Any of the offers like this I have done are just leads to very expensive conditioner systems. They generally don't really test for anything you really care about like pfas.

The one I have done just show up to your house with another test that changes some colors and shows that you have high or low ph or whatever. But if you look at the range of the test the thing turns a certain color at right over/under and they have no way of telling you what it actually is, and then they try and sell you a 8k$ filtration system.