SAO SALVADOR
Tocantins · TOCANTINS
Useful capacity
59.14 hm³
Coordinates
12.835°S, 48.225°W
Operator
ONS
57.3% of useful capacity
Current fill
57.3%of useful capacity
vs 7 days ago
+25.9 ppgaining
vs 1 year ago
+12.0 ppyear-over-year
7-day trend
↑rising
Drought context
Storage vs October average
103%of normal
57.3% full on 2026-10-26, against an average of 55.9% for October across 2 years of readings (+1.4 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around SAO SALVADOR 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 +0.04). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 952 hm³ |
| Usable capacity | 59.14 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| Province | Tocantins |
| River basin | TOCANTINS |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 12.835°S, 48.225°W · Open in Google Maps
About SAO SALVADOR
As of October 26, 2026, SAO SALVADOR is at 57.3% of useful capacity, holding 33.9 hm³ of 59.14 hm³. Of the 952 hm³ total capacity, that is 3.6%. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has risen by 25.9 percentage points, and it is 12.0 points above its level on the same date a year earlier.
Across the readings we hold for SAO SALVADOR — 65 data points between October 26, 2025 and October 26, 2026 — the level has ranged from a low of 13.6% (August 28, 2026) to a high of 91.8% (October 2, 2026). On average the reservoir is fullest around September and at its lowest around August.
It is operated by ONS primarily for hydroelectric power. It lies within the TOCANTINS basin at 12.835°S, 48.225°W.
Key facts
- Current fill level
- 57.3% of useful capacity
- Water stored
- 33.9 hm³
- Total capacity
- 952 hm³
- Usable capacity
- 59.14 hm³
- 7-day change
- ▲ 25.9 pp
- Year-on-year
- ▲ 12.0 pp
- Primary use
- Hydroelectric power
- River basin
- TOCANTINS
- Operator
- ONS
- Coordinates
- 12.835°S, 48.225°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 57.3% | 33.9 |
| 25 Oct 2026 | 57.3% | 33.9 |
| 24 Oct 2026 | 67.3% | 39.8 |
| 23 Oct 2026 | 79.5% | 47 |
| 22 Oct 2026 | 79.5% | 47 |
| 21 Oct 2026 | 85.6% | 50.6 |
| 20 Oct 2026 | 79.5% | 47 |
| 19 Oct 2026 | 31.3% | 18.5 |
| 18 Oct 2026 | 59.3% | 35 |
| 17 Oct 2026 | 71.4% | 42.2 |
| 16 Oct 2026 | 85.6% | 50.6 |
| 15 Oct 2026 | 73.4% | 43.4 |