I'm really not a fan of this guy's style. The man won't hold a shot for three seconds, almost none of his cuts have common elements to smooth the transitions, and just about all his visuals are shaky-cam. That, and the visuals are so parenthetical it may as well be an audio interview.
I am increasingly of the opinion that you should not drink tap water habitually. It's not that our local municipalities don't try really hard to make the water drinkable...but that it's just not cost-effective for them to do as good a job as a cheap Britta filter on the spigot can.
Tap water is what you shower with, what you water your garden with, what you wash your laundry or dishes with. Maybe in a good situation 0.01% of the "tap" water a local water works cleans will become drinking water for people. Is it worth it for them to do a good job? Not really. Certainly not like a private bottled water vendor, where 98% or more of their water will become drinking water.
Standards for drinking water are arbitrary, and there is good reason to set those standards REALLY high, and purification is expensive. Expecting water supplies to be up to human drinking standards isn't practical anymore.
The eventual future of humanity is nuclear power. This is not a choice; either we will switch to using nuclear power, or we will run out of fossil fuels and slowly regress back to the middle ages.
No, I'm serious. This "use less energy and go renewable" fad might look responsible, but its very destructive in the long run. Societies are best measured by the energy source they use. Is it portable? How much energy does it contain? How efficiently can you utilize it? Here, check this visual I threw together in Excel to see what I mean.

I don't call the nuclear power civilization a "space colonizer" for nothing. I've done the math; with that kind of energy, traveling to the planets is about like buying a plane ticket to Hong Kong...with some reasonable, but optomistic technology assumptions.
I say this to put things in perspective; when you see what the future must be, the path for the present becomes obvious. If we switch to "renewable" energies right now, humanity won't have an energy source strong enough to develop past where it is. In fact, it will probably regress economically and culturally. Wealth will be shuffled around, nations rise and fall, but for five thousand years nothing really important will happen. Conversely, Nuclear power isn't quite ready for prime time. Thorium reactor designs aren't agreed upon yet, and, barring that rumor India is building a 30 MW fusion reactor right now, fusion isn't ready, either. We need Earth's fossil fuels to last just long enough to smoothly transition us to nuclear power, and, just guessing, I put that transition at least twenty years out. If fracking's what's necessary to do that, so be it. It's better than the alternative.