Getting the drinking water system that produces the purest drinking water all comes down to comparing the documentation and certified results of different systems. Here's some important stats and info to use so you can judge how effective each drinking water system really is.
One of the most important factors in determining which filtration unit makes the purest drinking water is how much chlorine and chlorinated byproducts (THMs) it removes. Of course, what you're aiming for is 99%, as that's the highest any product will claim it removes, probably for legal reasons. Chlorine is the standard disinfectant used in our public treatment plants, and it often bonds with other compounds to form THMs. The best drinking water system will filter all of these contaminants out for you.
The contaminant that is most prevalent in drinking water next to chlorine is lead. It's the # 1 environmental health threat to our children and mostly comes from the pipes, fixtures, and soldering joints in our plumbing systems. Again, 99% removal of lead is ideal.
The purest drinking water system will also remove volatile organic chemicals (VOCs) and other synthetic chemicals. Believe it or not, our society routinely used over 80,000 different synthetic chemicals, and over 2,000 of them are known to be toxic and cause cancer. Filtration systems that utilize technology like sub micron and carbon block filtration are most effective at removing VOCs and synthetic chemicals.
Thanks to agricultural and lawn runoff, many kinds of herbicides and pesticides end up in our tap water. Some of the most common ones that the purest drinking water system should have removed are Lindane and Alachlor.
Also make sure that the filtration unit you get effectively gets rid of chlorine-resistant organisms / cysts like Giardia and Cryptosporidium. These are water-borne parasites that cause flue-like symptoms and gastrointestinal problems.
If you can find a drinking water system that removes close to 99% of all these contaminants, then you can be pretty confident than you're drinking the purest drinking water possible. And one that does not strip the natural trace minerals from it is even better, seeing that our bodies are build to run on pure water with natural minerals like calcium, potassium, and magnesium.
The drinking water system my family and I use in our home uses a multi-stage filtration process to remove 99% of all contaminants. They're easy to install on your kitchen faucet, they also sell filters for your showers, and they even have a whole house filters available. But with the faucet unit, it only costs us 9 cents for each gallon of pure, safe, healthy drinking water it makes. You really can not get any better than that!