The Government Accountability Office reported July 23 that a significant number of coal-fired electricity generating unites have not obtained new source review permits as required. The Environmental Protection Agency has investigated 831 coal-fired units since 1999 through its power plant enforcement initiative, and the agency has alleged noncompliance at 467 units. Under the Clean Air Act’s new source review permitting program, new and modified industrial sources must obtain permits that require emissions limits and the installation of emissions controls. In 1999, the agency launched a coal-fired power plant enforcement initiative to address new source review compliance.