BATALHA
Goiás · PARANAIBA
Useful capacity
1,351.53 hm³
Coordinates
17.346°S, 47.489°W
Operator
ONS
46.9% of useful capacity
Current fill
46.9%of useful capacity
vs 7 days ago
-3.2 pplosing
vs 1 year ago
-4.2 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
92%of normal
46.9% full on 2026-10-26, against an average of 50.8% for October across 2 years of readings (-3.9 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around BATALHA 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 +0.29). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 1,782 hm³ |
| Usable capacity | 1,352 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. 17.346°S, 47.489°W · Open in Google Maps
About BATALHA
As of October 26, 2026, BATALHA is at 46.9% of useful capacity, holding 633.7 hm³ of 1,352 hm³. Of the 1,782 hm³ total capacity, that is 35.6%. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 3.2 percentage points, and it is 4.2 points below its level on the same date a year earlier.
Across the readings we hold for BATALHA — 65 data points between October 26, 2025 and October 26, 2026 — the level has ranged from a low of 36.5% (December 12, 2025) to a high of 97.1% (May 1, 2026). On average the reservoir is fullest around May and at its lowest around December.
It is operated by ONS primarily for hydroelectric power. It lies within the PARANAIBA basin at 17.346°S, 47.489°W.
Key facts
- Current fill level
- 46.9% of useful capacity
- Water stored
- 633.7 hm³
- Total capacity
- 1,782 hm³
- Usable capacity
- 1,352 hm³
- 7-day change
- ▼ 3.2 pp
- Year-on-year
- ▼ 4.2 pp
- Primary use
- Hydroelectric power
- River
- SAO MARCOS
- River basin
- PARANAIBA
- Operator
- ONS
- Coordinates
- 17.346°S, 47.489°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 46.9% | 633.7 |
| 25 Oct 2026 | 47.5% | 641.6 |
| 24 Oct 2026 | 47.9% | 647 |
| 23 Oct 2026 | 48.1% | 650.5 |
| 22 Oct 2026 | 48.6% | 657.5 |
| 21 Oct 2026 | 49.1% | 663.7 |
| 20 Oct 2026 | 49.5% | 668.5 |
| 19 Oct 2026 | 50.1% | 676.8 |
| 18 Oct 2026 | 50.5% | 681.8 |
| 17 Oct 2026 | 50.7% | 685.8 |
| 16 Oct 2026 | 51.0% | 689.3 |
| 15 Oct 2026 | 51.6% | 697.1 |