Jayapataka Swami: See the Ganges was brought down by Bhagīratha Mahārāja, because his forefathers were burnt to ashes by offending Kapiladeva. So, he brought the Ganges down, because the Ganges, if she touched the ashes of his forefathers, they would be delivered. So, your question was whether putting the ashes in the Ganges, and from this pastime, we can see that the ashes touching the Ganges is a mercy.
27-June-2020 SRI DHAM MAYAPUR, INDIA