Cooling towers provide an effective method of heat rejection and are widely used for space conditioning, refrigeration, and industrial cooling applications. Maintaining cooling towers typically entails chemical treatments and regular blow-downs to control scale, corrosion, fouling, and biological growth often resulting in 20% to 50% waste. In this Space Conditioning Technology Research Team call, industry experts discussed 4 recent publications related to improving efficiency and longevity of cooling tower systems through various water treatment technologies.