Santillana reservoir

Madrid · Comunidad de Madrid

Tajo basin Reservoirs in Comunidad de Madrid

Province: Madrid
Basin: Tajo
River: Manzanares
Dam: Gravity · 1969

54.9%

Current level

50 hm³

Stored water

91 hm³

Total capacity

-1.0 hm³

Weekly change

-12.0 hm³

Vs. 2025

-2.4 hm³

Vs. 10-year mean

Historical trend

Stored water volume · hm³

hm³

Weekly summary

The Santillana reservoir (embalse de Santillana), in the Tajo basin and linked to Manzanares el Real, Madrid and Comunidad de Madrid, is at 54.9% of its capacity, holding 50 hm³ against a maximum capacity of 91 hm³. It is currently falling, by 1.0 hm³ this week.

Compared with 2025: below (-13.2 points). Compared with the recent historical mean: below (-2.6 points).

Its main uses include water supply, irrigation and hydroelectric power.

References
Reference	Level	Difference
Previous week	56.0%	-1.1 pts
Same week 2025	68.1%	-13.2 pts
10-year mean	57.6%	-2.6 pts

Technical data

Characteristics of the dam and its recorded uses.

Characteristics

Municipality: Manzanares el Real
River: Manzanares
Dam type: Gravity
Year built: 1969
Surface area: 1,044 ha
Upstream: Navacerrada
Downstream: El Pardo

Recorded uses

Water supply
Irrigation
Electricity
Fishing

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

Source: MITECO Inventory of Dams and Reservoirs.

Data: MITECO · AEMET