Alasdair, the small home water distillers about the size of a kettle use at least one filter to trap VOCs. The better distillers use two filters. A large size glass / pyrex distiller that you might see in a chem lab has a much longer column and does not need filters.
Frank, not the right time to do more plumbing to my house. We are AC 'friends' so send me more info if you like.
I saw a quack naturopath that put me off them for years. This naturopath takes small sample / drops of blood which he then magnifies to describe the cells and his client's health. Can tell if not enough of some cell types, too much of another, and if some cell types are under stress. Think of chemistry classes where different chemicals have different shapes and/or colours. His comments supported many of the things I knew from my doctor and regular blood tests.
I accept the studies of some that extra fluoride in the water is unhealthy (there is some in the foods we eat). In earlier housing I survived drinking rain water by brushing my teeth.
A common myth that one hydrates only with water. Get water from milk, even from coffee, and from food. Obviously more fluid in a fruit salad than biscuits.
Clayton, was your first sentence tongue-in-cheek? Coffee can act as a diuretic but for people who are accustomed to drinking it, no obvious running to the toilet and does provide some liquid.
Drink b4 you are thirsty mate, that way you wont be dehydrated.
Not everyone gets affected the same way, some get headaches, head spins, dry lips or cold sores etc.
Thing is, No one has ever been you before so do what ever it takes to stay healthy.
In 3 hours of riding, even moderately I would have emptied 2 bottles of liquid by than.
Thats just me though.
Mouth or nose breather?
These articles are often more than a little too broad in assumptions. I have one kidney, and find that "sports" or recovery drinks do the trick for me after a hard ride. If I go without at the end of a long ride, or the now occasional competiton ride, I go through a very "flat" phase a few hours later. I can avoid this by using energy/recovery drinks, and my doctor ( a marathon runner ), confirms that I am doing the right thing.
I like to use the Hammer Nutrition products, chiefly because after I first used electrolyte drinks (powerade from powder) I went for a dental check-up and my dentist said "OMG what have you done!!!". Normally he used to say I had the 'teeth of the week' but not any more would he say this. The only thing different to what I'd normally done was used Powerade. 4hr+ mountain bike rides through places in the hills where you can't top up your water bottles, relying only on two bottles powerade, meant that my mouth was really dry, and little or no saliva to rinse your teeth afterwards. So for a while I used to take one powerade bottle, and then rinse my teeth with water with the other bottle.
But now I've gone one step further, after trying Hammer Nutrition products. They're expensive, but you take the electrolytes as capsules, which means they don't cut through the enamel of your teeth. The carb or carb and protein drinks don't have crap in them that are bad for oral health and decay.
I can still go for 4hr+ rides without such nutrition products, but if I want to train hard day after day it helps recovery a lot if you drink, consume electrolytes, and replenish muscle glycogen stores as you ride.