 By 2008, 41% of people (73.2 million) in Brazil were getting artificially-fluoridated water.Water fluoridation was first adopted in Brazil in the city of Baixo Guandu, ES, in 1953.A 1974 federal law required new or enlarged water treatment plants to have fluoridation, and its availability was greatly expanded in the 1980s, with optimum fluoridation levels set at 0.8 mg/L.