Two registers of toxicity emerge from this visualization--one, the idea of "pure Muskegon" which is tied to a comeback and revival of the area, which seems to be a form of toxicity by itself in that it enacts a particular visualization about pureness and futurity. The image itself wasn't clear but it seems to be an image of the unity symbol "under construction", which highlights how futurity and pureness is also under construction. the second, is about historical racial divide which is a sort of toxicity that is visible through the map.
The visualisation and the caption do not explicitly address toxics, but there is an implicit message of toxic urban development that excludes and differentiates on a racial basis.