According to the PLANSAB (2013), 93.3% of the Brazilian population is connected to a network for water supply. It is estimated that 90.4% of the population has sewage collection, but only 39.7% includes treatment and is considered adequate, although according to the IBGE (2010), only 48% of domestic sewage is collected and 39% is heated. The efficiency of sewage treatment plants varies significantly and is considered not entirely satisfactory in some cases.