1. Type of water
   1. Earth
      1. Sea
         1. Yes
      2. River
         1. Yes
      3. Well
         1. Yes
      4. Lake
         1. Yes
   2. Sky
      1. Rain
         1. Yes
      2. Snow
         1. Yes
      3. Hail
         1. Yes
2. Description of water
   1. If water has
      1. Smell or Taste or Color
         1. No
   2. If water doesn't have
      1. Smell or Taste or Color
         1. Yes
3. State of water
   1. If Impurity falls into water
      1. If water (required description of water) changes
         1. No
      2. If water doesn't change
         1. Yes
   2. If Pure substance falls into the water
      1. If water changes
         1. No
      2. If water doesn't change
         1. Yes
   3. Leftover water
      1. In this category, by default: - If the description of water doesn't change, then yes, it is a good water, and - If the description of water changes, then it is not good water to clean with
      2. From Human
         1. Muslim
            1. Haaidh (Woman having periods)
            2. Yes
            3. Junub (man after ejaculation)
            4. Yes
      3. From Animals
         1. Halal to eat (live animal)
            1. Yes
         2. Non-halal to eat (live animal) Eg. Lion, Cow, Snake
            1. Dog and Pig
            2. No
            3. Rest of the animals (non eatable live animals)
            4. Size of the water
            5. Large (greater than about 42 gallons)
            6. Yes
            7. Small (Less than about 42 gallons of water
            8. No
4. Container that carries the water
   1. Everything is halal except something that is not permissible.
   2. Gold, Silver
      1. Do not "eat" from Gold and silver, but we can make tahaara (wudoo) from it
         1. Yes
   3. Container of disbeliever
      1. If you have doubt that, that person may contain najaasa (like dog or pig)
         1. After you clean it, you can use it
            1. Yes
         2. If you don't clean it
            1. No
      2. If you don't know if it may contain najaas
         1. Don't ask, and just use it
   4. Leather of animal
      1. Eatable animal
         1. If processed /cleaned
            1. Yes
         2. If not processed/ cleaned
            1. No
      2. Non-eatable animal
         1. No
5. Required Description of Water needs to be Odorless, Tasteless and Colorless