WATER TREATMENT CHEMICALS Aluminum Sulphate (Alum) Ferric Sulphate Polyaluminum Chloride (PAC) Calcium Hydroxide Sodium Hydroxide Activated Carbon Chlorine Chlorine Dioxide Hydrogen Peroxide Potassium Permanganate Polymer Flocculants Sodium Hypochlorite Ferric Chloride Sodium Silicate Sodium Carbonate