Where should fluoride ideally be added to maximize its effectiveness in drinking water?

Fluoride should ideally be added to drinking water at the point that maximizes its contact time with the water supply and allows it to effectively contribute to dental health. The statement regarding its addition at the "least possible place of removal" emphasizes that fluoride should be added upstream in the treatment process where there is minimal chance for it to be removed through subsequent treatment stages or while the water is in storage.

Adding fluoride at this point ensures that it thoroughly mixes with the water and remains in contact long enough to provide the desired health benefits. If fluoride were added too late in the treatment or distribution process, there could be increased risk of its removal through filtration or sedimentation, which would diminish its effectiveness. This strategic placement also allows operators to ensure the fluoride concentration remains consistent and within recommended levels for public health, making it more beneficial for the population served.