On March 25, 1978, Notre-Dame-du-Sacré-Cœur was annexed to the city of Brossard to solve the problem of providing sufficient services to and maintaining an adequate municipal government for such a small geographical area.
Brossard merged with Notre-Dame-du-Sacré-Cœur on March 25, 1978, to resolve the challenge of offering necessary services and keeping an effective local governance for this tiny region.