Madrid's Reservoirs at 72.2% at the Start of August

Stored water volume remains close to the historical average despite a July decrease and scarce rainfall.

Image of a reservoir in the Comunidad de Madrid with the water level visibly low.
IA

Image of a reservoir in the Comunidad de Madrid with the water level visibly low.

The Community of Madrid has started August with its reservoirs at 72.2% of maximum capacity, storing 681 cubic hectometers.

The thirteen infrastructures managed by Canal de Isabel II, which supply the region, show a water level very close to the historical average for this time of year, set at 73%. The reservoirs of El Atazar, Valmayor, and Santillana currently hold the largest volume.
After exceeding usual levels during spring, the stored volume has seen a natural decrease throughout June and July. Rainfall and contributions recorded last month have been below normal levels for the season.
In July, precipitation at the dams was practically non-existent, with barely one liter per square meter. This situation, combined with dry terrain due to high temperatures, has reduced water inflow to the reservoirs by half compared to usual figures for this month.
Despite this trend, Canal de Isabel II assures that the region's hydrological situation remains within normal parameters and guarantees supply for the coming months. However, the public company reminds the public of the importance of responsible water use, especially during summer when consumption typically increases.
Based on information from the official source: Comunidad de Madrid — Notas de prensa (04/08/2026)