Puentes Viejas reservoir

Madrid · Comunidad de Madrid

Tajo basin Reservoirs in Comunidad de Madrid

Province: Madrid
Basin: Tajo
River: Lozoya
Dam: Arch-gravity · 1940

60.4%

Current level

32 hm³

Stored water

53 hm³

Total capacity

-1.0 hm³

Weekly change

-8.0 hm³

Vs. 2025

-4.4 hm³

Vs. 10-year mean

Historical trend

Stored water volume · hm³

hm³

Weekly summary

The Puentes Viejas reservoir (embalse de Puentes Viejas), in the Tajo basin and linked to Puentes Viejas/Paredes de Buitrago, Madrid and Comunidad de Madrid, is at 60.4% of its capacity, holding 32 hm³ against a maximum capacity of 53 hm³. It is currently falling, by 1.0 hm³ this week.

Compared with 2025: below (-15.1 points). Compared with the recent historical mean: below (-8.3 points).

Its main uses include water supply.

References
Reference	Level	Difference
Previous week	62.3%	-1.9 pts
Same week 2025	75.5%	-15.1 pts
10-year mean	68.7%	-8.3 pts

Technical data

Characteristics of the dam and its recorded uses.

Characteristics

Municipality: Puentes Viejas/Paredes de Buitrago
River: Lozoya
Dam type: Arch-gravity
Year built: 1940
Surface area: 280 ha
Upstream: Riosequillo
Downstream: El Villar

Recorded uses

Water supply
Fishing
Boating
Swimming
Restaurants

Not recorded: irrigation, electricity, industrial, picnic.

Source: MITECO Inventory of Dams and Reservoirs.

Data: MITECO · AEMET