EPA’s Office of Water has asked the SAB Drinking Water Committee to provide a consultation on a proposed Aircraft Drinking Water Rule. Under the Safe Drinking Water Act, any interstate carrier conveyance (ICC) that regularly serves drinking water to an average of at least 25 individuals daily, at least 60 days per year, is subject to the National Primary Drinking Water Regulations (NPDWR). The U.S. EPA is responsible for developing and implementing the NPDWRs for all public water systems, including public water systems on ICCs. The existing NPDWRs were designed for traditional, stationary public water systems, not mobile aircraft water systems that are operationally very different. EPA is proposing an Aircraft Drinking Water Rule (ADWR) that addresses onboard water systems for aircraft within U.S. jurisdiction. In addition, EPA is also supporting an international effort led by the World Health Organization to develop international guidelines for aircraft drinking water.