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A portable or mobile toilet (colloquial terms: porta potty or porta john) is any type of toilet that can be moved around, some by one person, some by mechanical equipment. Most types do not require any pre-existing services or infrastructure, such as sewerage, but are completely self-contained.

They can be used in a variety of situations, for example in urban slums of developing countries, at festivals,events,concerts,sports for camping, or on boats. The chemical/plastic toilet is probably the most well-known type of portable toilet, but other types also exist.

A portable toilet is not connected to a hole in the ground (like a pit latrine), nor to a septic tank, nor is it plumbed into a municipal system leading to a sewage treatment plant; it can, by definition, be picked up and moved. Some portable toilets can be carried by one person, as in the main image, whereas others need heavy lifting equipment such as a truck and crane.