Casa de l'Aigua is a station on Line 11 of the Barcelona Metro.

It is located in the neighborhood of la Trinitat Nova, in the Nou Barris district of Barcelona.

The station is underground, beneath Pas d'Antonio Cuadrillero on the foothills of the Collserola mountain range that overlooks la Trinitat Nova neighborhood in Nou Barris.

[3] In 2024, Casa de l'Aigua was the least used station in the Barcelona Metro network according to official TMB data, with 46.884 passengers.

TMB CEO Xavier Flores pointed to the station's proximity to Trinitat Nova to explain Casa de l'Aigua's low passenger volume.