This book is intended for students of Professional Licences and BTS. It contains 9 chapters, namelyChapter I: The importance of water in industry.Chapter II: Impacts of Industrial Wastewater Pollution.Chapter III: Moroccan environmental legislation.Chapter IV: Moroccan Standards of Industrial Wastewater Discharges.Chapter V: Methodology to be followed for the Management of Industrial Wastewater.Chapter VI: Methods and Means of Analysis of Industrial Wastewater.Chapter VII: Elementary processes of physical-chemical engineering in water treatment.Chapter VIII: Elementary processes of biological engineering in water treatment.Chapter IX: Case studies in industrial wastewater treatment.These different notions are approached in a simple and comprehensible way for the students in order to assimilate the basic notions related to the Industrial Wastewater Treatment.