FDI World Dental Federation supports water fluoridation as safe and effective.[29] the European Academy of Paediatric Dentistry,[30] and the national dental associations of Australia,[31] Canada,[32] and the U.S.[33] The American Dental Association calls water fluoridation "one of the safest and most beneficial, cost-effective public health measures for preventing, controlling, and in some cases reversing, tooth decay."[34]