Water treatment plays a vital role in reducing irrigation water usage in HVAC cooling towers. Effective water treatment programs can help minimize blowdown, reduce makeup water requirements, and optimize tower efficiency. This can be achieved through the use of corrosion inhibitors, scale inhibitors, and biocides that prevent the growth of microorganisms. By keeping the tower water clean and free of contaminants, facility managers can reduce the need for blowdown and minimize water waste.