I. SOLTEIRA
São Paulo · PARANA
Useful capacity
5,515.5 hm³
Coordinates
20.380°S, 51.358°W
Operator
ONS
63.1% of useful capacity
Current fill
63.1%of useful capacity
vs 7 days ago
-0.8 pplosing
vs 1 year ago
-0.2 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs October average
100%of normal
63.1% full on 2026-10-26, against an average of 63.2% for October across 2 years of readings (-0.1 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around I. SOLTEIRA had rain close to normal for the season. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index +0.07). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 21,060 hm³ |
| Usable capacity | 5,516 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°S, 51.358°W · Open in Google Maps
About I. SOLTEIRA
As of October 26, 2026, I. SOLTEIRA is at 63.1% of useful capacity, holding 3,478 hm³ of 5,516 hm³. Of the 21,060 hm³ total capacity, that is 16.5%. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (-0.8 pp), and it sits close to where it was a year earlier.
Across the readings we hold for I. SOLTEIRA — 65 data points between October 26, 2025 and October 26, 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
- 63.1% of useful capacity
- Water stored
- 3,478 hm³
- Total capacity
- 21,060 hm³
- Usable capacity
- 5,516 hm³
- 7-day change
- ▼ 0.8 pp
- Year-on-year
- ▼ 0.2 pp
- Primary use
- Hydroelectric power
- River
- PARANÁ
- River basin
- PARANA
- Operator
- ONS
- Coordinates
- 20.380°S, 51.358°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 63.1% | 3,478 |
| 25 Oct 2026 | 62.9% | 3,467 |
| 24 Oct 2026 | 62.6% | 3,456 |
| 23 Oct 2026 | 61.6% | 3,399 |
| 22 Oct 2026 | 62.4% | 3,444 |
| 21 Oct 2026 | 62.6% | 3,456 |
| 20 Oct 2026 | 63.5% | 3,501 |
| 19 Oct 2026 | 63.9% | 3,523 |
| 18 Oct 2026 | 63.9% | 3,523 |
| 17 Oct 2026 | 63.7% | 3,512 |
| 16 Oct 2026 | 63.5% | 3,501 |
| 15 Oct 2026 | 63.7% | 3,512 |