The United States welcomes the publication of the factual record on submission on enforcement matters (SEM) 04-005. The submission raised concerns about mercury releases to water in the United States from coal-fired power plants, and the factual record contains the factual findings of the Commission on Environmental Cooperation (CEC) Secretariat regarding the issue of whether the United States was effectively enforcing certain provisions of the Clean Water Act (CWA) with regard to mercury from some U.S. power plants.