BALBINA
Amazonas · AMAZONAS
Capacity
20,006.22 hm³
Coordinates
-1.914°N, 59.474°W
Operator
ONS
89.2% full
Current fill
89.2%vs 7 days ago
-0.9%losing
vs 1 year ago
-1.2%year-over-year
7-day trend
→stable
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 20,006.22 hm³ |
| Usable capacity | 10,209.79 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | UATUMA |
| Province | Amazonas |
| River basin | AMAZONAS |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -1.914, -59.474 · Open in Google Maps
About BALBINA
As of July 28, 2026, BALBINA is filled to 89.2% of its total capacity, holding roughly 9,103 hm³ of water out of a maximum 20,006 hm³. At this level the reservoir is high. Of that total, about 10,210 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (-0.9 pts), and it is 1.2 points below its level on the same date a year earlier.
Across the readings we hold for BALBINA — 52 data points between August 15, 2025 and July 28, 2026 — the level has ranged from a low of 46.1% (March 27, 2026) to a high of 93.0% (July 3, 2026). On average the reservoir is fullest around July and at its lowest around March.
It is operated by ONS primarily for hydroelectric power. It lies within the AMAZONAS basin at 1.914°S, 59.474°W.
Key facts
- Current fill level
- 89.2%
- Water stored
- 9,103 hm³
- Total capacity
- 20,006 hm³
- Usable capacity
- 10,210 hm³
- 7-day change
- ▼ 0.9 pts
- Year-on-year
- ▼ 1.2 pts
- Primary use
- Hydroelectric power
- River
- UATUMA
- River basin
- AMAZONAS
- Operator
- ONS
- Coordinates
- 1.914°S, 59.474°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 89.2% | 9,103 |
| 24 Jul 2026 | 90.1% | 9,198 |
| 17 Jul 2026 | 91.5% | 9,340 |
| 10 Jul 2026 | 92.4% | 9,436 |
| 3 Jul 2026 | 93.0% | 9,495 |
| 26 Jun 2026 | 92.2% | 9,411 |
| 19 Jun 2026 | 91.0% | 9,293 |
| 12 Jun 2026 | 89.6% | 9,150 |
| 5 Jun 2026 | 85.3% | 8,705 |
| 29 May 2026 | 79.4% | 8,105 |
| 22 May 2026 | 71.5% | 7,296 |
| 15 May 2026 | 67.2% | 6,857 |
Frequently asked questions
What is the current water level of BALBINA?
As of July 28, 2026, BALBINA is at 89.2% of its capacity, holding approximately 9,103 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is BALBINA reservoir full?
No. As of July 28, 2026, BALBINA is high at 89.2% of its capacity, so it is not full.
Is the water level at BALBINA rising or falling?
The level at BALBINA has been broadly stable over the latest week on record (-0.9 points).
How much water can BALBINA hold?
BALBINA has a total capacity of 20,006 hm³, of which about 10,210 hm³ is usable storage.
Where is BALBINA reservoir located?
BALBINA is located in Amazonas, Brazil, within the AMAZONAS basin (coordinates 1.914°S, 59.474°W).
What is BALBINA used for?
BALBINA is used primarily for hydroelectric power, and is managed by ONS.