A. VERMELHA
São Paulo · GRANDE
Useful capacity
5,169.22 hm³
Coordinates
19.868°S, 50.343°W
Operator
ONS
28.7% of useful capacity
Current fill
28.7%of useful capacity
vs 7 days ago
-1.1 pplosing
vs 1 year ago
+3.5 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
105%of normal
28.7% full on 2026-10-26, against an average of 27.4% for October across 2 years of readings (+1.3 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around A. VERMELHA had rain close to normal for the season. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −0.08). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 11,025 hm³ |
| Usable capacity | 5,169 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| Province | São Paulo |
| River basin | GRANDE |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 19.868°S, 50.343°W · Open in Google Maps
About A. VERMELHA
As of October 26, 2026, A. VERMELHA is at 28.7% of useful capacity, holding 1,481 hm³ of 5,169 hm³. Of the 11,025 hm³ total capacity, that is 13.4%. At this level the reservoir is low.
Over the most recent week on record the fill level has fallen by 1.1 percentage points, and it is 3.5 points above its level on the same date a year earlier.
Across the readings we hold for A. VERMELHA — 65 data points between October 26, 2025 and October 26, 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
- 28.7% of useful capacity
- Water stored
- 1,481 hm³
- Total capacity
- 11,025 hm³
- Usable capacity
- 5,169 hm³
- 7-day change
- ▼ 1.1 pp
- Year-on-year
- ▲ 3.5 pp
- Primary use
- Hydroelectric power
- River basin
- GRANDE
- Operator
- ONS
- Coordinates
- 19.868°S, 50.343°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 28.6% | 1,481 |
| 25 Oct 2026 | 29.0% | 1,500 |
| 24 Oct 2026 | 29.2% | 1,509 |
| 23 Oct 2026 | 29.1% | 1,505 |
| 22 Oct 2026 | 29.1% | 1,505 |
| 21 Oct 2026 | 29.3% | 1,514 |
| 20 Oct 2026 | 29.7% | 1,533 |
| 19 Oct 2026 | 29.8% | 1,538 |
| 18 Oct 2026 | 29.5% | 1,524 |
| 17 Oct 2026 | 29.6% | 1,529 |
| 16 Oct 2026 | 29.7% | 1,533 |
| 15 Oct 2026 | 30.0% | 1,552 |