BARIRI
São Paulo · TIETE
Useful capacity
59.93 hm³
Coordinates
22.154°S, 48.754°W
Operator
ONS
58.0% of useful capacity
Current fill
58.0%of useful capacity
vs 7 days ago
-23.4 pplosing
vs 1 year ago
-13.2 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
78%of normal
58.0% full on 2026-10-26, against an average of 74.7% for October across 2 years of readings (-16.7 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around BARIRI had rain close to 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 +0.99). Rain, not storage. Brazil drought figures →
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°S, 48.754°W · Open in Google Maps
About BARIRI
As of October 26, 2026, BARIRI is at 58.0% of useful capacity, holding 34.7 hm³ of 59.93 hm³. Of the 544 hm³ total capacity, that is 6.4%. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 23.4 percentage points, and it is 13.2 points below its level on the same date a year earlier.
Across the readings we hold for BARIRI — 65 data points between October 26, 2025 and October 26, 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 August 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
- 58.0% of useful capacity
- Water stored
- 34.7 hm³
- Total capacity
- 544 hm³
- Usable capacity
- 59.93 hm³
- 7-day change
- ▼ 23.4 pp
- Year-on-year
- ▼ 13.2 pp
- Primary use
- Hydroelectric power
- River
- TIETÊ
- River basin
- TIETE
- Operator
- ONS
- Coordinates
- 22.154°S, 48.754°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 58.0% | 34.7 |
| 25 Oct 2026 | 67.0% | 40.2 |
| 24 Oct 2026 | 87.5% | 52.5 |
| 23 Oct 2026 | 73.2% | 43.8 |
| 22 Oct 2026 | 84.4% | 50.6 |
| 21 Oct 2026 | 81.3% | 48.7 |
| 20 Oct 2026 | 74.2% | 44.5 |
| 19 Oct 2026 | 81.3% | 48.7 |
| 18 Oct 2026 | 91.7% | 54.9 |
| 17 Oct 2026 | 91.7% | 54.9 |
| 16 Oct 2026 | 84.4% | 50.6 |
| 15 Oct 2026 | 74.2% | 44.5 |