Once solidified, latex paint can be placed at the curb with your normal household trash, as well as empty paint cans. To help speed up the solidification process, mix unwanted paint with an absorbent such as cat litter, or sand, and leave the lid off until the paint has hardened.
On the other hand, oil-based paints, varnishes, stains, epoxy’s, and other similar chemicals cannot be disposed of with your normal household trash. These type of products need to be brought to the Hamilton County Household Hazardous Waste Center, or taken to a private firm for proper disposal.