A latrine is a

toilet A toilet is a piece of sanitary hardware that collects human urine and feces, and sometimes toilet paper, usually for disposal. Flush toilets use water, while dry or non-flush toilets do not. They can be designed for a sitting position popu ...

or an even simpler facility that is used as a toilet within a

sanitation Sanitation refers to public health conditions related to clean drinking water and treatment and disposal of human excreta and sewage. Preventing human contact with feces is part of sanitation, as is hand washing with soap. Sanitation syste ...

system. For example, it can be a communal

trench A trench is a type of excavation or in the ground that is generally deeper than it is wide (as opposed to a wider gully, or ditch), and narrow compared with its length (as opposed to a simple hole or pit). In geology, trenches result from ero ...

in the earth in a camp to be used as

emergency sanitation Emergency sanitation is the management and technical processes required to provide sanitation in emergency situations. Emergency sanitation is required during humanitarian relief operations for refugees, people affected by natural disasters an ...

, a hole in the ground ( pit latrine), or more advanced designs, including pour-flush systems. The term "latrine" is still commonly used military parlance, less so in civilian usage except in

situations. Nowadays, the word "toilet" is more commonly used than "latrine", except for simple systems like "pit latrine" or "trench latrine". The use of latrines was a major advancement in

over more basic practices such as open defecation, and helped control the spread of many

waterborne diseases Waterborne diseases are conditions (meaning adverse effects on human health, such as death, disability, illness or disorders) caused by pathogenic micro-organisms that are transmitted in water. These diseases can be spread while bathing, washin ...

. However, unsafe defecation in unimproved latrines still remained a widespread problem by the end of 2020, with more than 3 billion people affected (46 % of the global population). Eradication of this public health threat is one of the United Nations' 17 goals for sustainable development.

Terminology

The word "latrine" is derived from the

Latin Latin (, or , ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through ...

''lavatrina'', meaning bath. Today it is commonly used in the term " pit latrine". It has the connotation of something being less advanced and less hygienic than a standard

. It is typically used to describe communal facilities, such as the shallow-trench latrines used in

situations, e.g. after an earthquake, flood or other natural disaster.

Types

Many forms of latrine technology have been used, from very simple to more complex. The more sophisticated the system, the more likely that the term "toilet" is used instead of "latrine".

Pit latrine

A pit latrine is a simple and inexpensive toilet, minimally defined as a hole (pit) in the ground. More sophisticated pit latrines may include a floor plate, or ventilation to reduce odor and fly and mosquito breeding (called ventilated improved pit latrine or "VIP latrine"). Many military units, if intended for extended use, place basic shelters and seating over the pits. A pit is typically sited well away from any water sources to minimize possible contamination. After prolonged use, a pit is typically buried. Other types of pit latrines may include the Reed Odourless Earth Closet, the

arborloo An arborloo is a simple type of composting toilet in which feces are collected in a shallow pit and a fruit tree is later planted in the fertile soil of the full pit. Arborloos have: a pit like a pit latrine but less deep; a concrete, ferroc ...

treebog A treebog is a type of low-tech compost toilet. It consists of a raised platform above a compost pile surrounded by densely planted willow trees or other nutrient-hungry vegetation. It can be considered an example of permaculture design, as it ...

(very simple types of

composting toilet A composting toilet is a type of dry toilet that treats human waste by a biological process called composting. This process leads to the decomposition of organic matter and turns human waste into compost-like material. Composting is carried out b ...

), or the twin pit pour-flush pit latrine, popularized by Sulabh International. The shelter that covers such a pit latrine is known in some varieties of English as an

outhouse An outhouse is a small structure, separate from a main building, which covers a toilet. This is typically either a pit latrine or a bucket toilet, but other forms of dry (non-flushing) toilets may be encountered. The term may also be use ...

Trench latrine

In a location without longer term sanitation infrastructure, such as for emergency sanitation, a trench latrine is a workable solution. It typically consists of a pit or a trench in the ground, to deep and to long.

Slit-trench latrine

A slit-trench latrine consists of a relatively shallow trench which is narrow enough to stand with one leg on either side (see defecation postures). This type is used either by squatting, with the users' legs straddling the pit, or by various arrangements for sitting or leaning against a support structure. Such support may be simply a log, plank, branch or similar arrangement placed at right angles to the long axis of the pit. This type of latrine is not commonly found in developing countries but can be used for emergency sanitation.

Shallow-trench latrine

The shallow-trench latrine is similar to the slit-trench latrine but is wider (200-300mm wide) than the latter. It is also shallow, with a depth of about 150 mm. This type of latrine is often used in the initial phases of emergencies and is a simple improvement on open defecation fields. A rule of thumb in emergency sanitation provision is to allow 0.25 m² of land per person per day. This means 2,500m² per 10,000 people per day, or nearly two hectares per week. Men's and women's areas should always be separated.

Aqua privy

An aqua privy is essentially a small

septic tank A septic tank is an underground chamber made of concrete, fiberglass, or plastic through which domestic wastewater ( sewage) flows for basic sewage treatment. Settling and anaerobic digestion processes reduce solids and organics, but the treatm ...

located directly below a

dry toilet A dry toilet (or non-flush toilet, no flush toilet or toilet without a flush) is a toilet which, unlike a flush toilet, does not use flush water. Dry toilets do not use water to move excreta along or block odors. They do not produce sewage, and ...

squatting pan or bowl which has a drop pipe extending below the liquid level in the tank to form a simple water seal to minimise odors.

Most basic

* Campers refer to a cathole – a one-use, shallow scrape. * Bucket

References

{{Toilets Toilets Appropriate technology Sanitation