I believe that a combination of:
1. Boiling for at least 2 minutes
2. Carbon filtering.
3. Distillation
will provide drinking water that is pure enough to use.

If you want Really clean, I’d go with using a filter with Silver nanoparticles, since it can decompose toxic halo-organic compounds such as pesticides and reverse osmosis.

The water that comes out of this process IS clean, but not suitable for drinking since it doesn’t contain any minerals or salts which can cause dehydration.

Source: https://en.wikipedia.org/wiki/Water_purification

I’m sorry. I was thinking of something else.

So what’s the solution? Nothing is 100%. I think that the possible pesticides contaminants will contribute to the overall effect to your system not the survival aspect. Hell, our own water treatment facilities can’t guarantee more pure water treatment than any of the other “back up” survival techniques.

Regardless of any and all attempts to purify ones water some whack a loon will figure a way around it. What amazes me is that most of us aren’t more effected by all the toxins. I expect some day to reach down and find that “my boys” will have disappeared but on the positive side i’ll have a lovely pair of knockers to occupy my time.

To eliminate the lower boiling point chemicals you need to vent the process. That means that you get the water to a rolling boil and allow the vapors of the lower boiling point chemicals to vent off before you start the distillation process. Make sense?

I believe that is an incorrect statement. Can you back that up with documentation?

Distilling removes some things (like chorine) but not others (like heavy metals and fluoride). Anything not removed by distillation becomes more concentrated. As the water evaporates there’s less water to dilute those materials.