It is important to filter your water. For instance, lead could be something that exists in your water that can set you back. Chlorine in some municipalities is also a problem. Luckily for me, the water found in the PNW is some of the cleanest in the world so I just have to worry about the iron pipes in our household.
It is expensive though; a long term high priced item would be to get a water filtration unit for your home that might reduce costs in the long term.