Municipal Water Treatment Polyaluminium Chloride PAC Coagulant Description Polyaluminium Chloride / PAC is an effective primary inorganic coagulant based on trivalent Al3+, excellent for drinking water production, wastewater treatment, as well as swimming pool treatment. Through the hydroxyl ion bridging function and the polyvalent anion polymeric function, it produces large molecular and high electricity inorganic macromolecule, brings higher performance than traditional