Communauté d'agglomération Plaine Vallée is the communauté d'agglomération, an intercommunal structure, covering northwestern suburbs of Paris. It is located in the Val-d'Oise department, in the Île-de-France region, northern France. Established in November 2015, effective from January 2016, its seat is in Montmorency.CA Plaine Vallée (N° SIREN : 200056380), BANATIC, accessed 4 November 2024. Its area is 74.1 km,2 and its population was 184,945 in 2021.Comparateur de territoire, INSEE, accessed 4 November 2024.
Composition The communauté d'agglomération consists of the following 18 communes:
Andilly Attainville Bouffémont Deuil-la-Barre Domont Enghien-les-Bains Ézanville Groslay Margency Moisselles Montlignon Montmagny Montmorency Piscop Saint-Brice-sous-Forêt Saint-Gratien Saint-Prix Soisy-sous-Montmorency
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