Never ask what you need. Say, I want to reduce xxx to under x ppm.
The people you speak with will be salesmen. They can go on about the horrors of impure water and disease. Ever notice that when you are looking for a house or a car their first question is “What is your budget” then show you things near the top of that number and in the end the total is above that?
Although not your case, I did remember a scam going around up in Canada. This was a free home water test and reported by the CBC which is like our PBS.
