Water Quality/PFAS testing Southern New Hampshire

I think my parents need have their water quality tested. I don't think they've ever done it and based on there location I have concerns about it and to see they should have some sort of water treatment put in beyond the softener they currently have and using the on faucet carbon filter for drinking water.

Has anyone had this done lately around the Derry, Londonderry, Hudson area and had results that were concerning and what did you do about?