dumpsite

From dump +‎ site.

dumpsite (plural dumpsites)

1. A dump for garbage, usually a dump that is actively in use; or the location of such a dump
   • 2009 April 22, Christopher Hume, “Disposables a luxury we must trash”, in Toronto Star‎^[1]:

     Same thing with the plastic bag, which has grown so ubiquitous, it's well on the way to turning Earth into one vast dumpsite.

• dumpiest