I. SOLTEIRA
São Paulo · PARANA
Capacity
21,060 hm³
Coordinates
-20.380°N, 51.358°W
Operator
ONS
67.6% full
Current fill
67.6%vs 7 days ago
+1.7%gaining
vs 1 year ago
+5.4%year-over-year
7-day trend
↑rising
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 July 28, 2026, I. SOLTEIRA is filled to 67.6% of its total capacity, holding roughly 3,729 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 risen by 1.7 percentage points, and it is 5.4 points above its level on the same date a year earlier.
Across the readings we hold for I. SOLTEIRA — 52 data points between August 15, 2025 and July 28, 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
- 67.6%
- Water stored
- 3,729 hm³
- Total capacity
- 21,060 hm³
- Usable capacity
- 5,516 hm³
- 7-day change
- ▲ 1.7 pts
- Year-on-year
- ▲ 5.4 pts
- Primary use
- Hydroelectric power
- River
- PARANÁ
- River basin
- PARANA
- Operator
- ONS
- Coordinates
- 20.380°S, 51.358°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 67.6% | 3,729 |
| 24 Jul 2026 | 65.9% | 3,637 |
| 17 Jul 2026 | 69.7% | 3,843 |
| 10 Jul 2026 | 75.9% | 4,187 |
| 3 Jul 2026 | 80.1% | 4,419 |
| 26 Jun 2026 | 78.2% | 4,315 |
| 19 Jun 2026 | 77.0% | 4,245 |
| 12 Jun 2026 | 68.2% | 3,763 |
| 5 Jun 2026 | 62.6% | 3,456 |
| 29 May 2026 | 61.0% | 3,365 |
| 22 May 2026 | 59.4% | 3,275 |
| 15 May 2026 | 56.5% | 3,117 |
Frequently asked questions
What is the current water level of I. SOLTEIRA?
As of July 28, 2026, I. SOLTEIRA is at 67.6% of its capacity, holding approximately 3,729 hm³ of water, according to ONS – Operador Nacional do Sistema Elétrico data.
Is I. SOLTEIRA reservoir full?
No. As of July 28, 2026, I. SOLTEIRA is within its normal operating range at 67.6% of its capacity, so it is not full.
Is the water level at I. SOLTEIRA rising or falling?
The level at I. SOLTEIRA is rising — it gained 1.7 percentage points over the latest week on record.
How much water can I. SOLTEIRA hold?
I. SOLTEIRA has a total capacity of 21,060 hm³, of which about 5,516 hm³ is usable storage.
Where is I. SOLTEIRA reservoir located?
I. SOLTEIRA is located in São Paulo, Brazil, within the PARANA basin (coordinates 20.380°S, 51.358°W).
What is I. SOLTEIRA used for?
I. SOLTEIRA is used primarily for hydroelectric power, and is managed by ONS.