Coal Ash Map Key     

1 = Power plants with coal ash using multiple disposal methods.
2 = Power plants with coal ash in landfills and disposal ponds and on EPA danger list.
4 = Power plants with coal ash using pond disposal.
5 = Power plants with coal ash in disposal ponds and on EPA danger list.
6 = Power plants with coal ash using landfill disposal.
7 = Power plants with coal ash in landfills and on EPA danger list.
8 = Coal ash in landfills or ponds and on EPA danger list, offsite from power plants.