JIRAU
Rondônia · AMAZONAS
Capacity
2,746.73 hm³
Coordinates
-9.268°N, 64.649°W
Operator
ONS
Current fill
100.0%vs 7 days ago
0.0%stable
vs 1 year ago
+2.8%year-over-year
7-day trend
→stable
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 2,746.73 hm³ |
| Usable capacity | 1,511.14 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | MADEIRA |
| Province | Rondônia |
| River basin | AMAZONAS |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -9.268, -64.649 · Open in Google Maps
About JIRAU
As of June 10, 2026, JIRAU is filled to 100.0% of its total capacity, holding roughly 1,511 hm³ of water out of a maximum 2,747 hm³. At this level the reservoir is high. Of that total, about 1,511 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 2.8 points above its level on the same date a year earlier.
Across the readings we hold for JIRAU — 52 data points between June 27, 2025 and June 10, 2026 — the level has ranged from a low of 0.9% (August 15, 2025) to a high of 100.2% (February 20, 2026). On average the reservoir is fullest around February and at its lowest around October.
It is operated by ONS primarily for hydroelectric power. It lies within the AMAZONAS basin at 9.268°S, 64.649°W.
Key facts
- Current fill level
- 100.0%
- Water stored
- 1,511 hm³
- Total capacity
- 2,747 hm³
- Usable capacity
- 1,511 hm³
- 7-day change
- No change
- Year-on-year
- ▲ 2.8 pts
- Primary use
- Hydroelectric power
- River
- MADEIRA
- River basin
- AMAZONAS
- Operator
- ONS
- Coordinates
- 9.268°S, 64.649°W
- Last updated
- June 10, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 10 Jun 2026 | 100.0% | 1,511 |
| 5 Jun 2026 | 100.0% | 1,511 |
| 29 May 2026 | 100.0% | 1,511 |
| 22 May 2026 | 99.8% | 1,508 |
| 15 May 2026 | 100.0% | 1,511 |
| 8 May 2026 | 100.0% | 1,511 |
| 1 May 2026 | 100.0% | 1,511 |
| 24 Apr 2026 | 100.0% | 1,511 |
| 17 Apr 2026 | 100.0% | 1,511 |
| 10 Apr 2026 | 100.0% | 1,511 |
| 3 Apr 2026 | 100.2% | 1,515 |
| 27 Mar 2026 | 100.0% | 1,511 |
Frequently asked questions
What is the current water level of JIRAU?
As of June 10, 2026, JIRAU is at 100.0% of its capacity, holding approximately 1,511 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is JIRAU reservoir full?
JIRAU is essentially full, sitting at 100.0% of capacity as of June 10, 2026.
Is the water level at JIRAU rising or falling?
The level at JIRAU has been broadly stable over the latest week on record (0.0 points).
How much water can JIRAU hold?
JIRAU has a total capacity of 2,747 hm³, of which about 1,511 hm³ is usable storage.
Where is JIRAU reservoir located?
JIRAU is located in Rondônia, Brazil, within the AMAZONAS basin (coordinates 9.268°S, 64.649°W).
What is JIRAU used for?
JIRAU is used primarily for hydroelectric power, and is managed by ONS.