What chemicals are added to water for the treatment process?
Ozone gas is generated and injected into the water to destroy bacteria and viruses and control taste and odour-causing materials. Alum (aluminum sulphate) is added to produce a gelly-like floc particle that attracts and captures colour particles, bacteria, and suspended solids from the water so that they can be removed. To assist the alum in it’s removal of particles, a polymer (magnafloc LT 22) is added to produce larger, stronger floc particles that can be removed from the water more efficiently in the settling and filtering processes. Liquid Chlorine is added to the water as it is leaving the treatment process to ensure the water is protected as it travels through the distribution piping from the potential introduction of bacteria through leaks or other means. Concentration of Chlorine is strictly controlled at 1.2 mg/l (PPM) by continuous monitoring of the treated water stream. Fluoride is added to the water to prevent tooth decay in children.
