Another controversy would be certain POPs (which are continually active, specifically in the Arctic Biota) that were mentioned in the Stockholm Convention, but were not part of the Dirty Dozen such as Perfluorooctone sulfonates (PFOs).
Vastuolud olid ka kindlad POPid (mis on järjepidevalt aktiivsed, eriti arktilises elustikus), mida mainiti Stockholmi konventsioonis, aga need ei olnud osa 12 POP-ist, näiteks perfluorooktaansulfoonid (PFO).