C.BRANCO-1
Minas Gerais · PARANAIBA
Capacity
241.13 hm³
Coordinates
-18.788°N, 48.146°W
Operator
ONS
32.4% full
Current fill
32.4%vs 7 days ago
+10.0%gaining
vs 1 year ago
-5.7%year-over-year
7-day trend
↑rising
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 241.13 hm³ |
| Usable capacity | 12.86 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | ARAGUARI-MG |
| Province | Minas Gerais |
| River basin | PARANAIBA |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -18.788, -48.146 · Open in Google Maps
About C.BRANCO-1
As of July 28, 2026, C.BRANCO-1 is filled to 32.4% of its total capacity, holding roughly 4 hm³ of water out of a maximum 241 hm³. At this level the reservoir is low. Of that total, about 13 hm³ is usable (live) storage.
Over the most recent week on record the fill level has risen by 10.0 percentage points, and it is 5.7 points below its level on the same date a year earlier.
Across the readings we hold for C.BRANCO-1 — 52 data points between August 15, 2025 and July 28, 2026 — the level has ranged from a low of 0.0% (August 22, 2025) to a high of 76.8% (November 14, 2025). On average the reservoir is fullest around November and at its lowest around August.
It is operated by ONS primarily for hydroelectric power. It lies within the PARANAIBA basin at 18.788°S, 48.146°W.
Key facts
- Current fill level
- 32.4%
- Water stored
- 4 hm³
- Total capacity
- 241 hm³
- Usable capacity
- 13 hm³
- 7-day change
- ▲ 10.0 pts
- Year-on-year
- ▼ 5.7 pts
- Primary use
- Hydroelectric power
- River
- ARAGUARI-MG
- River basin
- PARANAIBA
- Operator
- ONS
- Coordinates
- 18.788°S, 48.146°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 32.4% | 4 |
| 24 Jul 2026 | 22.5% | 3 |
| 17 Jul 2026 | 32.4% | 4 |
| 10 Jul 2026 | 45.2% | 6 |
| 3 Jul 2026 | 56.6% | 7 |
| 26 Jun 2026 | 59.5% | 8 |
| 19 Jun 2026 | 63.8% | 8 |
| 12 Jun 2026 | 33.8% | 4 |
| 5 Jun 2026 | 11.2% | 1 |
| 29 May 2026 | 45.2% | 6 |
| 22 May 2026 | 48.1% | 6 |
| 15 May 2026 | 38.1% | 5 |
Frequently asked questions
What is the current water level of C.BRANCO-1?
As of July 28, 2026, C.BRANCO-1 is at 32.4% of its capacity, holding approximately 4 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is C.BRANCO-1 reservoir full?
No. As of July 28, 2026, C.BRANCO-1 is low at 32.4% of its capacity, so it is not full.
Is the water level at C.BRANCO-1 rising or falling?
The level at C.BRANCO-1 is rising — it gained 10.0 percentage points over the latest week on record.
How much water can C.BRANCO-1 hold?
C.BRANCO-1 has a total capacity of 241 hm³, of which about 13 hm³ is usable storage.
Where is C.BRANCO-1 reservoir located?
C.BRANCO-1 is located in Minas Gerais, Brazil, within the PARANAIBA basin (coordinates 18.788°S, 48.146°W).
What is C.BRANCO-1 used for?
C.BRANCO-1 is used primarily for hydroelectric power, and is managed by ONS.