Plastic cooling towers can be constructed of an anti-microbial HDPE material. The anti-microbial resin contains additives that operate on a cellular level to continuously disrupt and prevent uncontrolled growth of microorganisms and biofilm within the cooling tower. Legionella, the bacteria that causes potentially fatal Legionnaire’s disease, as well as other strains of deadly pathogens that are hosted by some cooling towers, have been substantially reduced in towers made of the material. Efficacy tests were performed by Special Pathogens Laboratory. Also, because the company’s cooling tower fills and shells are constructed of anti-microbial plastic, they are virtually impervious to corrosive water treatments and also minimize the risk of microbial growth.

Delta Cooling Towers