Reservoir · Valle del Cauca · Colombia · XM
Alto Anchicayá
4.2% full
Capacity
36.51 GWh
Energy stored
2 GWh
River
Anchicayá
Coordinates
3.524°N, 76.868°W
Last updated
2026-09-09
Current fill
4.2%vs 7 days ago
-11.2%losing
vs 1 year ago
-56.0%year-over-year
7-day trend
↓falling
Data source: XM — Operador del Mercado de Energía — daily useful-energy storage (VoluUtilDiarEner) and useful capacity (CapaUtilDiarEner). Colombia is a hydropower system, so storage is reported as energy (GWh), not water volume; fill % is useful energy ÷ useful capacity. Last reading: 2026-09-09.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 3.524, -76.868 · Open in Google Maps
About Alto Anchicayá
As of September 9, 2026, Alto Anchicayá is filled to 4.2% of its total capacity, holding roughly 2 GWh of water out of a maximum 37 GWh. At this level the reservoir is critically low.
Over the most recent week on record the fill level has fallen by 11.2 percentage points, and it is 56.0 points below its level on the same date a year earlier.
Across the readings we hold for Alto Anchicayá — 2023 data points between January 1, 2021 and September 9, 2026 — the level has ranged from a low of 0.0% (March 19, 2022) to a high of 91.9% (November 25, 2021). On average the reservoir is fullest around November and at its lowest around September.
It is operated by XM primarily for hydroelectric power. It lies within the Anchicayá basin at 3.524°N, 76.868°W.
Key facts
- Current fill level
- 4.2%
- Water stored
- 2 GWh
- Total capacity
- 37 GWh
- 7-day change
- ▼ 11.2 pts
- Year-on-year
- ▼ 56.0 pts
- Primary use
- Hydroelectric power
- River
- Anchicayá
- River basin
- Anchicayá
- Operator
- XM
- Coordinates
- 3.524°N, 76.868°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (GWh) |
|---|---|---|
| 9 Sep 2026 | 4.2% | 2 |
| 8 Sep 2026 | 11.4% | 4 |
| 7 Sep 2026 | 7.6% | 3 |
| 6 Sep 2026 | 3.8% | 1 |
| 5 Sep 2026 | 11.7% | 4 |
| 4 Sep 2026 | 12.9% | 5 |
| 3 Sep 2026 | 17.8% | 7 |
| 2 Sep 2026 | 15.4% | 6 |
| 1 Sep 2026 | 13.5% | 5 |
| 31 Aug 2026 | 10.2% | 4 |
| 30 Aug 2026 | 11.9% | 4 |
| 29 Aug 2026 | 16.8% | 6 |