AK74 IS CORRECT THAT DISTILLED WATER IS THE CLEANEST, PUREST WATER THAT CAN BE OBTAINED.
The downside is the maintenance and cleaning of the tank that must be done regularly and the electrical elements tend to burn out quickly in the DR due to the brown power. There are also studies that raise concerns about possible negative health effects from the 0 mineral content of distilled water. Some say it pulls a lot of toxins as well as vitamins from th body, so...who really knows?
My opinion, for what it's worth, is to buy a low priced ($250) reverse osmosis unit from Home Depot, Lowes or off of ebay. Make sure it has an ultraviolet light filter on it also. These come with a small pressure tank and a stainless steel faucet that can be mounted right next to the sink and used for drinking water and cleaning vegitables and cooking. I also have mine connected to the fridge icemaker.
For the last two years, I have been drinking this water and have not had any ill effects. My housekeeper and manager think it is much better tasting than bottled water.
In addition to this, I have a whole house sediment tank filter to remove the river mud during heavy rains. This has to be refilled every year.
In addition to this, I also have a whole house ultraviolet filter that filters all incoming water to the pool, showers and faucets. These filters remove almost all of the bacteria and viruses from the water.
I hope this clarified ways of getting reasonbly priced drinking water as an option to the Russian roullete bottled water.