Minnesota cities are the first to systematically address the problem and to incur disposal costs. Part of this is due to the statewide ban, which also evidences the state’s concern for human and ecosystem health. While in the ponds, sediment coal tar waste does not create a public health concern. But it could if the sediment, once dredged, was not properly disposed of in contained landfills. That is why the cost of disposal is so high. Moreover, statewide thousands of ponds still need to be dredged; it is important to address the issue now before tens of millions of dollars in costs are incurred.