I. SOLTEIRA
São Paulo · PARANA
Capacity
21,060 hm³
Coordinates
-20.380°N, 51.358°W
Operator
ONS
62.7% full
Current fill
62.7%vs 7 days ago
+0.4%gaining
vs 1 year ago
N/A7-day trend
→stable
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 21,060 hm³ |
| Usable capacity | 5,515.5 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | PARANÁ |
| Province | São Paulo |
| River basin | PARANA |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -20.380, -51.358 · Open in Google Maps
About I. SOLTEIRA
As of September 9, 2026, I. SOLTEIRA is filled to 62.7% of its total capacity, holding roughly 3,456 hm³ of water out of a maximum 21,060 hm³. At this level the reservoir is within its normal operating range. Of that total, about 5,516 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (+0.4 pts).
Across the readings we hold for I. SOLTEIRA — 52 data points between September 26, 2025 and September 9, 2026 — the level has ranged from a low of 54.9% (November 21, 2025) to a high of 92.5% (March 27, 2026). On average the reservoir is fullest around March and at its lowest around November.
It is operated by ONS primarily for hydroelectric power. It lies within the PARANA basin at 20.380°S, 51.358°W.
Key facts
- Current fill level
- 62.7%
- Water stored
- 3,456 hm³
- Total capacity
- 21,060 hm³
- Usable capacity
- 5,516 hm³
- 7-day change
- ▲ 0.4 pts
- Primary use
- Hydroelectric power
- River
- PARANÁ
- River basin
- PARANA
- Operator
- ONS
- Coordinates
- 20.380°S, 51.358°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 62.6% | 3,456 |
| 4 Sep 2026 | 62.2% | 3,433 |
| 28 Aug 2026 | 61.6% | 3,399 |
| 21 Aug 2026 | 64.3% | 3,546 |
| 14 Aug 2026 | 67.4% | 3,717 |
| 7 Aug 2026 | 68.2% | 3,763 |
| 31 Jul 2026 | 69.5% | 3,831 |
| 24 Jul 2026 | 65.9% | 3,637 |
| 17 Jul 2026 | 69.7% | 3,843 |
| 10 Jul 2026 | 76.5% | 4,222 |
| 3 Jul 2026 | 80.1% | 4,419 |
| 26 Jun 2026 | 78.2% | 4,315 |