PEDRA DO CAVALO
Bahia · PARAGUACU
Useful capacity
942 hm³
Coordinates
12.582°S, 39.002°W
Operator
ONS
78.2% of useful capacity
Current fill
78.2%of useful capacity
vs 7 days ago
-2.1 pplosing
vs 1 year ago
+10.8 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
105%of normal
78.2% full on 2026-10-26, against an average of 74.6% for October across 2 years of readings (+3.6 points).
Rain over the last three months · 11 October 2026
Extremely dry
In the three months to 11 October 2026 the area around PEDRA DO CAVALO had extremely little rain for the season, a shortfall seen about one year in forty. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −3.24). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 3,134 hm³ |
| Usable capacity | 942 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| Province | Bahia |
| River basin | PARAGUACU |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 12.582°S, 39.002°W · Open in Google Maps
About PEDRA DO CAVALO
As of October 26, 2026, PEDRA DO CAVALO is at 78.2% of useful capacity, holding 736.7 hm³ of 942 hm³. Of the 3,134 hm³ total capacity, that is 23.5%. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 2.1 percentage points, and it is 10.8 points above its level on the same date a year earlier.
Across the readings we hold for PEDRA DO CAVALO — 65 data points between June 6, 2025 and October 26, 2026 — the level has ranged from a low of 63.5% (November 21, 2025) to a high of 102.7% (August 21, 2026). On average the reservoir is fullest around March and at its lowest around November.
It is operated by ONS primarily for hydroelectric power. It lies within the PARAGUACU basin at 12.582°S, 39.002°W.
Key facts
- Current fill level
- 78.2% of useful capacity
- Water stored
- 736.7 hm³
- Total capacity
- 3,134 hm³
- Usable capacity
- 942 hm³
- 7-day change
- ▼ 2.1 pp
- Year-on-year
- ▲ 10.8 pp
- Primary use
- Hydroelectric power
- River basin
- PARAGUACU
- Operator
- ONS
- Coordinates
- 12.582°S, 39.002°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 78.2% | 736.7 |
| 25 Oct 2026 | 78.6% | 740.3 |
| 24 Oct 2026 | 78.8% | 742.8 |
| 23 Oct 2026 | 79.1% | 745.1 |
| 22 Oct 2026 | 79.4% | 747.6 |
| 21 Oct 2026 | 79.6% | 750 |
| 20 Oct 2026 | 79.9% | 752.4 |
| 19 Oct 2026 | 80.3% | 756 |
| 18 Oct 2026 | 80.5% | 758.4 |
| 17 Oct 2026 | 80.8% | 760.9 |
| 16 Oct 2026 | 81.0% | 763.3 |
| 15 Oct 2026 | 81.3% | 765.8 |