Valmayor reservoir

Madrid · Comunidad de Madrid

Tajo basin Reservoirs in Comunidad de Madrid

Province: Madrid
Basin: Tajo
River: Aulencia
Dam: Embankment, asphalt face · 1975

67.7%

Current level

84 hm³

Stored water

124 hm³

Total capacity

0.0 hm³

Weekly change

-18.0 hm³

Vs. 2025

+2.9 hm³

Vs. 10-year mean

Historical trend

Stored water volume · hm³

hm³

Weekly summary

The Valmayor reservoir (embalse de Valmayor), in the Tajo basin and linked to Valdemorillo, Madrid and Comunidad de Madrid, is at 67.7% of its capacity, holding 84 hm³ against a maximum capacity of 124 hm³. It is currently steady in the latest update.

Compared with 2025: below (-14.5 points). Compared with the recent historical mean: above (+2.3 points).

Its main uses include water supply and irrigation.

References
Reference	Level	Difference
Previous week	67.7%	0.0 pts
Same week 2025	82.3%	-14.5 pts
10-year mean	65.4%	+2.3 pts

Technical data

Characteristics of the dam and its recorded uses.

Characteristics

Municipality: Valdemorillo
River: Aulencia
Dam type: Embankment, asphalt face
Year built: 1975
Surface area: 755 ha
Upstream: — no data
Downstream: Castrejón

Recorded uses

Water supply
Irrigation
Fishing

Not recorded: electricity, industrial, boating, swimming, picnic, restaurants.

Source: MITECO Inventory of Dams and Reservoirs.

Data: MITECO · AEMET