I just wanted to add that a reverse osmosis system would bypass the lead and I think everything else there in your drinking water. If you are going to have kids in the house then you need to fix the lead issue because especially little ones will drink the bath water.

But yes, knowing why you have that much lead in your water and the source is important. It could be lead pipes or soldering. From my own research I found that, especially if it is an older well, if there is a lead packer installed down in the well then you’ll have to get it lined at some point to stop the problem.