What waste do cruise ships produce?

Cruise ship waste streams Cruise ships generate a number of waste streams that can result in discharges to the marine environment, including sewage, graywater, hazardous wastes, oily bilge water, ballast water, and solid waste.



Cruise ships are essentially floating cities that produce a massive volume of diverse waste streams. A large ship with 3,000 passengers can generate up to 210,000 gallons of sewage (blackwater) and 1 million gallons of graywater (from showers and sinks) every week. Additionally, they produce significant amounts of solid waste, including about 8 tons of garbage and plastics weekly. Other waste includes oily bilge water from the engines, hazardous waste (like dry cleaning chemicals and batteries), and air emissions from heavy fuel oil. In 2026, many ships utilize Advanced Wastewater Treatment (AWT) systems and on-board incinerators to mitigate their impact, but the sheer volume remains a major environmental challenge, requiring strict adherence to international MARPOL regulations for disposal at sea and in ports.

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During a typical one-week voyage, a large cruise ship (with 3,000 passengers and crew) is estimated to generate 210,000 US gallons (790,000 L) of sewage; 1 million US gallons (3,800 m3) of graywater (wastewater from sinks, showers, and laundries); more than 130 US gallons (490 L) of hazardous wastes; 8 tons of solid ...

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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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A June study from sustainable transport campaigner The European Federation for Transport and Environment found that 63 cruise ships owned by parent company Carnival Corporation emitted 43% more sulfur oxides, a group of harmful air pollutants, than all the 291 million cars in Europe in 2022.

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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 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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On average, a cruise ship generates 15 gallons of toxic chemicals each day. These materials come from on-board dry cleaning and photo-processing facilities, painting and other activities. Seven thousand gallons of oily bilge water are released into the oceans every time the ship empties its bilge tanks.

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Food and drinking are usually complimentary on the cruises. You are also allowed to bring your own snack on the cruise so that you can have what you love. A certain time is fixed for every meal - breakfast, lunch, and dinner. You can either have it with everybody in the dining room or bring it to your room.

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Cruises are often known for decadence when it comes to food – it's available all day, every day, in unlimited portions, and it's certainly not all healthy. That said, it is possible to eat healthy while on a cruise ship – while still enjoying yourself, too!

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Ship exhaust contains harmful constituents, including metals and polycyclic aromatic hydrocarbons, many of which have toxic, possibly cancer-causing properties, Kennedy said: “It's dangerous it's not a healthy thing for us to be exposed to.”

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As people flock to cruise ships after the pandemic, health and sanitation conditions are still a big issue — including a record 13 norovirus outbreaks so far in 2023.

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Currently, cruise ships and other maritime vessels are responsible for nearly 3% of global greenhouse emissions each year. Considered to be worse than flying in terms of carbon emissions per passenger, a report by Pacific Standard revealed that a person's average carbon footprint triples in size while on a cruise.

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Barcelona; Venice, Italy; and Key West, Florida; have each moved to limit large cruise ships in recent years for similar reasons. But as they say, a picture is worth a thousand words. Take a look at these striking photos and see for yourself why more cities are saying no to cruise ships.

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What is the Safest Cruise Line? The CDC gave ships with Disney Cruise Lines a score of 96 or above on their 2016 inspections.

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A majority of cruise ship lines offer their employees free food throughout the duration of their contracts. There's typically a special kitchen on the boat that prepares food for staff members. Employees may eat in separate dining areas, depending on their classifications.

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For those with a degree in hospitality, among the highest-paying cruise ship jobs are executive chef, cruise director, chief purser, hotel director, and human resources manager. While the positions of captain and safety officer pay more, they require graduation from an accredited maritime training institution.

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It comes as no surprise that the ship's captain has the biggest salary from working on a cruise ship. The master of the vessel has a huge responsibility for ship safety for crew and passengers along with navigation. The captain can earn almost $100,000 manually depending on the cruise line and experience.

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