CHAVANTES
São Paulo · PARANAPANEMA
Useful capacity
3,041.12 hm³
Coordinates
23.131°S, 49.733°W
Operator
ONS
84.3% of useful capacity
Current fill
84.3%of useful capacity
vs 7 days ago
+3.9 ppgaining
vs 1 year ago
+36.6 ppyear-over-year
7-day trend
↑rising
Drought context
Storage vs October average
131%of normal
84.3% full on 2026-10-26, against an average of 64.5% for October across 2 years of readings (+19.8 points).
Rain over the last three months · 11 October 2026
Very wet
In the three months to 11 October 2026 the area around CHAVANTES 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 +1.78). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 8,795 hm³ |
| Usable capacity | 3,041 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| Province | São Paulo |
| River basin | PARANAPANEMA |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 23.131°S, 49.733°W · Open in Google Maps
About CHAVANTES
As of October 26, 2026, CHAVANTES is at 84.3% of useful capacity, holding 2,562 hm³ of 3,041 hm³. Of the 8,795 hm³ total capacity, that is 29.1%. At this level the reservoir is high.
Over the most recent week on record the fill level has risen by 3.9 percentage points, and it is 36.6 points above its level on the same date a year earlier.
Across the readings we hold for CHAVANTES — 65 data points between October 26, 2025 and October 26, 2026 — the level has ranged from a low of 36.9% (March 6, 2026) to a high of 84.3% (October 26, 2026). On average the reservoir is fullest around October and at its lowest around March.
It is operated by ONS primarily for hydroelectric power. It lies within the PARANAPANEMA basin at 23.131°S, 49.733°W.
Key facts
- Current fill level
- 84.3% of useful capacity
- Water stored
- 2,562 hm³
- Total capacity
- 8,795 hm³
- Usable capacity
- 3,041 hm³
- 7-day change
- ▲ 3.9 pp
- Year-on-year
- ▲ 36.6 pp
- Primary use
- Hydroelectric power
- River basin
- PARANAPANEMA
- Operator
- ONS
- Coordinates
- 23.131°S, 49.733°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 84.3% | 2,562 |
| 25 Oct 2026 | 83.0% | 2,524 |
| 24 Oct 2026 | 79.8% | 2,428 |
| 23 Oct 2026 | 78.8% | 2,398 |
| 22 Oct 2026 | 78.5% | 2,386 |
| 21 Oct 2026 | 79.0% | 2,402 |
| 20 Oct 2026 | 79.2% | 2,409 |
| 19 Oct 2026 | 80.3% | 2,444 |
| 18 Oct 2026 | 81.9% | 2,490 |
| 17 Oct 2026 | 83.1% | 2,528 |
| 16 Oct 2026 | 83.9% | 2,551 |
| 15 Oct 2026 | 82.7% | 2,516 |