Indoor tap water: is tap water which is produced according to industrial technology and is linked with a system of taps installed inside or outside the house but within its premise.

Public tap water: is tap water which is produced according to industrial technology and is linked with a system of taps installed in public places for common use.

Drilled well: water is taken from deeply-drilled wells to take ground water through a small hole with a protected tube; water is often taken up through a system of pumps. "Tower water" is also counted as drilled well water. Tower water also looks, if we view it from the outside, like tap water, and is also taken from drilled wells and brought up to a tall tower. Then there is a system of tubes to lead it to each household for use. However, before being consumed, it is not processed according to an industrial process (raining sieves, filter system, pasteurization, filtration pools).

Protected dig well: water from a dig well-constructed with bricks (or other protected materials) to block unclean water from soaking into the well, and on the ground there is a wall to prevent things from falling down into the well.

Unprotected dig well: water from a dig well without brick construction and walls to block unclean water from soaking into the well, or to prevent things from falling in.

Protected slot water: slot water comes from the upper reaches of rivers and streams, and is poured from artesian water (slots) of mountains (land- or rock-mountains). Protected slot water is the water taken from slots, which are protected to block unclean things to fall into the slots.

Unprotected slot water: slot water that is not protected and cannot prevent unclean thins from falling into the slots. They are often slots without pools.

Rain water: rain water which is collected and kept in storage (water tanks, pools, etc.) to use.

Other: is the water not listed above, such as: pool water, lakes, canals, rivers, stream water, etc.