SALTO SANTIAGO
Paraná · IGUACU
Capacity
6,775 hm³
Coordinates
-25.628°N, 52.608°W
Operator
ONS
72.6% full
Current fill
72.6%vs 7 days ago
+1.0%gaining
vs 1 year ago
N/A7-day trend
→stable
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 6,775 hm³ |
| Usable capacity | 4,112.92 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. -25.628, -52.608 · Open in Google Maps
About SALTO SANTIAGO
As of September 9, 2026, SALTO SANTIAGO is filled to 72.6% of its total capacity, holding roughly 2,986 hm³ of water out of a maximum 6,775 hm³. At this level the reservoir is within its normal operating range. Of that total, about 4,113 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (+1.0 pts).
Across the readings we hold for SALTO SANTIAGO — 52 data points between September 26, 2025 and September 9, 2026 — the level has ranged from a low of 23.7% (April 24, 2026) to a high of 99.1% (November 14, 2025). On average the reservoir is fullest around November and at its lowest around April.
It is operated by ONS primarily for hydroelectric power. It lies within the IGUACU basin at 25.628°S, 52.608°W.
Key facts
- Current fill level
- 72.6%
- Water stored
- 2,986 hm³
- Total capacity
- 6,775 hm³
- Usable capacity
- 4,113 hm³
- 7-day change
- ▲ 1.0 pts
- Primary use
- Hydroelectric power
- River
- IGUAÇU
- River basin
- IGUACU
- Operator
- ONS
- Coordinates
- 25.628°S, 52.608°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 72.6% | 2,986 |
| 4 Sep 2026 | 71.6% | 2,947 |
| 28 Aug 2026 | 70.0% | 2,881 |
| 21 Aug 2026 | 72.1% | 2,965 |
| 14 Aug 2026 | 71.5% | 2,943 |
| 7 Aug 2026 | 70.9% | 2,917 |
| 31 Jul 2026 | 65.8% | 2,705 |
| 24 Jul 2026 | 65.7% | 2,703 |
| 17 Jul 2026 | 66.4% | 2,732 |
| 10 Jul 2026 | 69.6% | 2,863 |
| 3 Jul 2026 | 74.5% | 3,063 |
| 26 Jun 2026 | 78.5% | 3,229 |