G. B. MUNHOZ
Paraná · IGUACU
Capacity
5,779 hm³
Coordinates
-26.009°N, 51.665°W
Operator
ONS
88.8% full
Current fill
88.8%vs 7 days ago
-0.4%losing
vs 1 year ago
N/A7-day trend
→stable
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 5,779 hm³ |
| Usable capacity | 3,804.69 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | IGUAÇU |
| Province | Paraná |
| River basin | IGUACU |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -26.009, -51.665 · Open in Google Maps
About G. B. MUNHOZ
As of September 9, 2026, G. B. MUNHOZ is filled to 88.8% of its total capacity, holding roughly 3,378 hm³ of water out of a maximum 5,779 hm³. At this level the reservoir is high. Of that total, about 3,805 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 G. B. MUNHOZ — 52 data points between September 26, 2025 and September 9, 2026 — the level has ranged from a low of 18.7% (April 24, 2026) to a high of 99.6% (October 3, 2025). On average the reservoir is fullest around October and at its lowest around April.
It is operated by ONS primarily for hydroelectric power. It lies within the IGUACU basin at 26.009°S, 51.665°W.
Key facts
- Current fill level
- 88.8%
- Water stored
- 3,378 hm³
- Total capacity
- 5,779 hm³
- Usable capacity
- 3,805 hm³
- 7-day change
- ▼ 0.4 pts
- Primary use
- Hydroelectric power
- River
- IGUAÇU
- River basin
- IGUACU
- Operator
- ONS
- Coordinates
- 26.009°S, 51.665°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 88.8% | 3,378 |
| 4 Sep 2026 | 89.2% | 3,394 |
| 28 Aug 2026 | 92.3% | 3,510 |
| 21 Aug 2026 | 92.5% | 3,518 |
| 14 Aug 2026 | 92.1% | 3,503 |
| 7 Aug 2026 | 92.4% | 3,517 |
| 31 Jul 2026 | 93.7% | 3,564 |
| 24 Jul 2026 | 93.0% | 3,540 |
| 17 Jul 2026 | 96.7% | 3,678 |
| 10 Jul 2026 | 94.2% | 3,583 |
| 3 Jul 2026 | 84.8% | 3,225 |
| 26 Jun 2026 | 62.3% | 2,371 |