EPA has the authority to respond to drinking water complaints on ICCs, such as trains or airplanes. The EPA Regional Office for the region within which the headquarters office of the ICC is located takes the lead in conducting inspections and responding to complaints. The state agencies are not responsible for drinking water quality inspections on ICCs. Additional guidance is available in Water Supply Guidance Memo 29; Plan for EPA Implementation of the Safe Drinking Water Act on Interstate Carrier Conveyances, October 1986. The Public Water System Supervision Program Water Supply Guidance Manual (EPA816-R-00-003, January 2000) is available at Public Water System Supervision Program Water Supply Guidance Manual | Safe Drinking Water Act | US EPA.