Making a Water Filter

It is hard to say. It depends on how muddy the water is. If the water is directly from a muddy river, the mud and solid deposits contained therein can be as much as 40%. So, theoretically speaking, you can only have about 60% of the original volume after filtering. If the water is just from a rusted water pipe, the solid particles are minimal, and you might get more than 97% after filtering.

Hearsay that the mud contained in Yellow River (黃河) was at one time up to 45%.