S.DO FACÃO
Goiás · PARANAIBA
Capacity
5,199 hm³
Coordinates
-18.046°N, 47.676°W
Operator
ONS
50.5% full
Current fill
50.5%vs 7 days ago
-1.1%losing
vs 1 year ago
N/A7-day trend
→stable
Drought context
Storage vs October average
130%of normal
50.5% full on 2026-10-12, against an average of 38.9% for October across 2 years of readings (+11.6 points).
Rain over the last three months · 21 September 2026
Near normal
In the three months to 21 September 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 +0.74). 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 | 3,474.2 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 October 12, 2026, S.DO FACÃO is filled to 50.5% of its total capacity, holding roughly 1,754 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 (-1.1 pts).
Across the readings we hold for S.DO FACÃO — 52 data points between October 31, 2025 and October 12, 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
- 50.5%
- Water stored
- 1,754 hm³
- Total capacity
- 5,199 hm³
- Usable capacity
- 3,474 hm³
- 7-day change
- ▼ 1.1 pts
- Primary use
- Hydroelectric power
- River
- SAO MARCOS
- River basin
- PARANAIBA
- Operator
- ONS
- Coordinates
- 18.046°S, 47.676°W
- Last updated
- October 12, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 12 Oct 2026 | 50.5% | 1,754 |
| 9 Oct 2026 | 51.2% | 1,777 |
| 2 Oct 2026 | 51.6% | 1,793 |
| 25 Sep 2026 | 52.7% | 1,831 |
| 18 Sep 2026 | 52.9% | 1,838 |
| 11 Sep 2026 | 53.0% | 1,843 |
| 4 Sep 2026 | 53.2% | 1,849 |
| 28 Aug 2026 | 53.5% | 1,860 |
| 21 Aug 2026 | 54.2% | 1,884 |
| 14 Aug 2026 | 55.0% | 1,911 |
| 7 Aug 2026 | 55.5% | 1,930 |
| 31 Jul 2026 | 56.0% | 1,946 |