Basic unfavourable factors of working conditions in modern livestock enterprises as well as industrial livestock complexes effects on environmental state are formulated. The relationships between the main subsystems such as forage production, livestock breeding proper, agriproduct processing, working and social infrastructures of the ++agro-industrial complex are established. It is shown that general and occupational morbidity in cattle-breeders is conditioned by the character of production processes, the technology of manure collection, storing, processing and utilization. With livestock enterprises, the borders of their adverse effects spreading in the environment, the rated formulae as well as health improvement measures are validated.