See if your Water Company has a website and look up your annual water report. The report tells you exactly what's been found or added. My water company even goes on to explain all the sources of water, be it from streams, and rivers, and basins or purchase from another state. A lot of people are scared of tap water but in the USA its really not that bad and in some places its actually very good.
Boiling water won't remove minerals and many chemicals, but it will kill pathogens and make it safe for drinking. But again if you live in the USA you don't have to fear your water. Living in a third world country, then definitely boil it.
Now if you want to remove minerals and such, get a water filter. Should only set you back $30 and one filter will last for months.