In recent years a significant increase in municipal solid waste (MSW) amount has been noted in Poland, and yet there is no fully efficient system for its treatment. Undertaking projects for rational MSW management requires considering both technical facilities and social barriers (waste reduction, re-use and segregation in households). In Poland, attempts to educate and mobilise society to segregate recyclables have not yet produced satisfactory results. Society's awareness in this field needs to be raised. The purpose of this study was to determine the level of knowledge and understanding about MSW management and the relationship between knowledge possessed and actions undertaken for various residential age groups in two Polish provinces. In all groups, 30% of the respondents showed a satisfactory level of knowledge, whilst an equally small number of individuals had undertaken actions for MSW management at home; people with a higher level of knowledge undertook such actions slightly more often. No significant differences between the provinces were found, but residents of town, where waste segregation has been introduced simultaneously with an information campaign, showed a higher level of knowledge. The study points to the need to further educate people about MSW, and to encourage the teaching of pro-environmental attitudes.