Improved sanitation
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According to the Joint Monitoring Program (JMP) for water supply and sanitation by the World Health Organization and UNICEF the following are considered as "improved" sanitation:
- connection to a public sewer
- connection to a septic system
- pour-flush latrine
- simple pit latrine
- ventilated improved pit latrine
Sanitation solutions that are not considered as "improved" are:
- public or shared latrine
- open pit latrine
- bucket latrines
Excreta disposal systems are considered adequate if they are private and if they separate human excreta from human contact.
The above-mentioned definition of an "improved" source is used to measure the achievement of the Millennium Development Goal related to sanitation in developing countries. In practice, it is often hard to ascertain during a survey or a census which type of sanitation solution is considered improved or not, thus leading to difficulties in comparing data on the access to sanitation from various sources over the years.
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