The study will be updated in 1993. Small and medium-sized enterprises are a very significant source of hazardous waste. No statistics are available on the type and amount of waste generated. Current practice is to deposit the waste into municipal waste landfills, using the municipal waste transportation system or a specialized industrial waste transportation company. Liquid wastes are dumped into the sewage system.
All Chilean cities have municipal sewers.
Biological treatment plants are being operated at a limited number of sites. The sea is widely used for disposal of liquid waste. Paper mills dump wastes into rivers or the sea with little or no pretreatment. New paper mill plants are installing primary and secondary treatment facilities and cleaner production technologies. There are very few cases of transboundary movement of hazardous waste in Chile.