SEGREDO
Paraná · IGUACU
Useful capacity
383.68 hm³
Coordinates
25.792°S, 52.116°W
Operator
ONS
84.9% of useful capacity
Current fill
84.9%of useful capacity
vs 7 days ago
+10.0 ppgaining
vs 1 year ago
-3.9 ppyear-over-year
7-day trend
↑rising
Drought context
Storage vs October average
99%of normal
84.9% full on 2026-10-26, against an average of 85.5% for October across 2 years of readings (-0.6 points).
Rain over the last three months · 11 October 2026
Very wet
In the three months to 11 October 2026 the area around SEGREDO had much more rain than normal, seen about one year in fifteen. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index +1.94). Rain, not storage. Brazil drought figures →
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°S, 52.116°W · Open in Google Maps
About SEGREDO
As of October 26, 2026, SEGREDO is at 84.9% of useful capacity, holding 325.9 hm³ of 383.68 hm³. Of the 2,950 hm³ total capacity, that is 11.0%. At this level the reservoir is high.
Over the most recent week on record the fill level has risen by 10.0 percentage points, and it is 3.9 points below its level on the same date a year earlier.
Across the readings we hold for SEGREDO — 65 data points between October 26, 2025 and October 26, 2026 — the level has ranged from a low of 13.2% (March 20, 2026) to a high of 97.9% (July 3, 2026). 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
- 84.9% of useful capacity
- Water stored
- 325.9 hm³
- Total capacity
- 2,950 hm³
- Usable capacity
- 383.68 hm³
- 7-day change
- ▲ 10.0 pp
- Year-on-year
- ▼ 3.9 pp
- Primary use
- Hydroelectric power
- River
- IGUAÇU
- River basin
- IGUACU
- Operator
- ONS
- Coordinates
- 25.792°S, 52.116°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 84.9% | 325.9 |
| 25 Oct 2026 | 90.1% | 345.7 |
| 24 Oct 2026 | 85.5% | 328.2 |
| 23 Oct 2026 | 76.3% | 292.8 |
| 22 Oct 2026 | 79.0% | 303 |
| 21 Oct 2026 | 91.5% | 351.2 |
| 20 Oct 2026 | 82.5% | 316.4 |
| 19 Oct 2026 | 74.9% | 287.3 |
| 18 Oct 2026 | 76.7% | 294.4 |
| 17 Oct 2026 | 82.3% | 315.6 |
| 16 Oct 2026 | 77.9% | 299 |
| 15 Oct 2026 | 78.8% | 302.1 |