B. BONITA
São Paulo · TIETE
Useful capacity
2,476.44 hm³
Coordinates
22.519°S, 48.534°W
Operator
ONS
95.1% of useful capacity
Current fill
95.1%of useful capacity
vs 7 days ago
+6.0 ppgaining
vs 1 year ago
+21.0 ppyear-over-year
7-day trend
↑rising
Drought context
Storage vs October average
116%of normal
95.1% full on 2026-10-27, against an average of 82.0% for October across 2 years of readings (+13.1 points).
Rain over the last three months · 11 October 2026
Moderately wet
In the three months to 11 October 2026 the area around B. BONITA had more rain than 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 +1.37). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 2,965 hm³ |
| Usable capacity | 2,476 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | TIETÊ |
| Province | São Paulo |
| River basin | TIETE |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 22.519°S, 48.534°W · Open in Google Maps
About B. BONITA
As of October 27, 2026, B. BONITA is at 95.1% of useful capacity, holding 2,355 hm³ of 2,476 hm³. Of the 2,965 hm³ total capacity, that is 79.4%. At this level the reservoir is high.
Over the most recent week on record the fill level has risen by 6.0 percentage points, and it is 21.0 points above its level on the same date a year earlier.
Across the readings we hold for B. BONITA — 65 data points between October 27, 2025 and October 27, 2026 — the level has ranged from a low of 63.8% (December 31, 2025) to a high of 95.1% (October 27, 2026). On average the reservoir is fullest around March and at its lowest around January.
It is operated by ONS primarily for hydroelectric power. It lies within the TIETE basin at 22.519°S, 48.534°W.
Key facts
- Current fill level
- 95.1% of useful capacity
- Water stored
- 2,355 hm³
- Total capacity
- 2,965 hm³
- Usable capacity
- 2,476 hm³
- 7-day change
- ▲ 6.0 pp
- Year-on-year
- ▲ 21.0 pp
- Primary use
- Hydroelectric power
- River
- TIETÊ
- River basin
- TIETE
- Operator
- ONS
- Coordinates
- 22.519°S, 48.534°W
- Last updated
- October 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Oct 2026 | 95.1% | 2,355 |
| 26 Oct 2026 | 94.4% | 2,337 |
| 25 Oct 2026 | 92.1% | 2,281 |
| 24 Oct 2026 | 88.8% | 2,199 |
| 23 Oct 2026 | 87.4% | 2,165 |
| 22 Oct 2026 | 87.3% | 2,162 |
| 21 Oct 2026 | 88.1% | 2,182 |
| 20 Oct 2026 | 89.0% | 2,205 |
| 19 Oct 2026 | 89.5% | 2,217 |
| 18 Oct 2026 | 89.5% | 2,217 |
| 17 Oct 2026 | 89.2% | 2,208 |
| 16 Oct 2026 | 89.2% | 2,208 |