The development of industrial facilities is causing increased discharge of industrial wastewater in municipal system. This represents a severe burden on the environment. Sustainable water management is so inevitable, that it is necessary to process polluted wastewater in a suitable treatment plant. The graduation thesis discusses an area of the physico-chemical treatment of industrial wastewater. Mentioned processes are used to ensure appropriate limit values for a connection to municipal systems that can end up with a municipal sewage treatment plant or direct effluent into watercourse. Limit values are regulated by EU laws with its directives and by Slovenian legislation with its legal acts. In the following thesis are explained the main physico–chemical wastewater treatment technology. This includes coagulation and flocculation, adsorption, ion exchange, membrane filtration, chemical precipitation, chemical oxidation and advanced oxidation processes. Author presents an overview of the largest emitters in the industry and industrial sectors, where are emissions and the amount of industrial wastewater the highest. Author also calculated the amount of discharged wastewater and the cost resulting from the payment of environmental charges for individual industry. At the end it is shown how limit values of emissions are ensured in the BREF reference documents for specific industries.