Drinking water every day is important for good health. Some prefer to drink other liquids, but when it comes down to it, none of them can measure up to water in any way. Usually, all that they do is add calories and unnecessary chemicals to the water. The water you drink should be good quality though. How much you can control that depends greatly on where you live. If you are connected to the municipal water system, the water will come to your home treated, and with acceptable levels of chemicals in it. You should receive reports on the state of your water to help you understand the risks and what you as a homeowner can do to further filter and treat the water if you so wish.
If you have a well, you need to get it sent to a lab for testing, and since events around you could affect the quality of your water, you should do so with regular intervals.