Don't forget about my favorite part of chilled water loops—the toxic chemicals that lowest bidders are contracted to dispose of.

Source: Environmental and Energy Study Institute (EESI)

Evaporation Process: Roughly 80% of the water evaporates, cooling the servers, while minerals, microorganisms, and chemical additives (like anti-corrosion or anti-scaling agents) remain in the remaining 20% liquid, which is later discharged.