F22Chapter of Waters
Ruling on tahur water altered by a pure substance that keeps its nature
Is purification invalidated by water altered by a pure substance, such as dust, that keeps its nature?
Hanafi
Ablution is valid with water altered by dust, water-formed salt, or leaves fallen into it by chance, since the name of absolute water remains.
Reference: Al-Hidāyah — Radd al-Muḥtār — Marāqī al-Falāḥ
Maliki
Water stays tahur when altered by dust, water-formed salt, or leaves fallen by chance, and it still removes hadath and impurity.
Reference: Al-Sharḥ al-Kabīr — Ḥāshiyat al-Dasūqī — Minaḥ al-Jalīl
Shāfiʿī
Alteration by dust, water-formed salt, or leaves fallen by chance does no harm; the water stays tahur, removing hadath and najasah.
Reference: Minhāj al-Ṭālibīn — Al-Majmūʿ — Mughnī al-Muḥtāj
Hanbali
Water stays tahur, removing hadath and najasah, when altered by what does not blend into it, such as dust, water-formed salt, or what falls in by chance.
Reference: Zād al-Mustaqniʿ — Kashshāf al-Qināʿ — Al-Inṣāf