Precarious settlements are urban and rural areas that have incomplete and inadequate development conditions in terms of effective access to public and social goods and services considered essential for the satisfaction of personal and collective needs and aspirations, such as education, health, housing, work, a healthy environment, human security, information and participation, generating conditions of low quality of life and situations of inequality and social exclusion.
They are concentrated in what are commonly known as barrios populares or barrios de ladera, which in turn are the result of a combination of pirate allotments and invasions.
For urban and housing planning purposes, unlike in Sao Paulo and Buenos Aires, they are not classified according to their origin (with boundaries that are increasingly difficult to define), but according to the level of inadequacy to be remedied and the planned urban treatment: Mejoramiento Integral (Integral Improvement – MI) and Consolidación Nivel 3 (Consolidation Level 3 – CN3), which require the preparation of Urban Regularization and Legalization Projects.
The precarious settlements occupy 2,588.89 hectares, or about 6.79% of the total area of the municipality and 22.92% of the urban area (PEHMED 2030). It is estimated that about 33% of the households in the urban area are situated in precarious settlements.