Improved and unimproved sanitation facilities

Improved sanitation facilities is a term used to classify the types or levels of sanitation for monitoring purposes. This term was created by the Foundation and the World Sanitation Organization’s 2002 Water Supply and Sanitation Joint Monitoring Program (JMP) to help monitor the achievement of the Millennium Development Goals ( MDGs) progress towards the goals. The opposite of "improved sanitation facilities" is "unimproved sanitation facilities" in the JMP definition.
  
The Joint Monitoring Program for Water Supply and Sanitation (JMP) annually publishes the latest status of global sanitation. For example, it is reported that in 2015, 68% of the world’s population can obtain improved sanitation conditions.
  
In 2017, JMP defined a new term: "basic sanitation services". This is defined as the use of improved sanitation facilities that are not shared with other households. The lower level of service is now called "limited sanitation service", which refers to the use of improved sanitation facilities shared between two or more households. The higher-level service is called "sanitation of safety management". This is a basic sanitation service, in which excrement is safely disposed of on site or transported and disposed off site.