As your Servant and your swarms spread out to destroy any sign of corruption they can find, you get the impression that while your sub-district is certainly affected, it doesn't seem to be originating from this sub-district. You are able to claw out a lot of the corruption, but since you didn't find any totems or anything that was the source of it, you doubt this will stop any future spread of the corruption in the area. However, for now the whispers have subsided, although you cannot be certain for how long...