The Environmental Protection Agency told the U.S. District Court for the District of Columbia May 30 that the it sent a proposed rule that would set air pollution standards for particulate matter to the White House Office of Management and Budget May 29 for interagency review. Advocacy groups and a number of states have asked the court to compel the agency to review the national ambient air quality standards for particulate matter, and the agency has said that it needs until next August 5 to issue a final rule.