Controlled/living radical polymerizations carried out in the presence of water have been examined. These aqueous systems include both the homogeneous and the various heterogeneous

namely dispersion

suspension

emulsion and miniemulsion

Among them

the most common methods allowing control of the radical polymerization

such as nitroxide-mediated polymerization

atom transfer radical polymerization and reversible addition-fragmentation transfer

are presented in detail. Good prospects for controlled/living radical polymerization in aqueous media are also shown.