August 20 2022

Citizen's Day

For the occasion, the OSM will be present to offer you a grandiose show at the school-park of Externat Sacré-Coeur.

All details to come on the website.

What’s happening

  • Send us your water meter reading
  • New! Online tax bills
  • Former Golf Course Dossier
  • Voilà! Rosemère
  • Roadwork-Info