The problem of hazardous medical waste resulting from the provision of healthcare services by healthcare institutions is becoming increasingly relevant in the context of the need to ensure environmental protection and safety to human life and health. This requires efficient management of waste in order to minimise its level of hazard. The most common problems in this respect are found at the stage of the temporary storage of hazardous medical waste, as confirmed by irregulari-ties reported over the last six years at healthcare institutions in the 388 (16.4%) from the Great Poland Province voivodship, which is the third voivodship in terms of hazardous medical waste generation in Poland. Violations of sanitary and building regulations in the storage of hazardous medical waste could lead to widespread infection and infectious diseases in humans and to the environment. This should be prevented through the introduction of continuing education for the personnel having direct contact with waste and for the management staff of healthcare institutions with a view to fostering awareness and responsibility regarding sanitary security and environmen-tal protection.