S.DO FACÃO
Goiás · PARANAIBA
Useful capacity
3,474.2 hm³
Coordinates
18.046°S, 47.676°W
Operator
ONS
48.4% of useful capacity
Current fill
48.4%of useful capacity
vs 7 days ago
-1.0 pplosing
vs 1 year ago
-4.2 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
95%of normal
48.4% full on 2026-10-26, against an average of 51.2% for October across 2 years of readings (-2.8 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around S.DO FACÃO 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 +0.96). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 5,199 hm³ |
| Usable capacity | 3,474 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°S, 47.676°W · Open in Google Maps
About S.DO FACÃO
As of October 26, 2026, S.DO FACÃO is at 48.4% of useful capacity, holding 1,681 hm³ of 3,474 hm³. Of the 5,199 hm³ total capacity, that is 32.3%. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 1.0 percentage points, and it is 4.2 points below its level on the same date a year earlier.
Across the readings we hold for S.DO FACÃO — 65 data points between October 26, 2025 and October 26, 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
- 48.4% of useful capacity
- Water stored
- 1,681 hm³
- Total capacity
- 5,199 hm³
- Usable capacity
- 3,474 hm³
- 7-day change
- ▼ 1.0 pp
- Year-on-year
- ▼ 4.2 pp
- Primary use
- Hydroelectric power
- River
- SAO MARCOS
- River basin
- PARANAIBA
- Operator
- ONS
- Coordinates
- 18.046°S, 47.676°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 48.4% | 1,681 |
| 25 Oct 2026 | 48.6% | 1,688 |
| 24 Oct 2026 | 49.0% | 1,701 |
| 23 Oct 2026 | 49.1% | 1,705 |
| 22 Oct 2026 | 49.2% | 1,708 |
| 21 Oct 2026 | 49.3% | 1,711 |
| 20 Oct 2026 | 49.4% | 1,715 |
| 19 Oct 2026 | 49.4% | 1,716 |
| 18 Oct 2026 | 49.7% | 1,725 |
| 17 Oct 2026 | 49.9% | 1,733 |
| 16 Oct 2026 | 50.0% | 1,738 |
| 15 Oct 2026 | 50.3% | 1,746 |