Do cruise ships use desalination for drinking water?

How do cruise liners get, and keep, fresh water on board – eg for drinking? Cruise ships are of course, surrounded by water, but it needs to be made suitable for use by the passengers, so all ships have desalination systems on-board, which remove salt and impurities and turn it into fresh water.



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Today's cruise ships use potable water in toilets and showers, thanks to engineering ingenuity resulting in onboard water desalination systems. Ocean water desalination plants remove salt and impurities from sea water, rendering it safe for human consumption, providing a much more pleasant cruising experience.

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Cruise ships make their own drinking water. It's unsurprising since they're constantly surrounded by sea water – they use either steam evaporation or reverse osmosis processes to desalinate the water before minerals and chlorine are added. It's the same as a home filtration system, only significantly larger.

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Cruise ship tap water is safe to drink unless you are told otherwise by the ship's authorities. The water throughout the ship has been treated, filtered and frequently tested to meet the standards of the World Health Organization and the U.S. Public Health Service on ships sailing into and out of U.S. ports of call.

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Cruise ship tap water is safe to drink unless you are told otherwise by the ship's authorities. The water throughout the ship has been treated, filtered and frequently tested to meet the standards of the World Health Organization and the U.S. Public Health Service on ships sailing into and out of U.S. ports of call.

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Advances in membrane technology have made desalination of seawater and brackish waters an increasingly viable alternative to produce safe drinking-water.

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When a toilet is flushed on a cruise ship, the sewage travels to the onboard treatment plant. Here the waste is filtered before it enters an aeration chamber. The aeration chamber cleans the waste. It is then sterilized using UV light and released into the ocean when clean enough to do so.

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Cruise lines drain their swimming pools at night to discourage guests from trying to enter the pool when it is closed. Draining the swimming pools each night also allows the cruise lines to replace the water with clean water and a drained swimming pool is safer if the weather is rough.

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Cruise ship pools are usually filled with saltwater which has been chemically treated. On some cruise ships, you will find freshwater pools but these are less common. It is possible to have a cruise ship where some pools are fresh and some saltwater, this is very common on Royal Caribbean cruise ships.

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Tap water on cruise ships is safe to drink. Guests can drink tap water either from the tap in their cabin bathroom or at dinner when it is offered. The water has been through a purification system and though it may not taste the best on all cruise ships, it's safe to drink.

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Shipboard potable water (drinking, bathing, whirlpools, etc.) either comes from a shoreside water treatment plant or is generated on board from seawater via Reverse Osmosis systems or Evaporators. Swimming pool water is typically seawater.

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Desalination aboard naval vessels is used in ways that are very similar to the civilian uses of desalination plants. Keeping vessels stocked with fresh water has a long history that has led to the use of desalination and RO units being added to navy vessels.

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Shipboard potable water (drinking, bathing, whirlpools, etc.) either comes from a shoreside water treatment plant or is generated on board from seawater via Reverse Osmosis systems or Evaporators. Swimming pool water is typically seawater.

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The easiest way for ships to do this is to liquefy the leftover food in an industrial grinder. The food is blended with water until it's a smooth mixture and then either disposed of in port, incinerated, or pumped out to sea when the ship is deep water and away from the coastlines. Simple as that.

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Do lifeboats have bathrooms? Traditional 150-person lifeboats don't have toilet facilities, but the 370-person catamaran lifeboats used on Royal Caribbean's Oasis-class ships do.

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Water is a precious resource onboard a cruise ship, so modern ships save gallons with each flush by using a vacuum system. The sounds your toilet make include a scary whoosh (unfortunately, loud enough to be heard in the hallways) followed by a series of thumps as valves in the system close.

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Keep in mind that all drinking water that's available on a cruise ship is required to go through a strict testing system. Even though ocean water is filtered before any passengers drink it, the B12 and D3 vitamins that can naturally be found in ocean water still remain.

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Yes. All drinking water is either distilled from seawater or loaded onboard while the ship is in port. Royal Caribbean adheres to Vessel Sanitation Program standards published by the U.S. Public Health Service (USPHS).

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