B. BONITA
São Paulo · TIETE
Capacity
3,135 hm³
Coordinates
-22.519°N, 48.534°W
Operator
ONS
79.5% full
Current fill
79.5%vs 7 days ago
-1.0%losing
vs 1 year ago
N/A7-day trend
→stable
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 3,135 hm³ |
| Usable capacity | 2,566.86 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, -48.534 · Open in Google Maps
About B. BONITA
As of September 9, 2026, B. BONITA is filled to 79.5% of its total capacity, holding roughly 2,040 hm³ of water out of a maximum 3,135 hm³. At this level the reservoir is within its normal operating range. Of that total, about 2,567 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (-1.0 pts).
Across the readings we hold for B. BONITA — 52 data points between September 26, 2025 and September 9, 2026 — the level has ranged from a low of 64.2% (December 31, 2025) to a high of 94.6% (March 20, 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
- 79.5%
- Water stored
- 2,040 hm³
- Total capacity
- 3,135 hm³
- Usable capacity
- 2,567 hm³
- 7-day change
- ▼ 1.0 pts
- Primary use
- Hydroelectric power
- River
- TIETÊ
- River basin
- TIETE
- Operator
- ONS
- Coordinates
- 22.519°S, 48.534°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 79.5% | 2,040 |
| 4 Sep 2026 | 80.5% | 2,065 |
| 28 Aug 2026 | 80.2% | 2,060 |
| 21 Aug 2026 | 82.0% | 2,105 |
| 14 Aug 2026 | 83.2% | 2,136 |
| 7 Aug 2026 | 83.8% | 2,150 |
| 31 Jul 2026 | 85.8% | 2,202 |
| 24 Jul 2026 | 85.9% | 2,204 |
| 17 Jul 2026 | 87.1% | 2,236 |
| 10 Jul 2026 | 87.9% | 2,257 |
| 3 Jul 2026 | 88.6% | 2,274 |
| 26 Jun 2026 | 91.6% | 2,351 |