Reservoir · Antioquia · Colombia · XM
San Lorenzo
72.7% full
Capacity
425.74 GWh
Energy stored
310 GWh
River
Nare
Coordinates
6.191°N, 74.944°W
Last updated
2026-09-09
Current fill
72.7%vs 7 days ago
-14.6%losing
vs 1 year ago
-23.0%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. 6.191, -74.944 · Open in Google Maps
About San Lorenzo
As of September 9, 2026, San Lorenzo is filled to 72.7% of its total capacity, holding roughly 310 GWh of water out of a maximum 426 GWh. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 14.6 percentage points, and it is 23.0 points below its level on the same date a year earlier.
Across the readings we hold for San Lorenzo — 2078 data points between January 1, 2021 and September 9, 2026 — the level has ranged from a low of 6.3% (April 9, 2024) to a high of 105.0% (May 5, 2021). On average the reservoir is fullest around August and at its lowest around April.
It is operated by XM primarily for hydroelectric power. It lies within the Nare basin at 6.191°N, 74.944°W.
Key facts
- Current fill level
- 72.7%
- Water stored
- 310 GWh
- Total capacity
- 426 GWh
- 7-day change
- ▼ 14.6 pts
- Year-on-year
- ▼ 23.0 pts
- Primary use
- Hydroelectric power
- River
- Nare
- River basin
- Nare
- Operator
- XM
- Coordinates
- 6.191°N, 74.944°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (GWh) |
|---|---|---|
| 9 Sep 2026 | 72.7% | 309 |
| 8 Sep 2026 | 74.8% | 318 |
| 7 Sep 2026 | 76.5% | 326 |
| 6 Sep 2026 | 78.3% | 333 |
| 5 Sep 2026 | 80.2% | 341 |
| 4 Sep 2026 | 82.7% | 352 |
| 3 Sep 2026 | 85.2% | 363 |
| 2 Sep 2026 | 87.3% | 371 |
| 1 Sep 2026 | 85.5% | 364 |
| 31 Aug 2026 | 83.6% | 356 |
| 30 Aug 2026 | 83.9% | 357 |
| 29 Aug 2026 | 82.3% | 351 |