Ralco
Biobío
Capacity
1,174 hm³
Coordinates
37.998°S, 71.518°W
Operator
Dirección General de Aguas (DGA)
98.0% full
Current fill
98.0%vs 7 days ago
0.0%stable
vs 1 year ago
N/A7-day trend
→stable
Drought context
Rain over the last three months · 1 October 2026
Extremely wet
In the three months to 1 October 2026 the area around Ralco had exceptionally wet, seen about one year in forty. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index +2.67). Rain, not storage. Chile drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 1,174 hm³ |
| Usable capacity | 1,174 hm³ |
| Primary use | Hydroelectric |
| Operator | Dirección General de Aguas (DGA) |
| River | Biobío |
| Province | Biobío |
| Autonomous community | Biobío |
| River basin | Biobío |
About Ralco
As of October 13, 2026, Ralco is filled to 98.0% of its total capacity, holding roughly 1,155 hm³ of water out of a maximum 1,174 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts).
Across the readings we hold for Ralco — 1 data points between October 13, 2026 and October 13, 2026 — the level has ranged from a low of 98.0% (October 13, 2026) to a high of 98.0% (October 13, 2026).
It is operated by Dirección General de Aguas (DGA) primarily for hydroelectric power. It lies within the Biobío basin at 37.998°S, 71.518°W.
Key facts
- Current fill level
- 98.0%
- Water stored
- 1,155 hm³
- Total capacity
- 1,174 hm³
- 7-day change
- No change
- Primary use
- Hydroelectric power
- River
- Biobío
- River basin
- Biobío
- Operator
- Dirección General de Aguas (DGA)
- Coordinates
- 37.998°S, 71.518°W
- Last updated
- October 13, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 13 Oct 2026 | 98.0% | 1,155 |