PASSO FUNDO
Rio Grande do Sul · URUGUAI
Useful capacity
1,404.61 hm³
Coordinates
27.554°S, 52.741°W
Operator
ONS
71.4% of useful capacity
Current fill
71.4%of useful capacity
vs 7 days ago
-1.7 pplosing
vs 1 year ago
-23.7 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
85%of normal
71.4% full on 2026-10-26, against an average of 83.6% for October across 2 years of readings (-12.2 points).
Rain over the last three months · 11 October 2026
Very wet
In the three months to 11 October 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 | 1,405 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°S, 52.741°W · Open in Google Maps
About PASSO FUNDO
As of October 26, 2026, PASSO FUNDO is at 71.4% of useful capacity, holding 1,003 hm³ of 1,405 hm³. Of the 1,589 hm³ total capacity, that is 63.1%. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 1.7 percentage points, and it is 23.7 points below its level on the same date a year earlier.
Across the readings we hold for PASSO FUNDO — 65 data points between October 26, 2025 and October 26, 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
- 71.4% of useful capacity
- Water stored
- 1,003 hm³
- Total capacity
- 1,589 hm³
- Usable capacity
- 1,405 hm³
- 7-day change
- ▼ 1.7 pp
- Year-on-year
- ▼ 23.7 pp
- Primary use
- Hydroelectric power
- River
- PASSO FUNDO
- River basin
- URUGUAI
- Operator
- ONS
- Coordinates
- 27.554°S, 52.741°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 71.4% | 1,003 |
| 25 Oct 2026 | 72.0% | 1,011 |
| 24 Oct 2026 | 72.1% | 1,012 |
| 23 Oct 2026 | 71.7% | 1,007 |
| 22 Oct 2026 | 72.3% | 1,015 |
| 21 Oct 2026 | 72.8% | 1,023 |
| 20 Oct 2026 | 73.3% | 1,029 |
| 19 Oct 2026 | 73.1% | 1,027 |
| 18 Oct 2026 | 72.8% | 1,023 |
| 17 Oct 2026 | 72.4% | 1,017 |
| 16 Oct 2026 | 72.0% | 1,011 |
| 15 Oct 2026 | 71.5% | 1,005 |