On the morning of the 14th of Nisan the question arises: Must ḥametz that has been placed in the garbage also be destroyed?
If the garbage bin belongs to a Jew or is located on his property, the owner should, le-khatḥila, pour bleach or some other foul substance on the ḥametz to render it unfit for consumption by a dog. When necessary, since ḥametz that has been thrown into the garbage is considered disgusting, there is no need to further befoul it, as it is already deemed eradicated given its disgusting state.
If the garbage container is the property of the local authority and is located in the public domain, one need not destroy the ḥametz he placed in it before the ḥametz becomes prohibited. The local authority is not obligated to destroy it because it was not interested in acquiring the ḥametz to begin with. Its only aim was to remove it to a garbage dump.