The Environmental Protection Agency announced May 16 that it will indefinitely postpone implementing new air pollution limits for large industrial boilers and solid waste incinerators while it reconsiders portions of the rules and addresses legal challenges. The agency said last week that additional time will allow it to solicit public comments through July 15 and compile additional emissions data. The rules issued in March established national emissions standards for hazardous air pollutants for major source industrial, commercial, and institutional boilers and process heaters and revised new source performances standards for commercial and industrial solid waste incinerators. Industry groups have since filed several more lawsuits challenging the rules, as May 20 was the deadline to file suit in the U.S. Court of Appeals for the District of Columbia Circuit.