TFM was stating that the Roman's had crisp clean water from the mountains via the aqueduct. The water has been shown not be be clean but it was polluted with lead that poisoned the people.
I'm a couple years older than TFM and it's interesting hearing him talk about getting older and not being able to do anything. I go to the gym and lift such heavy weights other people stop and stare and even mention how much weight I'm lifting.
I disagree with TFM rather often but he's talking about hockey mask time i.e. when you're going to die, bring someone with you. Our world would be so much better if more people would embrace this way of thinking.