Fiqh al-Tahara — Islamic Purity: Classification of Impurities, the Two Types of Najasa, and the Conditions of Ritual Cleanliness

The Two Dimensions of Tahara

Tahara Hukmiyya (ritual/juridical purity): a legal state that must be acquired through wudu or ghusl. Purity of this kind has no visible impurity — you may look perfectly clean — but if wudu is broken or ghusl is required, you are in a state of hadath (ritual impurity) and cannot pray, touch the Quran, or perform tawaf.

Tahara Hissiyya (physical purity from najasa): the removal of actual physical impurities from body, clothing, and prayer space. This is a condition of the place and clothing of prayer, not merely the performer’s state.

Both are required: a person who has performed wudu but whose clothes carry najasa cannot pray validly.

Grades of Najasa

Najasa Mughallaza (severe/heavy impurity):

• The saliva/body of pigs (in all schools) and dogs (Maliki excepted — dogs are not najis in Maliki fiqh)
• Blood in large quantities
• Excrement (human and most animal)
• Removal: seven washes, the first or last with soil/earth (in the Shafi’i and Hanbali position for dog saliva)

Najasa Mukhaffafa (light/lesser impurity):

• Urine of a male infant who has not yet begun eating solid food (a leniency based on hadith)
• Small quantities of blood (some schools)
• Removal: sprinkling of water is sufficient (not full washing)

The Permitted Thresholds

Classical fiqh does not require absolute purity from all traces — the body and environment are acknowledged as inevitably exposed to impurities. The threshold:

• Solid najasa: less than a dirham (coin-sized amount) on clothing is generally forgiven
• Liquid najasa: a small drop is often forgiven if it would be impossible to avoid in normal daily life

Water and Its Categories

Water used for purification must be mutlaq (pure water — rain, river, sea, well water not mixed with impurities). Categories:

• Mutlaq: absolutely valid for wudu and ghusl
• Musta’mal (used water — that which has already run off the body during wudu): Hanafi permits it; Shafi’i does not
• Mutanajjis (contaminated water): invalid

See also: Fiqh Al Wudu, Fiqh Al Ghusl, Understanding Namaz, Sunna Al Nabawi, Niyyah, Fiqh Al Sawm