This curricular unit aims to respond to the training needs of students who may be involved in the evaluation, design, construction and operation of water and wastewater treatment infrastructures (domestic and industrial). Decision making process skills are promoted through the development of decision-making capabilities by solving design verification exercises and operation of water and wastewater treatment units. The capacities of planning and critical analysis are promoted through data evaluation of case studies related to wastewater treatment plants, drinking water treatment plants, sewage and water distribution networks.