In episode 2 of Noragami, we see that when Yato's hand gets blighted, he can remove the blight from his body with water from the Shrine he sleeps at.

[![Blight cured with water][1]][1]

However, in episode 9 Hiyori successfully removes her blight with water from Kofuku house. Are there any criteria for the water that is used for cleansing a blight?

  [1]: https://i.sstatic.net/tpluN.png