I initially obtained a free water sample analysis via Home Depot. Chris called me (albeit weeks later so I had already forgotten about the testing) and gave me preliminary results. However, he offered a free more extensive analysis if I permitted him to come to my home which he did a few days ago (along with a “trainee”). Although his “shtick” was at times a bit heavy, he performed all of the tests and gave me good data on my water and my filtration system. I would recommend him/the company!