CORUMBA-4
Goiás · PARANAIBA
Capacity
3,708 hm³
Coordinates
-16.323°N, 48.188°W
Operator
ONS
87.6% full
Current fill
87.6%vs 7 days ago
-1.0%losing
vs 1 year ago
+5.7%year-over-year
7-day trend
→stable
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 3,708 hm³ |
| Usable capacity | 916.89 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, -48.188 · Open in Google Maps
About CORUMBA-4
As of July 28, 2026, CORUMBA-4 is filled to 87.6% of its total capacity, holding roughly 803 hm³ of water out of a maximum 3,708 hm³. At this level the reservoir is high. Of that total, about 917 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (-1.0 pts), and it is 5.7 points above its level on the same date a year earlier.
Across the readings we hold for CORUMBA-4 — 52 data points between August 15, 2025 and July 28, 2026 — the level has ranged from a low of 33.9% (January 2, 2026) to a high of 92.8% (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
- 87.6%
- Water stored
- 803 hm³
- Total capacity
- 3,708 hm³
- Usable capacity
- 917 hm³
- 7-day change
- ▼ 1.0 pts
- Year-on-year
- ▲ 5.7 pts
- Primary use
- Hydroelectric power
- River
- CORUMBÁ
- River basin
- PARANAIBA
- Operator
- ONS
- Coordinates
- 16.323°S, 48.188°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 87.6% | 803 |
| 24 Jul 2026 | 88.6% | 812 |
| 17 Jul 2026 | 89.9% | 824 |
| 10 Jul 2026 | 91.3% | 837 |
| 3 Jul 2026 | 91.5% | 839 |
| 26 Jun 2026 | 91.6% | 840 |
| 19 Jun 2026 | 92.8% | 851 |
| 12 Jun 2026 | 92.4% | 847 |
| 5 Jun 2026 | 92.6% | 849 |
| 29 May 2026 | 92.0% | 844 |
| 22 May 2026 | 90.3% | 828 |
| 15 May 2026 | 88.4% | 810 |
Frequently asked questions
What is the current water level of CORUMBA-4?
As of July 28, 2026, CORUMBA-4 is at 87.6% of its capacity, holding approximately 803 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is CORUMBA-4 reservoir full?
No. As of July 28, 2026, CORUMBA-4 is high at 87.6% of its capacity, so it is not full.
Is the water level at CORUMBA-4 rising or falling?
The level at CORUMBA-4 has been broadly stable over the latest week on record (-1.0 points).
How much water can CORUMBA-4 hold?
CORUMBA-4 has a total capacity of 3,708 hm³, of which about 917 hm³ is usable storage.
Where is CORUMBA-4 reservoir located?
CORUMBA-4 is located in Goiás, Brazil, within the PARANAIBA basin (coordinates 16.323°S, 48.188°W).
What is CORUMBA-4 used for?
CORUMBA-4 is used primarily for hydroelectric power, and is managed by ONS.