Source separation programs of dry household waste have been launched in Mashhad since 1997. However, the public participation rate and the amount of separated dry waste is not in a satisfactory level. This research examined the influence of various factors including intrinsic, extrinsic and etc on household waste separation behavior of citizen. The aim was to determine the variables which motivate and deter people to recycle at home. The data was gathered by means of questionnaire from 330 people. The results reveal that age, information and knowledge, situational factors, moral obligation, attitude and perceived behavioral control and social norm are correlated with source separation behavior. The participants stated that the feedback is the most motivating factor for doing domestic source separation while inadequacy of waste facilities or far location of bins from their home hinder them to recycle. The results of multiple regressions showed that the information and knowledge about waste is the best predictor of voluntary waste separation behavior of the participants in Mashhad city.

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