It has nothing to do with sewage. Blackwater got it names from the swamps surrounding the area: "the Great Dismal Swamp, a vast swamp on the North Carolina/Vi

It has nothing to do with sewage. Blackwater got it names from the swamps surrounding the area: "the Great Dismal Swamp, a vast swamp on the North Carolina/Virginia border, now mostly a National Wildlife Refuge...There, he created his state-of-the-art private training facility and his contracting company, Blackwater, which he named for the peat-colored water of the swamp.[10]" But apparently if Blackwater wanted to shot the person that named it they can do that.