Polyaluminium Chloride (PAC) is freely soluble in water, and has quite strong ability to increase and enforce sedimentation, adsorption and agglutination during hydrolysis process. This product is mainly used to purify drinking water and treatment of industry waste water, such as the radioactive material and heavy metals such as lead, chromate, Arsenic, mercury and others in waste water. It is also widely used in precision casting, papermaking, tanning and some other fields. Aluminum has always remained the primary element of water purification used in both industries and household. The source of aluminum is alum. Alum was low in cost and was available easily. But there are some other cost incurred after the purchase of the alum. Additional chemicals are to be added to get the effective results. There is high amount of pH in alum that is to be reduced using chemicals like caustic soda. The treatment of the sludge and solid waste disposal is included thereafter. Thus polyaluminium chloride is the solution we provide in Perth for better performances of waste water management. The chemical has lower pH levels that need less necessity of adding other chemicals. Polymers used with aluminum works better than polymers used as primary coagulants.