G. B. MUNHOZ
Paraná · IGUACU
Useful capacity
3,804.69 hm³
Coordinates
26.009°S, 51.665°W
Operator
ONS
87.3% of useful capacity
Current fill
87.3%of useful capacity
vs 7 days ago
+1.3 ppgaining
vs 1 year ago
-11.1 ppyear-over-year
7-day trend
↑rising
Drought context
Storage vs October average
94%of normal
87.3% full on 2026-10-26, against an average of 92.4% for October across 2 years of readings (-5.1 points).
Rain over the last three months · 11 October 2026
Extremely wet
In the three months to 11 October 2026 the area around G. B. MUNHOZ had exceptionally wet conditions, a surplus seen about one year in forty. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index +2.11). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 5,779 hm³ |
| Usable capacity | 3,805 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°S, 51.665°W · Open in Google Maps
About G. B. MUNHOZ
As of October 26, 2026, G. B. MUNHOZ is at 87.3% of useful capacity, holding 3,323 hm³ of 3,805 hm³. Of the 5,779 hm³ total capacity, that is 57.5%. At this level the reservoir is high.
Over the most recent week on record the fill level has risen by 1.3 percentage points, and it is 11.1 points below its level on the same date a year earlier.
Across the readings we hold for G. B. MUNHOZ — 65 data points between October 26, 2025 and October 26, 2026 — the level has ranged from a low of 18.7% (April 24, 2026) to a high of 99.3% (November 14, 2025). On average the reservoir is fullest around November 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
- 87.3% of useful capacity
- Water stored
- 3,323 hm³
- Total capacity
- 5,779 hm³
- Usable capacity
- 3,805 hm³
- 7-day change
- ▲ 1.3 pp
- Year-on-year
- ▼ 11.1 pp
- Primary use
- Hydroelectric power
- River
- IGUAÇU
- River basin
- IGUACU
- Operator
- ONS
- Coordinates
- 26.009°S, 51.665°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 87.3% | 3,323 |
| 25 Oct 2026 | 87.1% | 3,315 |
| 24 Oct 2026 | 86.6% | 3,294 |
| 23 Oct 2026 | 84.8% | 3,228 |
| 22 Oct 2026 | 85.9% | 3,268 |
| 21 Oct 2026 | 86.4% | 3,288 |
| 20 Oct 2026 | 87.1% | 3,315 |
| 19 Oct 2026 | 86.0% | 3,272 |
| 18 Oct 2026 | 86.0% | 3,271 |
| 17 Oct 2026 | 85.9% | 3,267 |
| 16 Oct 2026 | 86.7% | 3,299 |
| 15 Oct 2026 | 86.3% | 3,283 |