SEGREDO
Paraná · IGUACU
Capacity
2,950 hm³
Coordinates
-25.792°N, 52.116°W
Operator
ONS
87.0% full
Current fill
87.0%vs 7 days ago
-6.2%losing
vs 1 year ago
+31.0%year-over-year
7-day trend
↓falling
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 2,950 hm³ |
| Usable capacity | 383.68 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | IGUAÇU |
| Province | Paraná |
| River basin | IGUACU |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -25.792, -52.116 · Open in Google Maps
About SEGREDO
As of July 28, 2026, SEGREDO is filled to 87.0% of its total capacity, holding roughly 334 hm³ of water out of a maximum 2,950 hm³. At this level the reservoir is high. Of that total, about 384 hm³ is usable (live) storage.
Over the most recent week on record the fill level has fallen by 6.2 percentage points, and it is 31.0 points above its level on the same date a year earlier.
Across the readings we hold for SEGREDO — 52 data points between August 15, 2025 and July 28, 2026 — the level has ranged from a low of 13.2% (March 20, 2026) to a high of 99.0% (October 17, 2025). On average the reservoir is fullest around July and at its lowest around April.
It is operated by ONS primarily for hydroelectric power. It lies within the IGUACU basin at 25.792°S, 52.116°W.
Key facts
- Current fill level
- 87.0%
- Water stored
- 334 hm³
- Total capacity
- 2,950 hm³
- Usable capacity
- 384 hm³
- 7-day change
- ▼ 6.2 pts
- Year-on-year
- ▲ 31.0 pts
- Primary use
- Hydroelectric power
- River
- IGUAÇU
- River basin
- IGUACU
- Operator
- ONS
- Coordinates
- 25.792°S, 52.116°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 87.0% | 334 |
| 24 Jul 2026 | 93.2% | 358 |
| 17 Jul 2026 | 97.5% | 374 |
| 10 Jul 2026 | 95.7% | 367 |
| 3 Jul 2026 | 97.9% | 376 |
| 26 Jun 2026 | 85.1% | 327 |
| 19 Jun 2026 | 75.1% | 288 |
| 12 Jun 2026 | 89.1% | 342 |
| 5 Jun 2026 | 76.9% | 295 |
| 29 May 2026 | 88.7% | 340 |
| 22 May 2026 | 74.7% | 287 |
| 15 May 2026 | 61.3% | 235 |
Frequently asked questions
What is the current water level of SEGREDO?
As of July 28, 2026, SEGREDO is at 87.0% of its capacity, holding approximately 334 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is SEGREDO reservoir full?
No. As of July 28, 2026, SEGREDO is high at 87.0% of its capacity, so it is not full.
Is the water level at SEGREDO rising or falling?
The level at SEGREDO is falling — it dropped 6.2 percentage points over the latest week on record.
How much water can SEGREDO hold?
SEGREDO has a total capacity of 2,950 hm³, of which about 384 hm³ is usable storage.
Where is SEGREDO reservoir located?
SEGREDO is located in Paraná, Brazil, within the IGUACU basin (coordinates 25.792°S, 52.116°W).
What is SEGREDO used for?
SEGREDO is used primarily for hydroelectric power, and is managed by ONS.