Some acts are reprehensible when someone is relieving himself such as talking to anyone or to urinate over a crevice in the ground. It is also reprehensible to urinate facing wind direction if it is in an open area.
There are some things that make ablution invalid; such as any discharge from private parts and this applies to stool, urine, semen, blood and wind. Also Deep sleep and touching one’s private parts break ablution.
The primary ruling is that these are permissible to use. However, if it is known that they are contaminated with impurity, then they may not be used until they have been washed.
The water that ensures purification is called tahur, and it is defined as pure and purifying. It is every type of water that retains its original state as it is created, whether it falls from the sky, such as rainwater, snow, and hail, or comes up from the earth, such as the water of rivers, springs, wells, and seas