Abstract: Pcrpo~ ：In order to detect genotoxieity of the different samples from water supply and drainage in Shanghai．Methods：vicia—miemnueleus test was used in this study．Results：It showed that besides tap watP2"and pond water in one Park．there exited some different levels of pollution in the rain water，upriver water，one river，and one po llution plant．The water po llution in the infall of pollution plant was the heaviest．Conelnsion：Vieia—mieronucleus test was sensitive．simple，economic．So it was a very valuable short—term bloloical test for screen environmental mutagen．

Key words: genotoxitity, Vieia—micronucleus test, sh。rt—terlTi biological test