AMTRAK, THE PRIMARY NATIONAL PASSENGER RAILWAY, PROVIDES WATER FOR DRINKING AND SANITARY PURPOSES TO THE CREW AND PASSENGERS ON ITS RAIL CARS. EACH RAILCAR THAT PROVIDES WATER IS A TRANSIENT NON-COMMUNITY DRINKING WATER SYSTEM. UNDER THE SDWA, EPA DIRECTLY REGULATES INTERSTATE CARRIER CONVEYANCES (ICCS), SUCH AS TRAINS AND AIRPLANES, WITHOUT DELEGATION TO STATE AGENCIES. AMTRAK OWNS OR OPERATES APPROXIMATELY 1,500 RAILCARS THAT SERVE WATER TO AT LEAST 25 PEOPLE/60 DAYS. THIS INCLUDES RAILCARS WHERE AMTRAK ACTS AS A CONTRACT OPERATOR FOR RAILCAR MAINTENANCE. TO PROTECT AGAINST MICROBIOLOGICAL CONTAMINATION, AMTRAK MUST MONITOR, DISINFECT, AND FLUSH ITS RAILCARS' DRINKING WATER EQUIPMENT. THIS ORDER REPLACES SDWA-03-2012-0113-DS.