Table 1.

Description of the main explanatory variables

Variable (%)	Description	Period	Source
Population served with adequate water supply at home	Population supplied with piped water in at least one of the rooms of their household from the following sources: general distribution network, well or spring water on or off the property	2013*	IBGE
Population served with adequate sanitation at home	Population that disposes its sewage in a general sewerage system, rainwater drainage or septic tank	2013*	IBGE
Population served with household solid waste collection	Population served with direct and indirect household solid waste collection, regardless of location (urban or rural)	2013*	IBGE
Schools with filtered water	Schools that provide their students with filtered water from filters, such as clay, crockery, plastic or activated carbon filters, that typically has porous filter elements to retain impurities	2014	INEP
Schools served with adequate water supply	Schools with adequate water supply, i.e. which are provided with public network, artesian well and “cacimba” / well / cistern	2014	INEP
Schools served with adequate sanitation	Schools that dispose their sewage into a public sewerage system or septic tank	2014	INEP
Schools with proper solid waste disposal	Schools whose solid waste produced is periodically collected or recycled	2014	INEP

*Values ​​were obtained through population projections. IBGE  Brazilian Institute of Geography and Statistics, INEP National Institute for Educational Studies and Research Anísio Teixeira.