N. AVANHANDAVA
São Paulo · TIETE
Useful capacity
378 hm³
Coordinates
21.117°S, 50.202°W
Operator
ONS
84.2% of useful capacity
Current fill
84.2%of useful capacity
vs 7 days ago
+4.7 ppgaining
vs 1 year ago
-8.4 ppyear-over-year
7-day trend
↑rising
Drought context
Storage vs October average
96%of normal
84.2% full on 2026-10-26, against an average of 87.5% for October across 2 years of readings (-3.3 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around N. AVANHANDAVA 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 +0.51). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 2,720 hm³ |
| Usable capacity | 378 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | TIETÊ |
| Province | São Paulo |
| River basin | TIETE |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 21.117°S, 50.202°W · Open in Google Maps
About N. AVANHANDAVA
As of October 26, 2026, N. AVANHANDAVA is at 84.2% of useful capacity, holding 318.3 hm³ of 378 hm³. Of the 2,720 hm³ total capacity, that is 11.7%. At this level the reservoir is high.
Over the most recent week on record the fill level has risen by 4.7 percentage points, and it is 8.4 points below its level on the same date a year earlier.
Across the readings we hold for N. AVANHANDAVA — 65 data points between October 26, 2025 and October 26, 2026 — the level has ranged from a low of 55.3% (February 6, 2026) to a high of 97.9% (June 12, 2026). On average the reservoir is fullest around August and at its lowest around February.
It is operated by ONS primarily for hydroelectric power. It lies within the TIETE basin at 21.117°S, 50.202°W.
Key facts
- Current fill level
- 84.2% of useful capacity
- Water stored
- 318.3 hm³
- Total capacity
- 2,720 hm³
- Usable capacity
- 378 hm³
- 7-day change
- ▲ 4.7 pp
- Year-on-year
- ▼ 8.4 pp
- Primary use
- Hydroelectric power
- River
- TIETÊ
- River basin
- TIETE
- Operator
- ONS
- Coordinates
- 21.117°S, 50.202°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 84.2% | 318.3 |
| 25 Oct 2026 | 81.0% | 306.4 |
| 24 Oct 2026 | 83.7% | 316.3 |
| 23 Oct 2026 | 81.0% | 306.4 |
| 22 Oct 2026 | 81.6% | 308.4 |
| 21 Oct 2026 | 80.0% | 302.4 |
| 20 Oct 2026 | 81.6% | 308.4 |
| 19 Oct 2026 | 79.5% | 300.4 |
| 18 Oct 2026 | 78.4% | 296.4 |
| 17 Oct 2026 | 79.5% | 300.4 |
| 16 Oct 2026 | 76.8% | 290.5 |
| 15 Oct 2026 | 79.5% | 300.4 |