potable water on board trains vessels aircraft and buses regulations 35 pages available in english and french there are potential public health risks to travellers associated with water supplied on board conveyances. the 1954 potable water regulations for common carriers pwrcc are federal regulations that aim to manage these risks. the pwrcc include provisions related to water disinfection water quality and vessel construction that no longer reflect the latest industry or scientific standards. consequently new regulations with modernized requirements are being proposed to hel ensure the continued protection of the travelling public in canada. the proposed regulations would apply to water supplied on board passenger conveyances for the purposes of drinking handwashing and oral hygiene and for the preparation of food for passengers in canada. conveyance operators providing water to passengers for any of those purposes would need to ensure that it is potable and provided in sufficient quantity for its intended purpose. conveyance operators could supply water and ice from pre-packaged products a potable water system or from potable water containers. conveyance operators would need to take measures to ensure that water is free from contamination when it is taken from a water supply and that it is handled in a manner that prevents the risk of contamination on board. water would need to be free of e. coli. operators would be required to sample and analyse water from on-board water systems for eschericia coli e. coli on a routine basis and ensure associated records are kept and accessible for one year. conveyance operators would be required to disinfect decontaminate repair or replace and flush on-board potable water systems should the water or the system be contaminated or suspected of contamination. conveyance operators would also need to investigate the source of suspected or confirmed contamination assess possible contamination effects on the rest of their fleets and ensure records about water supplies system activities and sampling results would be kept and accessible for one year. foreign operators of conveyances with only a single sto in canada per tri for passengers to embark or disembark would be excluded from the routine e. coli sampling requirements and from having to complete an assessment on whether contamination could have affected the other conveyances in the operators fleet though they would be subject to the other regulatory requirements.