Reservoir · Antioquia · Colombia · XM
Riogrande II
49.0% full
Capacity
543.75 GWh
Energy stored
266 GWh
River
Grande
Coordinates
6.516°N, 75.456°W
Last updated
2026-09-09
Current fill
49.0%vs 7 days ago
+1.3%gaining
vs 1 year ago
-49.1%year-over-year
7-day trend
→stable
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. 6.516, -75.456 · Open in Google Maps
About Riogrande II
As of September 9, 2026, Riogrande II is filled to 49.0% of its total capacity, holding roughly 266 GWh of water out of a maximum 544 GWh. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (+1.3 pts), and it is 49.1 points below its level on the same date a year earlier.
Across the readings we hold for Riogrande II — 2078 data points between January 1, 2021 and September 9, 2026 — the level has ranged from a low of 6.6% (March 25, 2024) to a high of 105.0% (May 6, 2021). On average the reservoir is fullest around November and at its lowest around March.
It is operated by XM primarily for hydroelectric power. It lies within the Grande basin at 6.516°N, 75.456°W.
Key facts
- Current fill level
- 49.0%
- Water stored
- 266 GWh
- Total capacity
- 544 GWh
- 7-day change
- ▲ 1.3 pts
- Year-on-year
- ▼ 49.1 pts
- Primary use
- Hydroelectric power
- River
- Grande
- River basin
- Grande
- Operator
- XM
- Coordinates
- 6.516°N, 75.456°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (GWh) |
|---|---|---|
| 9 Sep 2026 | 49.0% | 266 |
| 8 Sep 2026 | 48.6% | 264 |
| 7 Sep 2026 | 48.3% | 263 |
| 6 Sep 2026 | 48.5% | 264 |
| 5 Sep 2026 | 48.2% | 262 |
| 4 Sep 2026 | 47.9% | 261 |
| 3 Sep 2026 | 47.8% | 260 |
| 2 Sep 2026 | 47.7% | 259 |
| 1 Sep 2026 | 47.0% | 256 |
| 31 Aug 2026 | 48.6% | 264 |
| 30 Aug 2026 | 50.3% | 274 |
| 29 Aug 2026 | 51.6% | 281 |