SANTA BRANCA
São Paulo · PARAIBA DO SUL
Capacity
439 hm³
Coordinates
-23.374°N, 45.870°W
Operator
ONS
34.7% full
Current fill
34.7%vs 7 days ago
-0.9%losing
vs 1 year ago
N/A7-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 September 9, 2026, SANTA BRANCA is filled to 34.7% of its total capacity, holding roughly 107 hm³ of water out of a maximum 439 hm³. At this level the reservoir is low. Of that total, about 307 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (-0.9 pts).
Across the readings we hold for SANTA BRANCA — 52 data points between September 26, 2025 and September 9, 2026 — the level has ranged from a low of 20.8% (November 21, 2025) to a high of 47.7% (May 1, 2026). On average the reservoir is fullest around February 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
- 34.7%
- Water stored
- 107 hm³
- Total capacity
- 439 hm³
- Usable capacity
- 307 hm³
- 7-day change
- ▼ 0.9 pts
- Primary use
- Hydroelectric power
- River
- PARAÍBA SUL
- River basin
- PARAIBA DO SUL
- Operator
- ONS
- Coordinates
- 23.374°S, 45.870°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 34.7% | 107 |
| 4 Sep 2026 | 35.6% | 109 |
| 28 Aug 2026 | 36.3% | 111 |
| 21 Aug 2026 | 37.8% | 116 |
| 14 Aug 2026 | 38.7% | 119 |
| 7 Aug 2026 | 40.0% | 123 |
| 31 Jul 2026 | 40.3% | 124 |
| 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 |