MARIMBONDO
Minas Gerais · GRANDE
Capacity
6,150 hm³
Coordinates
-20.304°N, 49.193°W
Operator
ONS
62.2% full
Current fill
62.2%vs 7 days ago
+0.2%gaining
vs 1 year ago
+18.7%year-over-year
7-day trend
→stable
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 6,150 hm³ |
| Usable capacity | 5,260 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | GRANDE |
| Province | Minas Gerais |
| River basin | GRANDE |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -20.304, -49.193 · Open in Google Maps
About MARIMBONDO
As of July 28, 2026, MARIMBONDO is filled to 62.2% of its total capacity, holding roughly 3,271 hm³ of water out of a maximum 6,150 hm³. At this level the reservoir is within its normal operating range. Of that total, about 5,260 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (+0.2 pts), and it is 18.7 points above its level on the same date a year earlier.
Across the readings we hold for MARIMBONDO — 52 data points between August 15, 2025 and July 28, 2026 — the level has ranged from a low of 18.6% (January 9, 2026) to a high of 87.9% (April 10, 2026). On average the reservoir is fullest around April and at its lowest around December.
It is operated by ONS primarily for hydroelectric power. It lies within the GRANDE basin at 20.304°S, 49.193°W.
Key facts
- Current fill level
- 62.2%
- Water stored
- 3,271 hm³
- Total capacity
- 6,150 hm³
- Usable capacity
- 5,260 hm³
- 7-day change
- ▲ 0.2 pts
- Year-on-year
- ▲ 18.7 pts
- Primary use
- Hydroelectric power
- River
- GRANDE
- River basin
- GRANDE
- Operator
- ONS
- Coordinates
- 20.304°S, 49.193°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 62.2% | 3,271 |
| 24 Jul 2026 | 62.0% | 3,260 |
| 17 Jul 2026 | 62.8% | 3,302 |
| 10 Jul 2026 | 63.6% | 3,344 |
| 3 Jul 2026 | 64.6% | 3,400 |
| 26 Jun 2026 | 62.5% | 3,288 |
| 19 Jun 2026 | 63.1% | 3,320 |
| 12 Jun 2026 | 65.7% | 3,456 |
| 5 Jun 2026 | 72.6% | 3,818 |
| 29 May 2026 | 73.5% | 3,866 |
| 22 May 2026 | 70.5% | 3,710 |
| 15 May 2026 | 71.9% | 3,784 |
Frequently asked questions
What is the current water level of MARIMBONDO?
As of July 28, 2026, MARIMBONDO is at 62.2% of its capacity, holding approximately 3,271 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is MARIMBONDO reservoir full?
No. As of July 28, 2026, MARIMBONDO is within its normal operating range at 62.2% of its capacity, so it is not full.
Is the water level at MARIMBONDO rising or falling?
The level at MARIMBONDO has been broadly stable over the latest week on record (+0.2 points).
How much water can MARIMBONDO hold?
MARIMBONDO has a total capacity of 6,150 hm³, of which about 5,260 hm³ is usable storage.
Where is MARIMBONDO reservoir located?
MARIMBONDO is located in Minas Gerais, Brazil, within the GRANDE basin (coordinates 20.304°S, 49.193°W).
What is MARIMBONDO used for?
MARIMBONDO is used primarily for hydroelectric power, and is managed by ONS.