SALTO SANTIAGO
Paraná · IGUACU
Capacity
6,775 hm³
Coordinates
-25.628°N, 52.608°W
Operator
ONS
74.8% full
Current fill
74.8%vs 7 days ago
+2.2%gaining
vs 1 year ago
N/A7-day trend
↑rising
Drought context
Storage vs October average
85%of normal
74.8% full on 2026-10-12, against an average of 87.7% for October across 2 years of readings (-12.9 points).
Rain over the last three months · 21 September 2026
Very wet
In the three months to 21 September 2026 the area around SALTO SANTIAGO 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 +1.69). Rain, not storage. Brazil drought figures →
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 October 12, 2026, SALTO SANTIAGO is filled to 74.8% of its total capacity, holding roughly 3,077 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 risen by 2.2 percentage points.
Across the readings we hold for SALTO SANTIAGO — 52 data points between October 31, 2025 and October 12, 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
- 74.8%
- Water stored
- 3,077 hm³
- Total capacity
- 6,775 hm³
- Usable capacity
- 4,113 hm³
- 7-day change
- ▲ 2.2 pts
- Primary use
- Hydroelectric power
- River
- IGUAÇU
- River basin
- IGUACU
- Operator
- ONS
- Coordinates
- 25.628°S, 52.608°W
- Last updated
- October 12, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 12 Oct 2026 | 74.8% | 3,077 |
| 9 Oct 2026 | 73.7% | 3,031 |
| 2 Oct 2026 | 72.6% | 2,986 |
| 25 Sep 2026 | 72.8% | 2,993 |
| 18 Sep 2026 | 71.8% | 2,954 |
| 11 Sep 2026 | 72.0% | 2,961 |
| 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 |