The easiest way is via a solar distiller. Even the small, manufactured models you can purchase will produce a quart or more of pure water from a mud puddle.
Answer:
It depends what it is "dirty" with:
Well........ If the water is dirty chances are if you bathe in it you will be dirty, and if you are dirty than you will get clean if you use soap and what not
Use soap
The principle is 'dilution': with the first addition of clean water to dirty water, the dirty water becomes less dirty because it is diluted by the clean water. With the continued addition of clean water to dirty water, eventually the dirty water will be completely diluted and there will be no dirty water left; it will all be replaced by clean water.
they make it clean or they dont use water
to clean dirty water it needs to be cleaned or filtered
clean water is naturally dirty, it goes through a process in which then it becomes clean.
You can use clean tap water for your goldfish, but not dirty or used water.
You could use a filter or if the water is muddy you can also use the method of sedimentation.
dirty
Why would you want to? You used that water to clean something that was dirty and that dirt gets trapped in the water, and thus making the water dirty. Well I guess if you have plants or something you could use that water on the plants, but other than that there is no reason to reuse it.
In clean water.
Fresh water is not dirty because it is fresh and clean