CURUA-UNA
Pará · AMAZONAS
Capacity
602 hm³
Coordinates
-2.816°N, 54.301°W
Operator
ONS
87.4% full
Current fill
87.4%vs 7 days ago
-2.9%losing
vs 1 year ago
N/A7-day trend
↓falling
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 602 hm³ |
| Usable capacity | 469 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | CURUÁ-UNA |
| Province | Pará |
| River basin | AMAZONAS |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -2.816, -54.301 · Open in Google Maps
About CURUA-UNA
As of September 9, 2026, CURUA-UNA is filled to 87.4% of its total capacity, holding roughly 410 hm³ of water out of a maximum 602 hm³. At this level the reservoir is high. Of that total, about 469 hm³ is usable (live) storage.
Over the most recent week on record the fill level has fallen by 2.9 percentage points.
Across the readings we hold for CURUA-UNA — 52 data points between September 26, 2025 and September 9, 2026 — the level has ranged from a low of 11.7% (December 19, 2025) to a high of 99.6% (July 10, 2026). On average the reservoir is fullest around July and at its lowest around December.
It is operated by ONS primarily for hydroelectric power. It lies within the AMAZONAS basin at 2.816°S, 54.301°W.
Key facts
- Current fill level
- 87.4%
- Water stored
- 410 hm³
- Total capacity
- 602 hm³
- Usable capacity
- 469 hm³
- 7-day change
- ▼ 2.9 pts
- Primary use
- Hydroelectric power
- River
- CURUÁ-UNA
- River basin
- AMAZONAS
- Operator
- ONS
- Coordinates
- 2.816°S, 54.301°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 87.4% | 410 |
| 4 Sep 2026 | 90.2% | 423 |
| 28 Aug 2026 | 93.1% | 437 |
| 21 Aug 2026 | 92.9% | 436 |
| 14 Aug 2026 | 96.5% | 452 |
| 7 Aug 2026 | 97.1% | 455 |
| 31 Jul 2026 | 98.1% | 460 |
| 24 Jul 2026 | 99.6% | 467 |
| 17 Jul 2026 | 99.4% | 466 |
| 10 Jul 2026 | 99.6% | 467 |
| 3 Jul 2026 | 97.7% | 458 |
| 26 Jun 2026 | 96.2% | 451 |