Colombia10 departments · XM official data

Reservoir Watch

Storage levels across 24 hydropower reservoirs in the national grid. Colombia runs on hydropower, so its operator reports reservoir storage as energy (GWh) rather than water volume.

Average fill

74.8%

Energy stored

13.2 TWh

Reservoirs

Critical

Low level

⚡

Storage is measured as energy. Colombia's grid operator XM publishes reservoir levels as useful energy (GWh) — the electricity each reservoir could still generate — not as water volume (hm³). Fill % is useful energy ÷ useful capacity, directly comparable to other countries; the absolute figures are GWh, not cubic hectometres.

Colombia at a glance

National average fill

74.8%

13,213 of 17,658 GWh stored

Reservoirs

Departments

Total capacity

17.7 TWh

Energy stored

13.2 TWh

Critical

Low level

Coverage: XM — Operador del Mercado de Energía (wholesale electricity market). Tracks the reservoirs that feed Colombia's interconnected hydropower system. Last reading: 2026-10-08.

National fill — multi-year

Average fill

37.0%

33 GWh stored

By department

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All reservoirs

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Dataset coverage

70%of national storage capacity has public data

Tracked

reservoirs

With data

reservoirs

Tracked capacity

17,658

GWh

Source: XM — Operador del Mercado de Energía (Sinergox / servapibi)

Covers the hydropower reservoirs that feed Colombia’s national interconnected system (SIN). Storage is reported as useful energy (GWh).

About reservoirs in Colombia

As of October 8, 2026, the reservoirs we track across Colombia that report live levels hold roughly 13,213 GWh of water — about 74.8% of their combined capacity. Taken together, Colombia's reservoirs are within their normal operating range.

Across the region, 1 reservoir is at critically low levels and 2 are low. Esmeralda (Chivor) is the fullest at 95.7%, while Punchiná is the lowest at 15.7%.

Over the most recent week on record, 10 reservoirs rose and 6 reservoirs fell across Colombia.

Storage figures for Colombia come from XM; the most recent reading is from October 8, 2026. Each reservoir below links to its own page with full history and seasonal context.

Colombia at a glance

Reservoirs tracked: 24
Average fill: 74.8%
Water stored: 13,213 GWh
Combined capacity: 17,658 GWh
At critically low levels: 1
Fullest: Esmeralda (Chivor) (95.7%)
Lowest: Punchiná (15.7%)
Last updated: October 8, 2026