BALBINA
Amazonas · UATUMA
Useful capacity
12,367.65 hm³
Coordinates
1.914°S, 59.474°W
Operator
ONS
51.5% of useful capacity
Current fill
51.5%of useful capacity
vs 7 days ago
-2.7 pplosing
vs 1 year ago
-15.5 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
85%of normal
51.5% full on 2026-10-27, against an average of 60.8% for October across 2 years of readings (-9.3 points).
Rain over the last three months · 11 October 2026
Extremely dry
In the three months to 11 October 2026 the area around BALBINA had extremely little rain for the season, a shortfall 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 −5.20). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 22,244 hm³ |
| Usable capacity | 12,368 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| Province | Amazonas |
| River basin | UATUMA |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 1.914°S, 59.474°W · Open in Google Maps
About BALBINA
As of October 27, 2026, BALBINA is at 51.5% of useful capacity, holding 6,371 hm³ of 12,368 hm³. Of the 22,244 hm³ total capacity, that is 28.6%. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 2.7 percentage points, and it is 15.5 points below its level on the same date a year earlier.
Across the readings we hold for BALBINA — 65 data points between October 27, 2025 and October 27, 2026 — the level has ranged from a low of 45.0% (March 27, 2026) to a high of 92.7% (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 UATUMA basin at 1.914°S, 59.474°W.
Key facts
- Current fill level
- 51.5% of useful capacity
- Water stored
- 6,371 hm³
- Total capacity
- 22,244 hm³
- Usable capacity
- 12,368 hm³
- 7-day change
- ▼ 2.7 pp
- Year-on-year
- ▼ 15.5 pp
- Primary use
- Hydroelectric power
- River basin
- UATUMA
- Operator
- ONS
- Coordinates
- 1.914°S, 59.474°W
- Last updated
- October 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Oct 2026 | 51.5% | 6,371 |
| 26 Oct 2026 | 51.7% | 6,395 |
| 25 Oct 2026 | 52.1% | 6,447 |
| 24 Oct 2026 | 52.8% | 6,524 |
| 23 Oct 2026 | 53.2% | 6,576 |
| 22 Oct 2026 | 53.6% | 6,628 |
| 21 Oct 2026 | 53.9% | 6,670 |
| 20 Oct 2026 | 54.2% | 6,706 |
| 19 Oct 2026 | 54.2% | 6,706 |
| 18 Oct 2026 | 54.4% | 6,732 |
| 17 Oct 2026 | 54.7% | 6,763 |
| 16 Oct 2026 | 54.9% | 6,795 |