Poly Aluminium Chloride (PAC) is an effective and reliable coagulant that has gained popularity in various industries, such as paper-making, textile manufacturing, and mining. PAC is a versatile compound that can improve the quality of water by removing turbidity, color, and unpleasant odor. It is also an excellent flocculant, meaning it can bind fine particles together to form larger flocs that can settle more efficiently. PAC has proven to be a viable alternative to traditional coagulants like alum and ferric chloride, as it requires a lower dosage and produces less sludge.