Polyaluminium Chloride, usually called PAC, is a fast growing coagulant used in water treatment. PAC is highly-efficient for the treatment of drinking water, swimming pool water, sewage and industrial effluents, as well as for paper processing. PAC offers numerous advantages in comparison to other mineral coagulants, including lower dosage requirement, less flocculent needed, reduction of sludge and sulfate concentration, effective at low temperatures, and a wide range of PH.