In Clean Water Act Case, Three Justices Invite Future Challenge to Rule of Deference to Agencies in Interpretation of Their Own Regulations

A victory in the Supreme Court is generally welcome news for the U.S. Environmental Protection Agency (EPA). But, the Court’s decision last month in a Clean Water Act case may foreshadow a sweeping change in administrative law that would certainly not please EPA or other agencies: the end of a long-standing rule of judicial deference to agencies in the interpretation of their own regulations.