Other
Eco Usa: Index of State Superfund Sites
Choose a state and get information on all of the toxic waste sites within that state individually. External links on each state's page may no longer work but the list of sites is there and can be found through a Google search.
Other
Distribution of Toxic Waste Sites and Public Housing
This site provides an index of maps dealing with the distribution of toxic waste sites. It also includes maps and information about public housing within one mile of toxic waste sites in the US and Texas.