To analyze your water is not a problem, but an expensive pleasure. This problem arises (quality control) during the construction of wells, wells, etc. But you can carry out the check yourself if you have the right set of chemicals. I personally bought these sets. It cost about 500 p. True, in our city there are no such sets. They sent me from Moscow. Using this set, you can determine the main indicators of the source, as well as know the permissible norm.
I am writing for those who are faced with such a need. There are such sets, use it.