Arising from needs expressed by the local political and economic milieus, DEL was created in 2002 to provide the Agglomération de Longueuil with sufficient economic clout to assist in self-development.

DEL is a not-for-profit organization offering services to all cities in the Agglomération de Longueuil, including Boucherville, Brossard, Longueuil (Old-Longueuil, Saint-Hubert and Greenfield Park), Saint-Bruno-de-Montarville and Saint-Lambert.

DEL’s activities are authorized by its board of directors, who are named by the Agglomération de Longueuil Council. The Council also defines DEL’s powers and mandate.