2,143 |
| 21 Aug 2026 | 64.1% | 2,150 |
| 14 Aug 2026 | 67.0% | 2,249 |
| 7 Aug 2026 | 64.3% | 2,159 |
| 31 Jul 2026 | 68.2% | 2,289 |
| 24 Jul 2026 | 67.7% | 2,273 |
| 17 Jul 2026 | 64.4% | 2,161 |
| 10 Jul 2026 | 66.3% | 2,226 |
| 3 Jul 2026 | 64.2% | 2,154 |
| 26 Jun 2026 | 59.1% | 1,983 |