Studies of dermatological morbidity in the workers of alumina enterprises showed a lowered incidence of skin lesions caused by common chemical harmfulness and increased incidence of allergic occupational dermatoses. Different types of such dermatoses are related to the ore used. The total level dermatologic morbidity mainly depends on the technology stage of the process but not on the type of raw material. Dermatologic screenings have shown that skin mycoses were the most incident among the dermatoses, whereas analysis of sick-leave records indicates the highest incidence of pyoderma; this necessitates adequate preventive measures.