PARAIBUNA
São Paulo · PARAIBA DO SUL
Useful capacity
2,631.17 hm³
Coordinates
23.410°S, 45.601°W
Operator
ONS
44.2% of useful capacity
Current fill
44.2%of useful capacity
vs 7 days ago
+1.9 ppgaining
vs 1 year ago
-5.8 ppyear-over-year
7-day trend
↑rising
Drought context
Storage vs October average
96%of normal
44.2% full on 2026-10-27, against an average of 45.9% for October across 2 years of readings (-1.7 points).
Rain over the last three months · 11 October 2026
Extremely wet
In the three months to 11 October 2026 the area around PARAIBUNA had exceptionally wet conditions, a surplus 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 +2.40). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 4,712 hm³ |
| Usable capacity | 2,631 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | PARAÍBA SUL |
| Province | São Paulo |
| River basin | PARAIBA DO SUL |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 23.410°S, 45.601°W · Open in Google Maps
About PARAIBUNA
As of October 27, 2026, PARAIBUNA is at 44.2% of useful capacity, holding 1,163 hm³ of 2,631 hm³. Of the 4,712 hm³ total capacity, that is 24.7%. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has risen by 1.9 percentage points, and it is 5.8 points below its level on the same date a year earlier.
Across the readings we hold for PARAIBUNA — 65 data points between October 27, 2025 and October 27, 2026 — the level has ranged from a low of 33.5% (January 16, 2026) to a high of 58.4% (May 22, 2026). On average the reservoir is fullest around May and at its lowest around January.
It is operated by ONS primarily for hydroelectric power. It lies within the PARAIBA DO SUL basin at 23.410°S, 45.601°W.
Key facts
- Current fill level
- 44.2% of useful capacity
- Water stored
- 1,163 hm³
- Total capacity
- 4,712 hm³
- Usable capacity
- 2,631 hm³
- 7-day change
- ▲ 1.9 pp
- Year-on-year
- ▼ 5.8 pp
- Primary use
- Hydroelectric power
- River
- PARAÍBA SUL
- River basin
- PARAIBA DO SUL
- Operator
- ONS
- Coordinates
- 23.410°S, 45.601°W
- Last updated
- October 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Oct 2026 | 44.2% | 1,163 |
| 26 Oct 2026 | 43.8% | 1,154 |
| 25 Oct 2026 | 43.4% | 1,141 |
| 24 Oct 2026 | 42.7% | 1,123 |
| 23 Oct 2026 | 42.5% | 1,120 |
| 22 Oct 2026 | 42.5% | 1,117 |
| 21 Oct 2026 | 42.4% | 1,116 |
| 20 Oct 2026 | 42.3% | 1,113 |
| 19 Oct 2026 | 42.1% | 1,109 |
| 18 Oct 2026 | 41.9% | 1,102 |
| 17 Oct 2026 | 41.5% | 1,093 |
| 16 Oct 2026 | 41.2% | 1,084 |