SAO SALVADOR
Tocantins · TOCANTINS
Capacity
952 hm³
Coordinates
-12.835°N, 48.225°W
Operator
ONS
37.3% full
Current fill
37.3%vs 7 days ago
+4.0%gaining
vs 1 year ago
-6.0%year-over-year
7-day trend
↑rising
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 |
| River | TOCANTINS |
| Province | Tocantins |
| River basin | TOCANTINS |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -12.835, -48.225 · Open in Google Maps
About SAO SALVADOR
As of July 28, 2026, SAO SALVADOR is filled to 37.3% of its total capacity, holding roughly 22 hm³ of water out of a maximum 952 hm³. At this level the reservoir is low. Of that total, about 59 hm³ is usable (live) storage.
Over the most recent week on record the fill level has risen by 4.0 percentage points, and it is 6.0 points below its level on the same date a year earlier.
Across the readings we hold for SAO SALVADOR — 52 data points between August 15, 2025 and July 28, 2026 — the level has ranged from a low of 23.4% (April 24, 2026) to a high of 87.7% (February 20, 2026). On average the reservoir is fullest around September and at its lowest around July.
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
- 37.3%
- Water stored
- 22 hm³
- Total capacity
- 952 hm³
- Usable capacity
- 59 hm³
- 7-day change
- ▲ 4.0 pts
- Year-on-year
- ▼ 6.0 pts
- Primary use
- Hydroelectric power
- River
- TOCANTINS
- River basin
- TOCANTINS
- Operator
- ONS
- Coordinates
- 12.835°S, 48.225°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 37.3% | 22 |
| 24 Jul 2026 | 33.3% | 20 |
| 17 Jul 2026 | 51.2% | 30 |
| 10 Jul 2026 | 53.2% | 32 |
| 3 Jul 2026 | 33.3% | 20 |
| 26 Jun 2026 | 61.3% | 36 |
| 19 Jun 2026 | 55.2% | 33 |
| 12 Jun 2026 | 47.2% | 28 |
| 5 Jun 2026 | 47.2% | 28 |
| 29 May 2026 | 81.5% | 48 |
| 22 May 2026 | 55.2% | 33 |
| 15 May 2026 | 63.3% | 37 |
Frequently asked questions
What is the current water level of SAO SALVADOR?
As of July 28, 2026, SAO SALVADOR is at 37.3% of its capacity, holding approximately 22 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is SAO SALVADOR reservoir full?
No. As of July 28, 2026, SAO SALVADOR is low at 37.3% of its capacity, so it is not full.
Is the water level at SAO SALVADOR rising or falling?
The level at SAO SALVADOR is rising — it gained 4.0 percentage points over the latest week on record.
How much water can SAO SALVADOR hold?
SAO SALVADOR has a total capacity of 952 hm³, of which about 59 hm³ is usable storage.
Where is SAO SALVADOR reservoir located?
SAO SALVADOR is located in Tocantins, Brazil, within the TOCANTINS basin (coordinates 12.835°S, 48.225°W).
What is SAO SALVADOR used for?
SAO SALVADOR is used primarily for hydroelectric power, and is managed by ONS.