Containers with any quantity in them should come to a Household Hazardous Waste Collection Event.  Your local hardware store may take them as well. Both latex and acrylic paint are safe to go in the trash as long as the contents are completely dried up.  If there is a little bit in the can, take the lid off and let it air dry (keep away from children and pets).  If there is a lot in the can you can add saw dust or crumpled up newspaper and once that is dry, it can go in the trash. If you have a full can that you want to get rid of, contact 855-724-6809 or visit www.paintcare.org for a list of locations that accept paint.