Skip directly to search Skip directly to A to Z list Skip directly to site content
CDC Home

  Vessel Sanitation Program

Variances by Section
Click to view variances by: Section |  Cruise Ships
Click on the Section Number hyperlink below to view a list of cruise ships with the variances.
Operational Manual Section: POTABLE WATER Ensure that drinking water bunkered from shore supplies is potable. Where available, ensure that the vessel has a copy of the most recent microbiologic report from each port before bunkering potable water to verify that the water meets potable standards. Ensure that a distillation plant or other process that supplies water to the vessel's potable water system does not operate in polluted or harbor areas. Ensure potable water tanks do not share a common wall with the hull of the vessel or with tanks or piping containing nonpotable water or other liquids. Ensure that potable water tanks do not share a common wall with the hull of the vessel or with tanks containing non-potable water or other liquids. Disinfect after potential contamination by increasing the free residual halogen to at least 50 mg/L (ppm) throughout the affected area and maintain this concentration for 4 hours or by way of another procedure submitted to and accepted by VSP. Ensure that the halogenation device provides continuous halogenation of the potable water distribution system and maintains a free residual halogen of 0.2 mg/L (ppm) and 5.0 mg/L (ppm) throughout the distribution system. Ensure that at least one backup halogen pump is available with automatic switchover to maintain the free residual halogen in the event that the primary pump fails. Ensure that a minimum of four potable water samples per month are collected and analyzed for the presence of Escherichia coli and are collected randomly from locations forward, aft, upper, and lower decks of the vessel. Protect the potable water system against backflow or other contamination by backflow prevention devices or air gaps. Ensure the permeate lines and distillate lines directed toward the potable water system are also protected. The vessel shall provide a comprehensive cross- connection control program that provides safe connections to the potable water system through air gaps or appropriate backflow devices at the following locations, if present: (1) Potable water supply lines to swimming pools, whirlpool spas, hot tubs, bathtubs, showers, and similar facilities; (2) Photographic laboratory developing machines and utility sinks; (3) Beauty and barber shop spray-rinse hoses; (4) Potable water faucets where hoses are connected or can be connected by threaded or quick-connect outlets such as those serving tanks containing chlorine and other chemicals, and deck taps; (5) Garbage grinders and pulpers; (6) Mechanical warewashing machines; (7) Hospital and laundry equipment; (8) Air conditioning expansion tanks; (9) Boiler feed water tanks; (10) Fire systems; (11) Toilets; (12) Potable water, bilge, and sanitary pumps that require priming; (13) Freshwater or saltwater ballast systems; (14) Bilge or other waste water locations; (15) International shore connection; and (16) Any other connection between potable and non-potable water systems. The U.S. Government's Official Web PortalDepartment of Health and Human Services
Centers for Disease Control and Prevention   1600 Clifton Rd. Atlanta, GA 30333, USA
800-CDC-INFO (800-232-4636) TTY: (888) 232-6348; Email CDC-INFO