What does it mean to be certified home compostable?

Most BioPak products are certified industrially compostable to Australian and/or European Home compost standards. Home compostability certification typically requires that the product breaks down in a regular backyard composting environment, like a compost bin or pile. To pass, products are required to break down within 180 days and leave no toxic residue behind: the chemical composition of the compost is assessed and potential contaminants are measured against maximum values.