in a continuously developing world, where many activities are high consumers of natural resources, including water, it has become absolutely necessary to apply methods of wastewater treatment. The purpose of wastewater treatment is to improve water quality, in order to be discharged into the environment, without being harmful for different environmental factors. In this paper are presented the equipment used in the mechanical stage of a wastewater treatment plant, and also the status of wastewater treatment plants in Romania.Keywords:wastewater, mechanical water treatment,treatment plant