Water is the source of life: 60% of our body weight is made of water. Also if it looks clear and seems odourless, water may contain dangerous substances to our health. Even when perfectly controlled and safe at the source, water can be contaminated by infiltrations, unsuitable piping systems, cleansing agents.
There are a lot of water purifier machines on the market.
First of all you need to decide what you want to focus on.
It is also important to highlight that over-filtering the tap water is also not healthy. This is becasuse it may remove some useful minerals which are essential for the optimal functioning of your body.