A survey of the presence of aflatoxin M1 (AFM1) was carried out on eight traditional dairies belonging to four sectors of Fez city situated in the northern center of Morocco. Raw milk samples were collected between October 2009 and September 2010, and analyzed by LC-fluorescence detection after immunoaf- finity purification. AFM1 was detected in 13 out of 48 samples (27%) at concentrations ranged between 10 and 100 ng/l. Within these positive samples, four (