Instructions for Cleaning and Disinfecting a Water Delivery Truck Summary Drinking water haulage trucks MUST be cleaned and disinfected at least once per year, or more often if required or directed by the Chief Public Health Officer. Current Resource Instructions for Cleaning and Disinfecting a Water Delivery Truck PDF • 108.79KB • Issued April 30, 2006 Download Instructions for Cleaning and Disinfecting a Water Delivery Truck