PASSO FUNDO
Rio Grande do Sul · URUGUAI
Capacity
1,589 hm³
Coordinates
-27.554°N, 52.741°W
Operator
ONS
70.3% full
Current fill
70.3%vs 7 days ago
-4.3%losing
vs 1 year ago
N/A7-day trend
↓falling
Drought context
Storage vs October average
83%of normal
70.3% full on 2026-10-12, against an average of 84.4% for October across 2 years of readings (-14.1 points).
Rain over the last three months · 21 September 2026
Very wet
In the three months to 21 September 2026 the area around PASSO FUNDO 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 +1.92). Rain, not storage. Brazil drought figures →
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 October 12, 2026, PASSO FUNDO is filled to 70.3% of its total capacity, holding roughly 988 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 fallen by 4.3 percentage points.
Across the readings we hold for PASSO FUNDO — 52 data points between October 31, 2025 and October 12, 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
- 70.3%
- Water stored
- 988 hm³
- Total capacity
- 1,589 hm³
- Usable capacity
- 1,405 hm³
- 7-day change
- ▼ 4.3 pts
- Primary use
- Hydroelectric power
- River
- PASSO FUNDO
- River basin
- URUGUAI
- Operator
- ONS
- Coordinates
- 27.554°S, 52.741°W
- Last updated
- October 12, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 12 Oct 2026 | 70.3% | 988 |
| 9 Oct 2026 | 71.1% | 998 |
| 2 Oct 2026 | 74.7% | 1,049 |
| 25 Sep 2026 | 74.7% | 1,049 |
| 18 Sep 2026 | 75.0% | 1,054 |
| 11 Sep 2026 | 75.2% | 1,056 |
| 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 |