The Environmental Protection Agency (EPA) has announced it will weaken cleanup requirements for hundreds of sites that contain waste from burning coal, a move that environmental groups argue could threaten drinking water for millions of people. The move is a victory for the coal industry, who had complained about a regulation requiring companies to examine the condition of coal ash sites at inactive power plants. The EPA plans to repeal this rule and modify other cleanup requirements. The changes are part of a broader effort by President Donald Trump to revive the coal sector. The proposal would allow companies to assess groundwater contamination 150 or more meters from a coal ash dump, rather than at the dump’s edge, creating a “zone of contamination.