Due to Chaitanya in Idols of Shri Ganapati on immersion it purifies the water. With the flowing water, this Chaitanya reaches far and wide and many people benefit from them. This water evaporates, too; hence, it makes the atmosphere sattvik (Sattva-predominant). A. ‘Donation of Idol’ is unscientific, ‘immersion of Idol’ is most appropriate : It is mentioned in the scriptures, that immersion of Shri Ganesh Idol should necessarily be done in flowing water or a reservoir. However, some people view the immersion of the Idol as an act that causes water pollution, famine etc.