US environmental regulators fix errors in rules for old coal ash dumps

The US environmental regulators are correcting mistakes in a rule about how to manage old coal ash ponds. This means the requirements for cleaning up these sites are now clearer and more precise.

The US has hundreds of old coal ash dumps, many of them leaking toxic materials into groundwater. The original rules for these 'legacy' sites were complex and had errors. This correction clarifies who is responsible and what they must do, which could speed up cleanup efforts. It also means fewer legal challenges based on unclear language.