ESTREITO
Tocantins · TOCANTINS
Capacity
5,298.54 hm³
Coordinates
-6.589°N, 47.464°W
Operator
ONS
93.0% full
Current fill
93.0%vs 7 days ago
+3.7%gaining
vs 1 year ago
N/A7-day trend
↑rising
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 5,298.54 hm³ |
| Usable capacity | 2,390.87 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | TOCANTINS |
| Province | Tocantins |
| River basin | TOCANTINS |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -6.589, -47.464 · Open in Google Maps
About ESTREITO
As of September 9, 2026, ESTREITO is filled to 93.0% of its total capacity, holding roughly 2,223 hm³ of water out of a maximum 5,299 hm³. At this level the reservoir is high. Of that total, about 2,391 hm³ is usable (live) storage.
Over the most recent week on record the fill level has risen by 3.7 percentage points.
Across the readings we hold for ESTREITO — 52 data points between September 26, 2025 and September 9, 2026 — the level has ranged from a low of 42.6% (February 6, 2026) to a high of 93.9% (November 14, 2025). On average the reservoir is fullest around November and at its lowest around January.
It is operated by ONS primarily for hydroelectric power. It lies within the TOCANTINS basin at 6.589°S, 47.464°W.
Key facts
- Current fill level
- 93.0%
- Water stored
- 2,223 hm³
- Total capacity
- 5,299 hm³
- Usable capacity
- 2,391 hm³
- 7-day change
- ▲ 3.7 pts
- Primary use
- Hydroelectric power
- River
- TOCANTINS
- River basin
- TOCANTINS
- Operator
- ONS
- Coordinates
- 6.589°S, 47.464°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 93.0% | 2,223 |
| 4 Sep 2026 | 89.2% | 2,134 |
| 28 Aug 2026 | 87.7% | 2,098 |
| 21 Aug 2026 | 88.2% | 2,108 |
| 14 Aug 2026 | 87.3% | 2,088 |
| 7 Aug 2026 | 87.5% | 2,093 |
| 31 Jul 2026 | 87.7% | 2,098 |
| 24 Jul 2026 | 87.7% | 2,098 |
| 17 Jul 2026 | 86.9% | 2,077 |
| 10 Jul 2026 | 85.4% | 2,042 |
| 3 Jul 2026 | 87.5% | 2,093 |
| 26 Jun 2026 | 87.7% | 2,098 |