Slum dwellers are a heterogeneous population, and not only the very poor live in slum communities (UN-Habitat, 2003). Even though slum areas can differ substantially cross-nationally in size and other characteristics, extreme housing deprivation is a common trait. The numbers are relatively less dramatic in Brazil: 3.3% of people in Brazilian faveias lack access to tap water and 12.3% lack an indoor flushing latrine in their homes (IBGE, 2010).