A. VERMELHA
São Paulo · GRANDE
Capacity
11,025 hm³
Coordinates
-19.868°N, 50.343°W
Operator
ONS
34.4% full
Current fill
34.4%vs 7 days ago
-2.2%losing
vs 1 year ago
N/A7-day trend
↓falling
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 11,025 hm³ |
| Usable capacity | 5,169.22 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | GRANDE |
| Province | São Paulo |
| River basin | GRANDE |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -19.868, -50.343 · Open in Google Maps
About A. VERMELHA
As of September 9, 2026, A. VERMELHA is filled to 34.4% of its total capacity, holding roughly 1,780 hm³ of water out of a maximum 11,025 hm³. At this level the reservoir is low. Of that total, about 5,169 hm³ is usable (live) storage.
Over the most recent week on record the fill level has fallen by 2.2 percentage points.
Across the readings we hold for A. VERMELHA — 52 data points between September 26, 2025 and September 9, 2026 — the level has ranged from a low of 18.3% (December 5, 2025) to a high of 77.9% (May 1, 2026). On average the reservoir is fullest around April and at its lowest around November.
It is operated by ONS primarily for hydroelectric power. It lies within the GRANDE basin at 19.868°S, 50.343°W.
Key facts
- Current fill level
- 34.4%
- Water stored
- 1,780 hm³
- Total capacity
- 11,025 hm³
- Usable capacity
- 5,169 hm³
- 7-day change
- ▼ 2.2 pts
- Primary use
- Hydroelectric power
- River
- GRANDE
- River basin
- GRANDE
- Operator
- ONS
- Coordinates
- 19.868°S, 50.343°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 34.4% | 1,780 |
| 4 Sep 2026 | 36.6% | 1,894 |
| 28 Aug 2026 | 39.6% | 2,049 |
| 21 Aug 2026 | 44.0% | 2,275 |
| 14 Aug 2026 | 46.4% | 2,400 |
| 7 Aug 2026 | 49.2% | 2,543 |
| 31 Jul 2026 | 51.2% | 2,645 |
| 24 Jul 2026 | 53.8% | 2,781 |
| 17 Jul 2026 | 58.3% | 3,012 |
| 10 Jul 2026 | 60.1% | 3,107 |
| 3 Jul 2026 | 62.0% | 3,203 |
| 26 Jun 2026 | 63.5% | 3,283 |