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This report describes a study to establish criteria for small quantities of chemical waste from households and similar sources like shops and offices (in the English literature often referred to as hazardous household waste). A system was developed to indicate if these small quantities of potential hazardous waste from households and simular sources should in fact be regarded as chemical waste. In this system aspects like present legislation on chemical waste, environmental impact, etc. were considered. The study recommends providing information on the exact composition of products used in households. Besides this a standard test procedure is recommended to determine the biological degradability of products often used with water in households and discharged into the sewage system.