Aluminum Sulfate (Alum) is inexpensive and effective for a broad range of treatment problems. It functions as a coagulant, flocculant, precipitant and emulsion breaker. As a coagulant and flocculant, alum removes turbidity, total organic carbon (TOC) which can be disinfection byproduct precursors, suspended solids and colloidal color, reduces biochemical oxygen demand (BOD) and clarifies potable, process and wastewater.