Popcorn ceilings are very commonly asbestos containing and is considered high risk in my locale. It's very easy to become airborne when disturbed, and will stay airborne for days. If you are going to remove it, please educate yourself on local removal and disposal procedures.

With that being said, no city landfill is going to be checking what's inside your garbage bags, but please protect yourself and others as much as possible.

I am an Asbestos certified demolition tech.