The best household filtering system for drinking water is a distiller with carbon filter.
Distillation removes the widest range of contaminants from your tap water.
What are these contaminants: Microbiological entities Heavy Metals Organic Chemicals Inorganic Chemical However, there was a problem.
Distillers were unable to remove volatile organic chemicals with low boiling points.
Hence, since the 1970s - water distillers have incorporated volatile organic chemical(VOC) "vents" or have used various types of carbon filters to remove these VOC's.
Distillers still have drawbacks - one being that they produced distilled water very slowly.
Another drawback is that they remove the beneficial minerals from tap water and give water a flat taste.
I suggest you consult your physician to see if it is OK for you to drink water that has the minerals removed.
There are some experts who believe that drinking de-mineralized water is fine because the body gets most of its mineral requirements from food - whilst there are others who believe drinking de-mineralized water is an unnatural and unhealthy practice.
So, to be cautious - seek the counsel of your doctor.
If you are considering the best household filtering system for drinking water you should also take the opportunity to consider a filtering device for your shower.
The contaminants in our shower water get into our body just too - through your mouth, through your skin - through your nose when you inhale.
Those contaminants in your shower water can have an adverse effect on your health as well.