5. Well Water

48. The water of a well which springs forth from the earth, although its quantity may be less than a Kurr does not become Najis owing to something Najis falling in it, unless its smell, color or taste changes. However, it is recommended that, in the event of certain Nejasat falling in it, a quantity of water should be drawn from the well. Details about this quantity are given in the relevant books.

49. If a Nejasat falls into well water and changes its smell, color or taste, it will become Pak as soon as it is mixed with the fresh water springing from the earth, which make changes vanished.