Reservoir · Valle del Cauca · Colombia · XM
Alto Anchicayá
70.4% full
Capacity
36.51 GWh
Energy stored
26 GWh
River
Anchicayá
Coordinates
3.524°N, 76.868°W
Last updated
2026-10-27
Current fill
70.4%vs 7 days ago
+17.9 ppgaining
vs 1 year ago
+44.4 ppyear-over-year
7-day trend
↑rising
Drought context
Storage vs October average
192%of normal
70.4% full on 2026-10-27, against an average of 36.7% for October across 6 years of readings (+33.7 points).
Rain over the last three months · 11 October 2026
Extremely dry
In the three months to 11 October 2026 the area around Alto Anchicayá had extremely little rain for the season, a shortfall 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 −3.48). Rain, not storage. Colombia drought figures →
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: 2026-10-27.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 3.524°N, 76.868°W · Open in Google Maps
About Alto Anchicayá
As of October 27, 2026, Alto Anchicayá is filled to 70.4% of its total capacity, holding 25.69 GWh of water out of a maximum 36.51 GWh. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has risen by 17.9 percentage points, and it is 44.4 points above its level on the same date a year earlier.
Across the readings we hold for Alto Anchicayá — 2071 data points between January 1, 2021 and October 27, 2026 — the level has ranged from a low of 0.0% (March 19, 2022) to a high of 90.9% (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
- 70.4% of total capacity
- Water stored
- 25.69 GWh
- Total capacity
- 36.51 GWh
- 7-day change
- ▲ 17.9 pp
- Year-on-year
- ▲ 44.4 pp
- Primary use
- Hydroelectric power
- River basin
- Anchicayá
- Operator
- XM
- Coordinates
- 3.524°N, 76.868°W
- Last updated
- October 27, 2026
Recent readings
| Date | Fill level | Volume (GWh) |
|---|---|---|
| 27 Oct 2026 | 70.4% | 25.69 |
| 26 Oct 2026 | 72.3% | 26.41 |
| 25 Oct 2026 | 74.8% | 27.3 |
| 24 Oct 2026 | 52.5% | 19.18 |
| 23 Oct 2026 | 30.3% | 11.06 |
| 22 Oct 2026 | 41.0% | 14.98 |
| 21 Oct 2026 | 51.3% | 18.72 |
| 20 Oct 2026 | 52.5% | 19.18 |
| 19 Oct 2026 | 62.9% | 22.98 |
| 18 Oct 2026 | 63.9% | 23.33 |
| 17 Oct 2026 | 52.9% | 19.3 |
| 16 Oct 2026 | 35.5% | 12.95 |