BARIRI
São Paulo · TIETE
Capacity
544 hm³
Coordinates
-22.154°N, 48.754°W
Operator
ONS
73.2% full
Current fill
73.2%vs 7 days ago
-26.8%losing
vs 1 year ago
-8.2%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 July 28, 2026, BARIRI is filled to 73.2% of its total capacity, holding roughly 44 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 26.8 percentage points, and it is 8.2 points below its level on the same date a year earlier.
Across the readings we hold for BARIRI — 52 data points between August 15, 2025 and July 28, 2026 — the level has ranged from a low of 40.0% (November 21, 2025) to a high of 100.0% (July 24, 2026). On average the reservoir is fullest around June 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
- 73.2%
- Water stored
- 44 hm³
- Total capacity
- 544 hm³
- Usable capacity
- 60 hm³
- 7-day change
- ▼ 26.8 pts
- Year-on-year
- ▼ 8.2 pts
- Primary use
- Hydroelectric power
- River
- TIETÊ
- River basin
- TIETE
- Operator
- ONS
- Coordinates
- 22.154°S, 48.754°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 73.2% | 44 |
| 24 Jul 2026 | 100.0% | 60 |
| 17 Jul 2026 | 80.3% | 48 |
| 10 Jul 2026 | 77.2% | 46 |
| 3 Jul 2026 | 61.0% | 37 |
| 26 Jun 2026 | 92.7% | 56 |
| 19 Jun 2026 | 77.2% | 46 |
| 12 Jun 2026 | 60.0% | 36 |
| 5 Jun 2026 | 84.4% | 51 |
| 29 May 2026 | 89.6% | 54 |
| 22 May 2026 | 50.0% | 30 |
| 15 May 2026 | 48.0% | 29 |
Frequently asked questions
What is the current water level of BARIRI?
As of July 28, 2026, BARIRI is at 73.2% of its capacity, holding approximately 44 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is BARIRI reservoir full?
No. As of July 28, 2026, BARIRI is within its normal operating range at 73.2% 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 26.8 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.