ESTREITO
Tocantins · TOCANTINS
Capacity
5,298.54 hm³
Coordinates
-6.589°N, 47.464°W
Operator
ONS
Current fill
88.4%vs 7 days ago
-1.7%losing
vs 1 year ago
+3.2%year-over-year
7-day trend
↓falling
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 June 10, 2026, ESTREITO is filled to 88.4% of its total capacity, holding roughly 2,113 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 fallen by 1.7 percentage points, and it is 3.2 points above its level on the same date a year earlier.
Across the readings we hold for ESTREITO — 52 data points between June 27, 2025 and June 10, 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
- 88.4%
- Water stored
- 2,113 hm³
- Total capacity
- 5,299 hm³
- Usable capacity
- 2,391 hm³
- 7-day change
- ▼ 1.7 pts
- Year-on-year
- ▲ 3.2 pts
- Primary use
- Hydroelectric power
- River
- TOCANTINS
- River basin
- TOCANTINS
- Operator
- ONS
- Coordinates
- 6.589°S, 47.464°W
- Last updated
- June 10, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 10 Jun 2026 | 88.4% | 2,113 |
| 5 Jun 2026 | 90.1% | 2,154 |
| 29 May 2026 | 91.0% | 2,175 |
| 22 May 2026 | 91.2% | 2,181 |
| 15 May 2026 | 89.7% | 2,144 |
| 8 May 2026 | 91.9% | 2,196 |
| 1 May 2026 | 86.0% | 2,057 |
| 24 Apr 2026 | 83.7% | 2,002 |
| 17 Apr 2026 | 81.1% | 1,938 |
| 10 Apr 2026 | 65.6% | 1,568 |
| 3 Apr 2026 | 57.3% | 1,371 |
| 27 Mar 2026 | 65.4% | 1,563 |
Frequently asked questions
What is the current water level of ESTREITO?
As of June 10, 2026, ESTREITO is at 88.4% of its capacity, holding approximately 2,113 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is ESTREITO reservoir full?
No. As of June 10, 2026, ESTREITO is high at 88.4% of its capacity, so it is not full.
Is the water level at ESTREITO rising or falling?
The level at ESTREITO is falling — it dropped 1.7 percentage points over the latest week on record.
How much water can ESTREITO hold?
ESTREITO has a total capacity of 5,299 hm³, of which about 2,391 hm³ is usable storage.
Where is ESTREITO reservoir located?
ESTREITO is located in Tocantins, Brazil, within the TOCANTINS basin (coordinates 6.589°S, 47.464°W).
What is ESTREITO used for?
ESTREITO is used primarily for hydroelectric power, and is managed by ONS.