DRINKING WATER PRODUCTION PROCESS Drinking water is usually produced from underground sources. WATER EXTRACTION Underground water is extracted with pumps in a water extraction plant. OXIDATION AND COAGULATION An oxidising agent is added to neutralise microorganisms and organic substances in the raw water. Chemicals introduced by the aerator sparger cause contaminants such as dead microorganisms and organic/inorganic substances to coagulate into tiny flakes (microflocs). FLOCCULATION In the flocc