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

80.6%

Energy stored

14.1 TWh

Reservoirs

⚡

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

80.6%

14,053 of 17,440 GWh stored

Reservoirs

Departments

Total capacity

17.4 TWh

Energy stored

14.1 TWh

Coverage: XM — Operador del Mercado de Energía (wholesale electricity market). Tracks the reservoirs that feed Colombia's interconnected hydropower system. Last reading: 2026-07-26.

National fill — multi-year

62.4%

56 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

17,440

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 July 26, 2026, the reservoirs we track across Colombia that report live levels hold roughly 14,053 GWh of water — about 80.6% of their combined capacity. Taken together, Colombia's reservoirs are high.

None of the tracked reservoirs are currently at critically low levels. Guavio is the fullest at 96.2%, while Punchiná is the lowest at 46.9%.

Over the most recent week on record, 5 reservoirs rose and 2 reservoirs fell across Colombia.

Storage figures for Colombia come from XM; the most recent reading is from July 26, 2026. Each reservoir below links to its own page with full history and seasonal context.

Colombia at a glance

Reservoirs tracked: 24
Average fill: 80.6%
Water stored: 14,053 GWh
Combined capacity: 17,440 GWh
Fullest: Guavio (96.2%)
Lowest: Punchiná (46.9%)
Last updated: July 26, 2026

Frequently asked questions

How full are reservoirs in Colombia right now?

As of July 26, 2026, the reservoirs tracked in Colombia that report live levels are 80.6% full overall, holding about 14,053 GWh of water.

How many reservoirs are there in Colombia?

reservoirs.earth tracks 24 reservoirs in Colombia, with a combined storage capacity of 17,440 GWh.

Which reservoir in Colombia is the fullest?

Guavio is currently the fullest reservoir in Colombia, at 96.2% of capacity.

Which reservoir in Colombia is the lowest?

Punchiná is currently the lowest in Colombia, at 46.9% of capacity.

Where does the reservoir data for Colombia come from?

All storage figures for Colombia come from XM, an official source, last updated July 26, 2026.