All water is infinitely recycled. Anything that can be put into water can be taken back out. It's just a matter of how much time, energy, and money you want to spend.

I don't know enough about what was going on with that guy's water to comment on specific fixes to his well water. But when you get into issues with rural communities where people are using individual wells, it can get really, really expensive to try to treat all those individual wells. Like many other technologies, water technologies benefit from economies of scale. So for a guy who's private well is suffering from contamination, the costs to remove that contamination can be nightmarish because he's got to pay for the whole thing himself. But if that same contamination was present at a municipal facility serving 1000s of people, the total equipment and operational cost might be much bigger than for the private well but the cost per person amortized out over 20 years might be quite manageable.