CURUA-UNA
Pará · AMAZONAS
Useful capacity
469 hm³
Coordinates
2.816°S, 54.301°W
Operator
ONS
53.3% of useful capacity
Current fill
53.3%of useful capacity
vs 7 days ago
-6.4 pplosing
vs 1 year ago
+1.4 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
95%of normal
53.3% full on 2026-10-26, against an average of 56.4% for October across 2 years of readings (-3.1 points).
Rain over the last three months · 11 October 2026
Extremely dry
In the three months to 11 October 2026 the area around CURUA-UNA 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 −2.35). Rain, not storage. Brazil drought figures →
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°S, 54.301°W · Open in Google Maps
About CURUA-UNA
As of October 26, 2026, CURUA-UNA is at 53.3% of useful capacity, holding 250.2 hm³ of 469 hm³. Of the 602 hm³ total capacity, that is 41.6%. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 6.4 percentage points, and it is 1.4 points above its level on the same date a year earlier.
Across the readings we hold for CURUA-UNA — 65 data points between October 26, 2025 and October 26, 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
- 53.3% of useful capacity
- Water stored
- 250.2 hm³
- Total capacity
- 602 hm³
- Usable capacity
- 469 hm³
- 7-day change
- ▼ 6.4 pp
- Year-on-year
- ▲ 1.4 pp
- Primary use
- Hydroelectric power
- River
- CURUÁ-UNA
- River basin
- AMAZONAS
- Operator
- ONS
- Coordinates
- 2.816°S, 54.301°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 53.3% | 250.2 |
| 25 Oct 2026 | 54.5% | 255.5 |
| 24 Oct 2026 | 55.1% | 258.5 |
| 23 Oct 2026 | 56.1% | 263.1 |
| 22 Oct 2026 | 57.3% | 268.5 |
| 21 Oct 2026 | 57.9% | 271.6 |
| 20 Oct 2026 | 58.8% | 275.6 |
| 19 Oct 2026 | 59.8% | 280.3 |
| 18 Oct 2026 | 60.6% | 284.3 |
| 17 Oct 2026 | 61.5% | 288.3 |
| 16 Oct 2026 | 62.4% | 292.4 |
| 15 Oct 2026 | 63.0% | 295.7 |