Pit latrines are a type of<unk>  and are in use in some rural areas (Herøy, Norway)There are several types of toilets which are referred to as<unk> s". All of them work without flush water and without a connection to a sewer system or septic tank: * Composting toilet (in most cases without urine diversion but can also be with urine diversion) * Urine-diverting<unk>  – with urine diversion, as the name implies * Urine-diverting flush toilet - Same type of toilet as UDDT but with flushing water. * Arborloo – which is similar to a pit latrine but has a much shallower pit and is designed for making compost in the pit * Treebog - a low-tech compost toilet consisting of a raised platform above a compost pile surrounded by densely planted willow trees or similar. * Container-based toilet - where human excreta is collected in sealable, removable containers (also called cartridges) that are transported to treatment facilities (a sub-type are "packaging toilets" where feces from each defecation event is placed in its own package) * Bucket toilet – a very basic type of<unk>  consisting only of a bucket which could be upgraded with urine diversion and the use of covering material * Simple pit latrines: those pit latrines that do not have a water seal (pour flush pit latrines have a water seal and are therefore not<unk> s). * Incinerating toilets, freezing toilets – these are toilets with more complicated technology and higher costs Other types of<unk> s are under development at universities, for example since 2012 funded by the Bill and Melinda Gates Foundation. Such toilets are meant to operate off-the-grid without connections to water, sewer, or electrical lines. Terminology One important source states that the term<unk> " should only refer to the "user interface" and not the subsequent storage and treatment steps. However, in the WASH sector, the term<unk> " is still used differently by different people. It often includes also the storage and treatment steps. For example, it is common that the term<unk> " is used to refer specifically to a urine-diverting<unk>  or a composting toilet. People also use the term to refer to a pit latrine without a water seal even though the pit of a pit latrine is not usually<unk> . The pit can become very wet because urine mixes with feces in the pit and drainage might be limited. Also, groundwater or surface water can also get into the pit in the event of heavy rains or flooding. Sometimes households even discard greywater (from showering) into the same pit. Some publications use the term "dry sanitation" to denote a system that includes<unk> s (in particular urine-diverting<unk> s) connected to a system to manage the excreta. However, this term is not in widespread use nowadays, and might rather be replaced with "non sewer-based sanitation" or "non-sewered sanitation" (see also fecal sludge management). The term "outhouse" refers to a small structure, separate from a main building, which covers a pit toilet or a<unk> . Although it strictly refers only to the structure above the toilet, it is often used to denote the entire toilet structure, i.e. including the hole in the ground in the case of a pit latrine. Gallery File:Cleaning a urine-diverting<unk>  (UDDT) in Johannesburg (2947142348).A urine-diverting<unk>  in South Africa. File:Compost toilet.Composting toilet at Activism Festival 2010 in the mountains outside Jerusalem. File:Clivus Multrum Composting toilet with urine diversion-dehydration.A composting toilet schematic (Clivus Multrum). File:Arborloo-en.An Arborloo for later planting trees. File:Humanure<unk>  inside view, Mongolian family house, Ulaan Baatar 2010, by Wolfgang Berger (6211327744).A container-based toilet or bucket toilet, another type of<unk> . File:Defecating into a pit (schematic).Schematic of a simple pit latrine with a squatting pan and shelter.
Dry toilet
Composting toilet
Tao brush
Oral hygiene
Urine-diverting dry toilet
Suction 
Suction
Boil-water advisory