B. BONITA
São Paulo · TIETE
Capacity
3,135 hm³
Coordinates
-22.519°N, 48.534°W
Operator
ONS
86.0% full
Current fill
86.0%vs 7 days ago
-0.2%losing
vs 1 year ago
-3.0%year-over-year
7-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 July 28, 2026, B. BONITA is filled to 86.0% of its total capacity, holding roughly 2,207 hm³ of water out of a maximum 3,135 hm³. At this level the reservoir is high. 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 (-0.2 pts), and it is 3.0 points below its level on the same date a year earlier.
Across the readings we hold for B. BONITA — 52 data points between August 15, 2025 and July 28, 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
- 86.0%
- Water stored
- 2,207 hm³
- Total capacity
- 3,135 hm³
- Usable capacity
- 2,567 hm³
- 7-day change
- ▼ 0.2 pts
- Year-on-year
- ▼ 3.0 pts
- Primary use
- Hydroelectric power
- River
- TIETÊ
- River basin
- TIETE
- Operator
- ONS
- Coordinates
- 22.519°S, 48.534°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 86.0% | 2,207 |
| 24 Jul 2026 | 86.2% | 2,213 |
| 17 Jul 2026 | 87.1% | 2,236 |
| 10 Jul 2026 | 87.7% | 2,251 |
| 3 Jul 2026 | 88.6% | 2,274 |
| 26 Jun 2026 | 91.6% | 2,351 |
| 19 Jun 2026 | 89.5% | 2,298 |
| 12 Jun 2026 | 87.0% | 2,233 |
| 5 Jun 2026 | 86.7% | 2,225 |
| 29 May 2026 | 87.1% | 2,236 |
| 22 May 2026 | 85.2% | 2,187 |
| 15 May 2026 | 82.8% | 2,124 |
Frequently asked questions
What is the current water level of B. BONITA?
As of July 28, 2026, B. BONITA is at 86.0% of its capacity, holding approximately 2,207 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is B. BONITA reservoir full?
No. As of July 28, 2026, B. BONITA is high at 86.0% of its capacity, so it is not full.
Is the water level at B. BONITA rising or falling?
The level at B. BONITA has been broadly stable over the latest week on record (-0.2 points).
How much water can B. BONITA hold?
B. BONITA has a total capacity of 3,135 hm³, of which about 2,567 hm³ is usable storage.
Where is B. BONITA reservoir located?
B. BONITA is located in São Paulo, Brazil, within the TIETE basin (coordinates 22.519°S, 48.534°W).
What is B. BONITA used for?
B. BONITA is used primarily for hydroelectric power, and is managed by ONS.