CORUMBA-4
Goiás · PARANAIBA
Useful capacity
907.16 hm³
Coordinates
16.323°S, 48.188°W
Operator
ONS
50.1% of useful capacity
Current fill
50.1%of useful capacity
vs 7 days ago
-3.6 pplosing
vs 1 year ago
-8.7 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
88%of normal
50.1% full on 2026-10-27, against an average of 56.7% for October across 2 years of readings (-6.6 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around CORUMBA-4 had rain close to normal for the season. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index +0.31). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 3,791 hm³ |
| Usable capacity | 907.16 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | CORUMBÁ |
| Province | Goiás |
| River basin | PARANAIBA |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 16.323°S, 48.188°W · Open in Google Maps
About CORUMBA-4
As of October 27, 2026, CORUMBA-4 is at 50.1% of useful capacity, holding 454.1 hm³ of 907.16 hm³. Of the 3,791 hm³ total capacity, that is 12.0%. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 3.6 percentage points, and it is 8.7 points below its level on the same date a year earlier.
Across the readings we hold for CORUMBA-4 — 65 data points between October 27, 2025 and October 27, 2026 — the level has ranged from a low of 34.0% (January 2, 2026) to a high of 93.0% (June 19, 2026). On average the reservoir is fullest around June and at its lowest around December.
It is operated by ONS primarily for hydroelectric power. It lies within the PARANAIBA basin at 16.323°S, 48.188°W.
Key facts
- Current fill level
- 50.1% of useful capacity
- Water stored
- 454.1 hm³
- Total capacity
- 3,791 hm³
- Usable capacity
- 907.16 hm³
- 7-day change
- ▼ 3.6 pp
- Year-on-year
- ▼ 8.7 pp
- Primary use
- Hydroelectric power
- River
- CORUMBÁ
- River basin
- PARANAIBA
- Operator
- ONS
- Coordinates
- 16.323°S, 48.188°W
- Last updated
- October 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Oct 2026 | 50.1% | 454.1 |
| 26 Oct 2026 | 50.6% | 459 |
| 25 Oct 2026 | 51.3% | 465.6 |
| 24 Oct 2026 | 51.9% | 470.5 |
| 23 Oct 2026 | 51.9% | 470.5 |
| 22 Oct 2026 | 52.4% | 475.4 |
| 21 Oct 2026 | 53.1% | 482.1 |
| 20 Oct 2026 | 53.7% | 487 |
| 19 Oct 2026 | 54.2% | 492 |
| 18 Oct 2026 | 54.8% | 496.9 |
| 17 Oct 2026 | 55.5% | 503.6 |
| 16 Oct 2026 | 56.2% | 510.2 |