S.DO FACÃO
Goiás · PARANAIBA
Capacity
5,199 hm³
Coordinates
-18.046°N, 47.676°W
Operator
ONS
56.1% full
Current fill
56.1%vs 7 days ago
-0.1%losing
vs 1 year ago
-4.9%year-over-year
7-day trend
→stable
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 5,199 hm³ |
| Usable capacity | 3,474.2 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | SAO MARCOS |
| Province | Goiás |
| River basin | PARANAIBA |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -18.046, -47.676 · Open in Google Maps
About S.DO FACÃO
As of July 28, 2026, S.DO FACÃO is filled to 56.1% of its total capacity, holding roughly 1,948 hm³ of water out of a maximum 5,199 hm³. At this level the reservoir is within its normal operating range. Of that total, about 3,474 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (-0.1 pts), and it is 4.9 points below its level on the same date a year earlier.
Across the readings we hold for S.DO FACÃO — 52 data points between August 15, 2025 and July 28, 2026 — the level has ranged from a low of 47.4% (January 16, 2026) to a high of 61.8% (April 17, 2026). On average the reservoir is fullest around April and at its lowest around January.
It is operated by ONS primarily for hydroelectric power. It lies within the PARANAIBA basin at 18.046°S, 47.676°W.
Key facts
- Current fill level
- 56.1%
- Water stored
- 1,948 hm³
- Total capacity
- 5,199 hm³
- Usable capacity
- 3,474 hm³
- 7-day change
- ▼ 0.1 pts
- Year-on-year
- ▼ 4.9 pts
- Primary use
- Hydroelectric power
- River
- SAO MARCOS
- River basin
- PARANAIBA
- Operator
- ONS
- Coordinates
- 18.046°S, 47.676°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 56.1% | 1,948 |
| 24 Jul 2026 | 56.2% | 1,952 |
| 17 Jul 2026 | 56.4% | 1,958 |
| 10 Jul 2026 | 56.5% | 1,961 |
| 3 Jul 2026 | 56.5% | 1,963 |
| 26 Jun 2026 | 56.5% | 1,964 |
| 19 Jun 2026 | 56.9% | 1,978 |
| 12 Jun 2026 | 57.8% | 2,009 |
| 5 Jun 2026 | 58.3% | 2,026 |
| 29 May 2026 | 58.8% | 2,044 |
| 22 May 2026 | 58.9% | 2,046 |
| 15 May 2026 | 58.8% | 2,044 |
Frequently asked questions
What is the current water level of S.DO FACÃO?
As of July 28, 2026, S.DO FACÃO is at 56.1% of its capacity, holding approximately 1,948 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is S.DO FACÃO reservoir full?
No. As of July 28, 2026, S.DO FACÃO is within its normal operating range at 56.1% of its capacity, so it is not full.
Is the water level at S.DO FACÃO rising or falling?
The level at S.DO FACÃO has been broadly stable over the latest week on record (-0.1 points).
How much water can S.DO FACÃO hold?
S.DO FACÃO has a total capacity of 5,199 hm³, of which about 3,474 hm³ is usable storage.
Where is S.DO FACÃO reservoir located?
S.DO FACÃO is located in Goiás, Brazil, within the PARANAIBA basin (coordinates 18.046°S, 47.676°W).
What is S.DO FACÃO used for?
S.DO FACÃO is used primarily for hydroelectric power, and is managed by ONS.