I moved into a new house last year near 2 closed down USAF military bases (known to have been previously contaminated by firefighter foam) and did a ton of research on the issue since the house water comes from a well (free water!). I ended up getting a professional water filtration system installed in our basement (carbon tanks, UV light filter, reverse osmosis). Cost me $5k+ for install and ~$1500 year to swap out the tanks and service the system. It's pricey but you can't put a price on clean water.