BARIRI
São Paulo · TIETE
Capacity
544 hm³
Coordinates
-22.154°N, 48.754°W
Operator
ONS
Current fill
67.1%vs 7 days ago
-19.5%losing
vs 1 year ago
-10.2%year-over-year
7-day trend
↓falling
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 544 hm³ |
| Usable capacity | 59.93 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. -22.154, -48.754 · Open in Google Maps
About BARIRI
As of June 10, 2026, BARIRI is filled to 67.1% of its total capacity, holding roughly 40 hm³ of water out of a maximum 544 hm³. At this level the reservoir is within its normal operating range. Of that total, about 60 hm³ is usable (live) storage.
Over the most recent week on record the fill level has fallen by 19.5 percentage points, and it is 10.2 points below its level on the same date a year earlier.
Across the readings we hold for BARIRI — 52 data points between June 27, 2025 and June 10, 2026 — the level has ranged from a low of 40.0% (November 21, 2025) to a high of 93.8% (May 1, 2026). On average the reservoir is fullest around July and at its lowest around November.
It is operated by ONS primarily for hydroelectric power. It lies within the TIETE basin at 22.154°S, 48.754°W.
Key facts
- Current fill level
- 67.1%
- Water stored
- 40 hm³
- Total capacity
- 544 hm³
- Usable capacity
- 60 hm³
- 7-day change
- ▼ 19.5 pts
- Year-on-year
- ▼ 10.2 pts
- Primary use
- Hydroelectric power
- River
- TIETÊ
- River basin
- TIETE
- Operator
- ONS
- Coordinates
- 22.154°S, 48.754°W
- Last updated
- June 10, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 10 Jun 2026 | 67.0% | 40 |
| 5 Jun 2026 | 86.5% | 52 |
| 29 May 2026 | 89.6% | 54 |
| 22 May 2026 | 50.0% | 30 |
| 15 May 2026 | 48.0% | 29 |
| 8 May 2026 | 66.0% | 40 |
| 1 May 2026 | 93.8% | 56 |
| 24 Apr 2026 | 81.3% | 49 |
| 17 Apr 2026 | 79.3% | 48 |
| 10 Apr 2026 | 69.1% | 41 |
| 3 Apr 2026 | 68.1% | 41 |
| 27 Mar 2026 | 70.1% | 42 |
Frequently asked questions
What is the current water level of BARIRI?
As of June 10, 2026, BARIRI is at 67.1% of its capacity, holding approximately 40 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is BARIRI reservoir full?
No. As of June 10, 2026, BARIRI is within its normal operating range at 67.1% of its capacity, so it is not full.
Is the water level at BARIRI rising or falling?
The level at BARIRI is falling — it dropped 19.5 percentage points over the latest week on record.
How much water can BARIRI hold?
BARIRI has a total capacity of 544 hm³, of which about 60 hm³ is usable storage.
Where is BARIRI reservoir located?
BARIRI is located in São Paulo, Brazil, within the TIETE basin (coordinates 22.154°S, 48.754°W).
What is BARIRI used for?
BARIRI is used primarily for hydroelectric power, and is managed by ONS.