aptly named Devil's Lake... the lake is polluted with this stuff
A Chicago waterway is still popularly called "Bubbly Creek" for its pollution back in the last half of the 1800's.
The beef slaughterhouses dumped their organic wastes into this creek. Gases from waste-decay constantly bubbled to the surface. "A great open sewer a hundred or two feet feet wide [with] all sorts of strange transformations[,] constantly in motion" Upton Sinclair, The Jungle, 1906