I believe that people should not choose bottled water because tap water can be safe to drink.
Plastic makes our lives easier, but some people do not take into account the damage of the plastic bottle. In many places, tap water is regulated to ensure safety before it arrives in your home. Even if it isn't, people can buy filters that clean the water inside the home. Tap water is also safer, because the water in plastic bottles can get too hot or too cold and chemicals from the plastic can get into the water.
Bottled water creates garbage. For example, the U.S. goes through about 50 billion water bottles a year. Not all of these bottles are recycled. Bottles used to package water take over 1000 years to biodegrade, and if they are incinerated they produce toxic fumes. Recycling is only possible in limited circumstances because only PET bottles can be recycled.
Finally, tap water is basically free! Bottled water usually costs 1 TL or more, and if you drink 3 bottles per day it would cost 90 TL per month. That is 1080TL per year! What else could you buy with that?
For these reasons and more, I believe that people should find ways to drink tap water when they can.