SANTA BRANCA
São Paulo · PARAIBA DO SUL
Capacity
439 hm³
Coordinates
-23.374°N, 45.870°W
Operator
ONS
40.5% full
Current fill
40.5%vs 7 days ago
-0.2%losing
vs 1 year ago
-13.1%year-over-year
7-day trend
→stable
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 439 hm³ |
| Usable capacity | 307.27 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | PARAÍBA SUL |
| Province | São Paulo |
| River basin | PARAIBA DO SUL |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -23.374, -45.870 · Open in Google Maps
About SANTA BRANCA
As of July 28, 2026, SANTA BRANCA is filled to 40.5% of its total capacity, holding roughly 125 hm³ of water out of a maximum 439 hm³. At this level the reservoir is within its normal operating range. Of that total, about 307 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 13.1 points below its level on the same date a year earlier.
Across the readings we hold for SANTA BRANCA — 52 data points between August 15, 2025 and July 28, 2026 — the level has ranged from a low of 20.8% (November 21, 2025) to a high of 53.7% (August 15, 2025). On average the reservoir is fullest around August and at its lowest around November.
It is operated by ONS primarily for hydroelectric power. It lies within the PARAIBA DO SUL basin at 23.374°S, 45.870°W.
Key facts
- Current fill level
- 40.5%
- Water stored
- 125 hm³
- Total capacity
- 439 hm³
- Usable capacity
- 307 hm³
- 7-day change
- ▼ 0.2 pts
- Year-on-year
- ▼ 13.1 pts
- Primary use
- Hydroelectric power
- River
- PARAÍBA SUL
- River basin
- PARAIBA DO SUL
- Operator
- ONS
- Coordinates
- 23.374°S, 45.870°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 40.5% | 125 |
| 24 Jul 2026 | 40.7% | 125 |
| 17 Jul 2026 | 40.9% | 126 |
| 10 Jul 2026 | 41.2% | 127 |
| 3 Jul 2026 | 41.3% | 127 |
| 26 Jun 2026 | 41.4% | 127 |
| 19 Jun 2026 | 41.2% | 127 |
| 12 Jun 2026 | 41.0% | 126 |
| 5 Jun 2026 | 41.3% | 127 |
| 29 May 2026 | 42.1% | 129 |
| 22 May 2026 | 43.4% | 134 |
| 15 May 2026 | 44.8% | 138 |
Frequently asked questions
What is the current water level of SANTA BRANCA?
As of July 28, 2026, SANTA BRANCA is at 40.5% of its capacity, holding approximately 125 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is SANTA BRANCA reservoir full?
No. As of July 28, 2026, SANTA BRANCA is within its normal operating range at 40.5% of its capacity, so it is not full.
Is the water level at SANTA BRANCA rising or falling?
The level at SANTA BRANCA has been broadly stable over the latest week on record (-0.2 points).
How much water can SANTA BRANCA hold?
SANTA BRANCA has a total capacity of 439 hm³, of which about 307 hm³ is usable storage.
Where is SANTA BRANCA reservoir located?
SANTA BRANCA is located in São Paulo, Brazil, within the PARAIBA DO SUL basin (coordinates 23.374°S, 45.870°W).
What is SANTA BRANCA used for?
SANTA BRANCA is used primarily for hydroelectric power, and is managed by ONS.