PASSO FUNDO
Rio Grande do Sul · URUGUAI
Capacity
1,589 hm³
Coordinates
-27.554°N, 52.741°W
Operator
ONS
74.4% full
Current fill
74.4%vs 7 days ago
+0.4%gaining
vs 1 year ago
N/A7-day trend
→stable
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 1,589 hm³ |
| Usable capacity | 1,404.61 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | PASSO FUNDO |
| Province | Rio Grande do Sul |
| River basin | URUGUAI |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -27.554, -52.741 · Open in Google Maps
About PASSO FUNDO
As of September 9, 2026, PASSO FUNDO is filled to 74.4% of its total capacity, holding roughly 1,045 hm³ of water out of a maximum 1,589 hm³. At this level the reservoir is within its normal operating range. Of that total, about 1,405 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (+0.4 pts).
Across the readings we hold for PASSO FUNDO — 52 data points between September 26, 2025 and September 9, 2026 — the level has ranged from a low of 49.8% (June 26, 2026) to a high of 96.2% (November 14, 2025). On average the reservoir is fullest around November and at its lowest around June.
It is operated by ONS primarily for hydroelectric power. It lies within the URUGUAI basin at 27.554°S, 52.741°W.
Key facts
- Current fill level
- 74.4%
- Water stored
- 1,045 hm³
- Total capacity
- 1,589 hm³
- Usable capacity
- 1,405 hm³
- 7-day change
- ▲ 0.4 pts
- Primary use
- Hydroelectric power
- River
- PASSO FUNDO
- River basin
- URUGUAI
- Operator
- ONS
- Coordinates
- 27.554°S, 52.741°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 74.4% | 1,045 |
| 4 Sep 2026 | 74.0% | 1,039 |
| 28 Aug 2026 | 74.1% | 1,041 |
| 21 Aug 2026 | 79.8% | 1,120 |
| 14 Aug 2026 | 78.8% | 1,107 |
| 7 Aug 2026 | 80.7% | 1,134 |
| 31 Jul 2026 | 77.9% | 1,095 |
| 24 Jul 2026 | 76.9% | 1,080 |
| 17 Jul 2026 | 71.7% | 1,007 |
| 10 Jul 2026 | 67.8% | 953 |
| 3 Jul 2026 | 60.5% | 851 |
| 26 Jun 2026 | 49.8% | 700 |