Why why is fractional distillation not used to produce drinking water?

Fractional distillation is not used to produce drinking water because it is primarily designed for separating components of liquid mixtures based on their boiling points, which is not efficient for purifying water. The method is energy-intensive and costly, making it impractical for large-scale water purification. Instead, processes such as filtration, reverse osmosis, and chlorination are preferred, as they effectively remove impurities and contaminants from water at a lower cost and energy requirement.