CURUA-UNA
Pará · AMAZONAS
Capacity
602 hm³
Coordinates
-2.816°N, 54.301°W
Operator
ONS
97.7% full
Current fill
97.7%vs 7 days ago
-1.9%losing
vs 1 year ago
+0.6%year-over-year
7-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 July 28, 2026, CURUA-UNA is filled to 97.7% of its total capacity, holding roughly 458 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 1.9 percentage points, and it sits close to where it was a year earlier.
Across the readings we hold for CURUA-UNA — 52 data points between August 15, 2025 and July 28, 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
- 97.7%
- Water stored
- 458 hm³
- Total capacity
- 602 hm³
- Usable capacity
- 469 hm³
- 7-day change
- ▼ 1.9 pts
- Year-on-year
- ▲ 0.6 pts
- Primary use
- Hydroelectric power
- River
- CURUÁ-UNA
- River basin
- AMAZONAS
- Operator
- ONS
- Coordinates
- 2.816°S, 54.301°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 97.7% | 458 |
| 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 |
| 19 Jun 2026 | 97.1% | 455 |
| 12 Jun 2026 | 96.5% | 452 |
| 5 Jun 2026 | 94.2% | 442 |
| 29 May 2026 | 93.1% | 437 |
| 22 May 2026 | 97.3% | 456 |
| 15 May 2026 | 97.3% | 456 |
Frequently asked questions
What is the current water level of CURUA-UNA?
As of July 28, 2026, CURUA-UNA is at 97.7% of its capacity, holding approximately 458 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is CURUA-UNA reservoir full?
CURUA-UNA is essentially full, sitting at 97.7% of capacity as of July 28, 2026.
Is the water level at CURUA-UNA rising or falling?
The level at CURUA-UNA is falling — it dropped 1.9 percentage points over the latest week on record.
How much water can CURUA-UNA hold?
CURUA-UNA has a total capacity of 602 hm³, of which about 469 hm³ is usable storage.
Where is CURUA-UNA reservoir located?
CURUA-UNA is located in Pará, Brazil, within the AMAZONAS basin (coordinates 2.816°S, 54.301°W).
What is CURUA-UNA used for?
CURUA-UNA is used primarily for hydroelectric power, and is managed by ONS.