The 10 nastiest cruise ships of all time

• The Centers for Disease Control and Prevention (CDC) inspects cruise ships to see if they have sanitary issues that could put passengers at risk of getting sick.

• The vast majority of ships receive passing grades of at least 86 out of 100 points, but a handful have failed.

• The lowest inspection score the CDC has given is 36.

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The Centers for Disease Control and Prevention (CDC) inspects cruise ships to see if they have sanitary issues that could put passengers at risk of getting sick.

The vast majority of ships receive passing grades of at least 86 out of 100 points, but a handful have failed for reasons like storing food at improper temperatures and not having sufficient procedures for handling drinking water. The 10 lowest-scoring inspections the CDC has ever conducted fall between 1995 and 2017, though six of them happened over 10 years ago.

These are the 10 lowest inspection scores the CDC has ever given a cruise ship.

Read more:

• Carnival got hit with a $20 million fine after dumping garbage into the ocean, but it's not the only cruise line guilty of trashing the sea, an expert says

• Trump just banned US cruise ships, yachts, and private planes from traveling to Cuba

• A lawyer who represents cruise-ship workers reveals one thing passengers do that's awful for some workers

• Carnival slapped with a $20 million fine after it was caught dumping trash into the ocean, again

Related: Cruise members biggest secrets

See Also:

• The CEO of the world's biggest cruise company reveals the advice he would give to his 25-year-old self

• Carnival got hit with a $20 million fine after dumping garbage into the ocean, but it's not the only cruise line guilty of trashing the sea, an expert says

• I flew on Southwest Airlines to see how it compared to Delta and United — here's what I found

SEE ALSO: A former cruise ship HR manager reveals one thing that will get workers fired immediately: sex with the wrong person